Source: https://realay.io/coverage

# SMS rules by country

Every country has its own rules for SMS. Before you send somewhere new, check which sender types work there, whether your sender ID needs to be registered, and any local rules on opt-outs and content.

255 countries

No country matches that search. Try another spelling, or [email us](mailto:contact@realay.io?subject=Coverage%20question) and we will help.

### Abkhazia · AB · Confirmed

Alphanumeric, long numeric and short code senders are supported without sender registration. Two-way SMS is not supported, and phishing and regulatory content is prohibited.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing and regulatory topics prohibited. |

Last checked 30 September 2026 [Questions about Abkhazia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Abkhazia)

### Afghanistan · AF · Check with us

Alphanumeric sender IDs must be registered, which takes about 5 days. Numeric senders work only from outside the country and are blocked on Etisalat, MTN and Salaam. Two-way SMS is not available, and promotional content, gambling and phishing are not allowed.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Afghanistan) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 5 days. You will need: Company name, contact person, contact email, contact mobile number, message example, use case description |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing and gambling content. Promotional content cannot be registered as an alphanumeric sender. Generic sender IDs such as INFO or Verify risk being blocked. Numeric senders are prohibited on Etisalat, MTN and Salaam. |

Last checked 30 September 2026 [Questions about Afghanistan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Afghanistan)

### Aland Islands · AX · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Aland%20Islands).

### Albania · AL · Check with us

Albania supports alphanumeric sender IDs with no registration, and the ID arrives unchanged. Numeric senders and short codes are listed as supported, but some networks replace numeric IDs with a generic sender, so alphanumeric is the safer choice.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Albania) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory content and phishing are prohibited. |

Last checked 30 September 2026 [Questions about Albania?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Albania)

### Algeria · DZ · Check with us

International senders can use alphanumeric IDs without registration, but generic names are rejected on Mobilis, so use a name that matches the brand. Numeric senders are delivered on a best effort basis and the sender ID may be changed, and Mobilis is expected to fail them. No short codes or two-way SMS.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Algeria) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory, phishing, gambling and other scam topics prohibited. Avoid generic alpha sender IDs; Mobilis rejects them. |

Last checked 30 September 2026 [Questions about Algeria?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Algeria)

### American Samoa · AS · Check with us

Messages can be sent with a long numeric sender, with no registration needed. Alphanumeric senders and short codes are not supported, and two-way SMS is not available. Phishing is not allowed.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20American%20Samoa) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing is prohibited. For toll free numbers, restricted categories include high-risk finance, debt collection, gambling, cryptocurrency, tobacco, controlled substances, adult content and scams. The euro symbol is not supported. |

Last checked 30 September 2026 [Questions about American Samoa?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20American%20Samoa)

### Andorra · AD · Confirmed

Alphanumeric and numeric senders can be used for Andorra with no registration. Short codes are also supported, but messages are one-way only.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Andorra?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Andorra)

### Angola · AO · Confirmed

Angola can be reached from outside the country with an alphanumeric or numeric sender ID and no registration. Registration (about 1 day) applies only to local traffic. Phishing content is prohibited.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited topic: phishing. URLs allowed. |

Last checked 30 September 2026 [Questions about Angola?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Angola)

### Anguilla · AI · Confirmed

Alphanumeric senders and long numbers can be used to send to Anguilla with no registration. Replies are not supported. Phishing and regulatory traffic is prohibited.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Anguilla?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Anguilla)

### Antarctica · AQ · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Antarctica).

### Antigua and Barbuda · AG · Confirmed

Alphanumeric sender IDs and long numbers can be used, and no registration is needed. Regulatory and phishing content is prohibited.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Regulatory and phishing content is prohibited. |

Last checked 30 September 2026 [Questions about Antigua and Barbuda?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Antigua%20and%20Barbuda)

### Argentina · AR · Check with us

Alphanumeric and numeric long code senders are not supported for Argentina. Traffic arrives from a numeric sender chosen by the network, so the customer sender ID will not show. Short codes are supported and two-way is available.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Argentina) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, scams, delivery phishing, gambling. |

Last checked 30 September 2026 [Questions about Argentina?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Argentina)

### Armenia · AM · Check with us

Alphanumeric sender IDs must be registered, which takes 20 days or more. From 3 December 2026, messages with unregistered sender IDs to Telecom (Beeline) and Viva Cell MTS are blocked. Sending is allowed Mon-Fri 10:00-21:00 recipient time only.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Armenia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, headquarters address, website, tax code, country, industry, estimated monthly volume, content sample, date. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | Mon-Fri 10:00-21:00 only, no sending on Saturday or Sunday. The time zone is taken from the recipient number. |
| Content restrictions | Person-to-person style messages, gambling, politics, drugs and adult content are forbidden. Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Armenia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Armenia)

### Aruba · AW · Confirmed

Aruba supports alphanumeric and numeric senders with no registration, and sender IDs arrive unchanged. Two-way SMS is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory content and phishing are prohibited. |

Last checked 30 September 2026 [Questions about Aruba?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Aruba)

### Ascension Island · AC · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Ascension%20Island).

### Australia · AU · Confirmed

Since 1 July 2026, alphanumeric sender IDs must be registered (about 20 days) and unregistered ones arrive as 'Unverified'. Long numbers work without registration and short codes are not available. Promotional messages need an opt-out.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company website, message example, Australia registration form (direct client or wholesale/partner/reseller version), evidence of a valid use case, proof of opt-in, gambling licence if gambling. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Opt-out | Mandatory for promotional traffic. Every message must include a low or no cost way to opt out, plus the sender's name and contact details. |
| Content restrictions | Prohibited: regulatory, gambling (licensed only), phishing, other scams, explicit content, delivery phishing. Adult and religious traffic is forbidden. Political traffic is exempt from marketing/spam rules. |

Last checked 30 September 2026 [Questions about Australia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Australia)

### Austria · AT · Check with us

Alphanumeric sender IDs must be registered (about 20 days, needs a Letter of Authorization). Long numbers are supported, but the sender may not arrive unchanged. Spam can get a sender ID deleted and block new registrations for one month.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Austria) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, ZIP code, email, country code, use case description, Austria Letter of Authorization |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing, other scams, gambling, explicit content. If spam is detected the regulator can delete the sender ID and block new registrations for one month. |

Last checked 30 September 2026 [Questions about Austria?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Austria)

### Azerbaijan · AZ · Confirmed

Azerbaijan can be reached from outside the country with an alphanumeric sender ID and no registration (registration, about 4 days, applies to local traffic only). Sending is limited to weekdays 08:00 to 16:00 recipient time, and numeric senders fail on Azercell.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Quiet hours | Monday to Friday 08:00 to 16:00 in the recipient's time zone. No sending on Saturday or Sunday, or on 1 January. |
| Content restrictions | Prohibited topics: regulatory, phishing, other scams, gambling. URLs allowed. Avoid generic alpha IDs such as InfoSMS, INFO, Verify, Notify. |

Last checked 30 September 2026 [Questions about Azerbaijan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Azerbaijan)

### Bahamas · BS · Check with us

You can send to the Bahamas from outside the country without registration, but the sender ID is overwritten with a numeric sender before it reaches the phone.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bahamas) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topic: phishing. URLs allowed. |

Last checked 30 September 2026 [Questions about Bahamas?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bahamas)

### Bahrain · BH · Confirmed

Alphanumeric sender IDs work without registration. Long numeric senders work for international traffic. Two-way SMS is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory, phishing, other scams and delivery phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Bahrain?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bahrain)

### Bangladesh · BD · Check with us

Messages can be sent from outside the country with a registered alphanumeric sender, which takes about 14 days. Since 8 September 2025, unregistered sender IDs are blocked on Grameenphone, Robi and Teletalk. Gambling, political, adult, religious and tobacco content is not allowed.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bangladesh) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 14 days. You will need: Company name, company website, headquarters address, message example. Documents: Grameenphone letter of authorization, sender ID registration form |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Gambling of all forms is forbidden. Political, adult, religious and tobacco content is not allowed. Also prohibited: regulatory, scams, phishing. |

Last checked 30 September 2026 [Questions about Bangladesh?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bangladesh)

### Barbados · BB · Confirmed

Alphanumeric and numeric senders can be used for Barbados with no registration. Two-way SMS is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Barbados?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Barbados)

### Belarus · BY · Confirmed

Alphanumeric sender IDs must be registered (20 days or more) before sending from outside Belarus, and unregistered senders do not work. Numeric senders and short codes are not supported. Content must match the sender ID, and person to person messages are blocked.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: International: company name, company registration number, website, industry, country, date, content sample |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, gambling. The message must relate to the sender ID and generic sender IDs are not allowed. Person to person messages are blocked. MTS Belarus may change registered senders to a generic one. |

Last checked 30 September 2026 [Questions about Belarus?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Belarus)

### Belgium · BE · Confirmed

Alphanumeric sender IDs are not supported. Send with a long number or short code, no registration needed, but the numeric sender may be overwritten on international traffic. Gambling is allowed only for licensed senders.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing, other scams, gambling. Gambling is allowed only for licensed traffic. |

Last checked 30 September 2026 [Questions about Belgium?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Belgium)

### Belize · BZ · Confirmed

Alphanumeric senders and long numbers can be used to send to Belize with no registration. Replies are not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Belize?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Belize)

### Benin · BJ · Check with us

Alphanumeric senders must be registered for Benin, which takes 20 days or more. Numeric senders fail on MTN, so alpha is the safe choice, and promotional content may not be registrable for MTN.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Benin) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, website, contact person, email and mobile number, content sample, estimated monthly volume, use case description (international route). Local route also needs company registration certificate, Letter of Authorization and RCCM certificate. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, other scams. Promotional content cannot be registered for MTN, and generic sender IDs risk being blocked. Numeric senders fail on MTN. |

Last checked 30 September 2026 [Questions about Benin?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Benin)

### Bermuda · BM · Confirmed

Alphanumeric and numeric senders can be used with no registration. Only Digicel keeps the sender ID; on other networks it is replaced with a random sender. Short codes are best avoided, and two-way SMS is not available.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Bermuda?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bermuda)

### Bhutan · BT · Confirmed

Alphanumeric and numeric senders can be used for Bhutan with no registration. Messages are one-way only, and delivery to B-Mobile is best effort.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Bhutan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bhutan)

### Bolivia · BO · Check with us

Alphanumeric senders and long numbers can be used, and sender registration is required (about 3 days, with website and content sample). Sender IDs are overwritten on most networks; only Viva (Nuevatel) shows the sender unchanged. Replies are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bolivia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 3 days. You will need: Company website and content sample. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Bolivia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bolivia)

### Bosnia and Herzegovina · BA · Check with us

Alphanumeric senders must be registered for Bosnia and Herzegovina. International registration takes about 1 day and needs company name, website and a message example. Numeric senders work on the international route but may be replaced with a generic alpha sender.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bosnia%20and%20Herzegovina) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 1 day. You will need: Company name, company website, message example (international route). Local route also needs use case description and a Letter of Authorization. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, other scams. |

Last checked 30 September 2026 [Questions about Bosnia and Herzegovina?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bosnia%20and%20Herzegovina)

### Botswana · BW · Check with us

Alphanumeric senders can be used with no registration from outside the country; registration (about 3 days) applies only to local traffic. Numeric senders are replaced on delivery, so alpha is recommended. Messages can only be sent Monday to Saturday, 8am to 7pm Botswana time.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Botswana) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | Mon to Sat 08:00 to 19:00, no sending on Sunday (UTC+2, Gaborone). |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Botswana?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Botswana)

### Bouvet Island · BV · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bouvet%20Island).

### Brazil · BR · Check with us

International senders cannot use alphanumeric IDs in Brazil, and all traffic is rewritten to a short code sender, so the sender ID will not arrive as sent. Two-way SMS works. Gambling (licensed only), political, religious, tobacco and adult content is banned.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Brazil) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Quiet hours | Marketing only 09:00-22:00 local time and not on Sundays. Brazil spans three time zones. |
| Content restrictions | Gambling only if licensed (whitelisting needed). Political, religious, tobacco, adult, controlled substance, cannabis, contest and telecom service promotion content not allowed. |

Last checked 30 September 2026 [Questions about Brazil?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Brazil)

### British Indian Ocean Territory · IO · Confirmed

Only numeric long code senders are supported for British Indian Ocean Territory, with no registration. Alphanumeric senders, short codes and two-way are not supported.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about British Indian Ocean Territory?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20British%20Indian%20Ocean%20Territory)

### British Virgin Islands · VG · Confirmed

Alphanumeric or long numeric senders can be used with no registration. Two-way SMS is not available, and short code use should be confirmed with us first.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about British Virgin Islands?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20British%20Virgin%20Islands)

### Brunei · BN · Confirmed

Alphanumeric sender IDs and international long numbers can be used with no registration. Replies (2-way) are not supported. Gambling and phishing content are prohibited.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing, gambling. |

Last checked 30 September 2026 [Questions about Brunei?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Brunei)

### Bulgaria · BG · Check with us

Bulgaria requires a registered alphanumeric sender ID, which takes 20 days or more. Numeric senders and short codes from abroad are not supported, and unregistered IDs are overwritten with a generic sender.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bulgaria) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, website, industry, estimated monthly volume, message example, use case description and opt-out setup. Documents: Letter of Authorization and Vivacom Bulgaria Originator Declaration. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | Marketing messages should include an opt-out by SMS, such as a phone number or unsubscribe link. |
| Content restrictions | Regulatory content, phishing and delivery phishing are prohibited. Operators will not register international brand sender IDs (Viber, Google, Microsoft and similar) as local. |

Last checked 30 September 2026 [Questions about Bulgaria?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Bulgaria)

### Burkina Faso · BF · Check with us

Alphanumeric senders and long numbers can be used. Sender registration is required (20+ days, with a letter of authorization). Replies are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Burkina%20Faso) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: International traffic: company name, message example, letter of authorization. Local traffic also needs business registration certificate, honor declaration form, sender purpose and use case. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Burkina Faso?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Burkina%20Faso)

### Burundi · BI · Check with us

Burundi can be reached from outside the country with an alphanumeric or numeric sender ID and no registration. Registration (about 15 days) applies to local traffic only. Regulatory and phishing content is prohibited.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Burundi) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Burundi?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Burundi)

### Cabo Verde · CV · Check with us

Alphanumeric sender IDs can be used with no registration, but generic sender IDs are blocked on the T+ network. Numeric senders are not reliable. No 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cabo%20Verde) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. Generic alphanumeric sender IDs are not allowed on the T+ network, so use a sender that matches the service. |

Last checked 30 September 2026 [Questions about Cabo Verde?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cabo%20Verde)

### Cambodia · KH · Check with us

Alphanumeric sender IDs must be registered (about 12 days for international traffic). The sender is overwritten on Metfone. Replies are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cambodia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 12 days. You will need: Company name, website, headquarters address, country, industry, estimated monthly volume, content sample in English, message example, and an appointment letter (for BFSI traffic, Smart Cambodia). |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, gambling, other scams, explicit content. |

Last checked 30 September 2026 [Questions about Cambodia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cambodia)

### Cameroon · CM · Check with us

Alphanumeric sender IDs must be registered, which takes 20 days or more. Promotional content cannot be registered and Google as a sender ID is prohibited. Two-way SMS is not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cameroon) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, website, contact person, email and mobile number, estimated monthly volume, use case description, message example and content sample (in English). Local traffic also needs a Cameroon Sender Registration form and proof of local presence. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Promotional content cannot be registered. Google as a sender ID is prohibited. Regulatory and phishing topics prohibited. Avoid generic sender IDs. |

Last checked 30 September 2026 [Questions about Cameroon?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cameroon)

### Canada · CA · Confirmed

Canada does not allow alphanumeric senders. Use a registered short code, 10DLC number or toll-free number; registration is per campaign and typically takes 3 to 8 weeks. Opt-in and opt-out are mandatory, and gambling and SHAFT content are banned.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, registration required. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Opt-out | Opt-out is mandatory. |
| Content restrictions | Gambling of all forms, SHAFT content (sex, hate, alcohol, firearms, tobacco), scams, phishing and explicit content are prohibited. Campaign drifting and snowshoeing are forbidden. Age gating is mandatory for restricted content. High-risk finance, debt collection, crypto, lead generation and cannabis are also forbidden. Short code SMS is limited to 160 ASCII characters. |

Last checked 30 September 2026 [Questions about Canada?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Canada)

### Caribbean Netherlands · BQ · Confirmed

Caribbean Netherlands supports alphanumeric, numeric and short code senders with no registration. Two-way SMS is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |

Last checked 30 September 2026 [Questions about Caribbean Netherlands?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Caribbean%20Netherlands)

### Cayman Islands · KY · Confirmed

Alphanumeric senders and long numbers can be used to send to the Cayman Islands with no registration. Replies are supported. No short codes.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Cayman Islands?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cayman%20Islands)

### Central African Republic · CF · Confirmed

Alphanumeric and numeric senders can be used for the Central African Republic with no registration. Messages are one-way only.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Central African Republic?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Central%20African%20Republic)

### Chad · TD · Confirmed

Alphanumeric senders can be used with no registration, and pre-registration is no longer offered. The ID must match your brand or service. Numeric senders are not supported, and two-way SMS is not available.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory content and phishing. Generic alphanumeric sender IDs are not allowed; the ID must match the brand, service or product. |

Last checked 30 September 2026 [Questions about Chad?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Chad)

### Chile · CL · Confirmed

Chile does not support alphanumeric senders; all traffic goes out from random numbers, so the sender ID is not preserved. Sending is only allowed Monday to Saturday in set hours (never Sunday). Domestic traffic needs a registered message example (about 7 days); international needs none.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | No |
| Quiet hours | Mon to Fri 08:30 to 19:30, Sat 09:00 to 14:00, no Sunday sends. Time zone UTC-3 Santiago. Chilean public holidays are also excluded. |
| Content restrictions | Regulatory content, scams and phishing are prohibited. Marketing is not allowed over domestic long codes, political messages are not allowed, and sending 10 messages within 60 seconds from one domestic long code is blocked. |

Last checked 30 September 2026 [Questions about Chile?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Chile)

### China · CN · Confirmed

China can be reached only with a numeric sender ID, and the signature and templates must be registered first (about 16 days, needs a mainland business license and a Chinese ID). Content rules are strict and delivery is best effort.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, registration required. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Signature and template whitelisting are mandatory, and the signature shows at the start of the message in brackets. International traffic needs URL whitelisting. Prohibited: gambling, scams, phishing, regulatory topics, finance marketing, political and adult content, and promotions for real estate, education and immigration. Blocking can happen without notice. |

Last checked 30 September 2026 [Questions about China?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20China)

### Christmas Island · CX · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Christmas%20Island).

### Cocos (Keeling) Islands · CC · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cocos%20(Keeling)%20Islands).

### Colombia · CO · Check with us

Colombia is reached through a shared short code with whitelisted message templates, taking about 5 days. Alphanumeric and numeric senders are not supported, and a numeric sender is overwritten with a short code. Sending is limited to 07:00 to 19:00 Mon to Fri and 08:00 to 15:00 Sat, and political content is not allowed.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Colombia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | No |
| Opt-out | An opt-out option is mandatory. |
| Quiet hours | Mon to Fri 07:00 to 19:00, Sat 08:00 to 15:00, no sending on Sunday. Bogota time (UTC-5). Also excluded: 1 Jan, 12 Jan, 12 Oct, 2 Nov, 16 Nov, 8 Dec, 25 Dec. |
| Content restrictions | Prohibited: regulatory, other scams, phishing, delivery phishing, explicit content. Gambling only if licensed. Political content is not allowed. Some protected senders, especially banks, may need a Letter of Authorization. |

Last checked 30 September 2026 [Questions about Colombia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Colombia)

### Comoros · KM · Confirmed

Comoros can be reached from outside the country with an alphanumeric sender ID and no registration. Numeric senders are fully supported only on Telma and are best effort on HURI, so use alphanumeric.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topic: phishing. URLs allowed. Concatenated (long) messages are not supported. |

Last checked 30 September 2026 [Questions about Comoros?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Comoros)

### Congo · CG · Check with us

Alphanumeric sender IDs must be registered for Congo, which takes about 16 days, and only non-promotional, non-generic IDs are accepted. Numeric senders are listed as supported but can be overwritten by the network, so use the registered alphanumeric ID.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Congo) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 16 days. You will need: Company name, website, contact person, email and mobile number, estimated monthly volume, message example, use case description. Alphanumeric IDs are the only type that needs registering, and MTN only supports pre-registered alphanumeric IDs. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | 07:00 to 16:30 UTC, every day. |
| Content restrictions | Prohibited: regulatory, phishing. Promotional content cannot be registered. Avoid generic sender IDs such as INFO, InfoSMS, Verify, Notify. |

Last checked 30 September 2026 [Questions about Congo?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Congo)

### Congo (Democratic Republic) · CD · Confirmed

The Democratic Republic of the Congo can be reached from outside the country with an alphanumeric sender ID and no registration (registration, about 11 days, applies to local traffic only). Numeric senders do not deliver on Airtel, so use alphanumeric.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: regulatory, phishing. Avoid generic alpha IDs such as InfoSMS, INFO, Verify, Notify. |

Last checked 30 September 2026 [Questions about Congo (Democratic Republic)?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Congo%20(Democratic%20Republic))

### Cook Islands · CK · Confirmed

Alphanumeric senders and long numbers can be used to send to the Cook Islands with no registration. No short codes and no replies.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Cook Islands?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cook%20Islands)

### Costa Rica · CR · Check with us

International traffic to Costa Rica can use a registered alphanumeric sender (about 5 days) or numeric senders. Numeric senders are overwritten with a short or long code, so the customer number will not show. Two-way is supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Costa%20Rica) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 5 days. You will need: Company name, address, region, website, tax code, contact person and mobile number, message example, opt-in method, use case description, and the transactional/promotional sender ID form. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing. |

Last checked 30 September 2026 [Questions about Costa Rica?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Costa%20Rica)

### Cote d'Ivoire · CI · Check with us

Alphanumeric sender IDs must be registered (about 8 days on the international route), and promotional content cannot be registered. Send only between 08:00 and 19:00 recipient time. Numeric senders are not reliable because MTN fails them. No 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cote%20d'Ivoire) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 8 days. You will need: International: company name, company website, estimated monthly volume, message example, use case description. Local traffic also needs company registration details, RCCM certificate and a Letter of Authorization. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | 08:00 to 19:00, Monday to Sunday, in the recipient's time zone |
| Content restrictions | Prohibited: phishing, other scams, regulatory. Promotional content cannot be registered (exception for domestic customers over 30,000 SMS a month). Google as a sender ID is prohibited. Avoid generic sender IDs like Info or Verify. |

Last checked 30 September 2026 [Questions about Cote d'Ivoire?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cote%20d'Ivoire)

### Croatia · HR · Check with us

International sends to Croatia work with an alphanumeric or numeric sender and no registration. On the A1 network an alphanumeric ID may be replaced with a generic one, so numeric senders keep the sender more reliably.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Croatia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, scams, phishing, explicit content, delivery phishing. |

Last checked 30 September 2026 [Questions about Croatia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Croatia)

### Cuba · CU · Check with us

Alphanumeric sender IDs must be registered, which takes 20 days or more and needs the CEO's passport details. Service to Cuba has been reported as discontinued by another provider, so contact us before sending.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cuba) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: CEO full name, CEO passport number, CEO email, company name, company website, service or brand name, country, date, content sample, use case description |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing prohibited. |

Last checked 30 September 2026 [Questions about Cuba?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cuba)

### Curacao · CW · Confirmed

Alphanumeric senders and long numbers can be used to send to Curacao with no registration. No short codes and no replies.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Curacao?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Curacao)

### Cyprus · CY · Check with us

Alphanumeric sender IDs must be registered with a message example, which takes about 1 day. Numeric sender IDs are not supported and are replaced with a generic alphanumeric sender. SMS to Northern Cyprus and two-way SMS are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cyprus) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 1 day. You will need: Message example. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory, phishing, delivery phishing and other scam topics prohibited. SMS to Northern Cyprus is not supported. |

Last checked 30 September 2026 [Questions about Cyprus?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Cyprus)

### Czech Republic · CZ · Check with us

The Czech Republic can be reached from outside the country with an alphanumeric sender ID, which must be registered first (about 15 days). Unregistered IDs are blocked on T-Mobile and O2.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Czech%20Republic) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 15 days. You will need: Company name, website, message example, service or brand name, use case description; Czech Republic originator declaration. |
| --- | --- |
| Numeric sender (a phone number) | Supported, registration required. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited topics: regulatory, phishing, other scams, delivery phishing, gambling. URLs allowed. Delivery to M2M numbers is best effort. |

Last checked 30 September 2026 [Questions about Czech Republic?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Czech%20Republic)

### Denmark · DK · Check with us

Alphanumeric sender IDs must be registered (about 6 days). Long numbers are supported. Gambling is allowed only for licensed senders.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Denmark) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 6 days. You will need: Company name, company website, country, industry, message example |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, other scams, gambling, delivery phishing, explicit content. Gambling only for licensed traffic. |

Last checked 30 September 2026 [Questions about Denmark?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Denmark)

### Diego Garcia · DG · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Diego%20Garcia).

### Djibouti · DJ · Confirmed

Alphanumeric or long numeric senders can be used with no registration. Two-way SMS is not available, and phishing is not allowed.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing prohibited. |

Last checked 30 September 2026 [Questions about Djibouti?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Djibouti)

### Dominica · DM · Check with us

Alphanumeric senders work in Dominica with no registration; avoid generic names like INFO or Verify. Long numbers are listed as supported but should be tested before promising them. Replies are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Dominica) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. Avoid generic alphanumeric IDs such as InfoSMS, INFO, Verify, Notify, which cause failures. |

Last checked 30 September 2026 [Questions about Dominica?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Dominica)

### Dominican Republic · DO · Confirmed

From outside the country, only short codes are supported; alphanumeric and long numeric senders are not. Sender IDs may be overwritten with a random short code, so the ID may not arrive unchanged.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Regulatory content, phishing and scams are prohibited. |

Last checked 30 September 2026 [Questions about Dominican Republic?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Dominican%20Republic)

### Ecuador · EC · Confirmed

Ecuador can be reached from outside the country with a numeric sender ID after registration (about 5 days). Alphanumeric senders are not supported except on CNT Mobile, and the numeric sender is overwritten. Sending is allowed on weekdays 09:00 to 18:00 only.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, registration required. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Quiet hours | Monday to Friday 09:00 to 18:00 Ecuador time (UTC-5). No sending on Saturday or Sunday. |
| Content restrictions | Prohibited topics: regulatory, phishing, delivery phishing. Movistar does not support concatenated SMS, so keep messages under 160 characters. Local traffic needs URL whitelisting and template registration over Claro. |

Last checked 30 September 2026 [Questions about Ecuador?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Ecuador)

### Egypt · EG · Check with us

International sends to Egypt work with an alphanumeric sender and no registration. International long codes are supported, but Etisalat replaces them with a generic alphanumeric sender. Marketing messages must avoid 21:00 to 09:00 and Fridays, Saturdays and holidays.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Egypt) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | Marketing messages are not allowed between 21:00 and 09:00 Egypt time (UTC+2), nor on Fridays, Saturdays or official holidays. |
| Content restrictions | Prohibited: regulatory, phishing, scams, gambling, political, medicine/drug, religious, adult, alcohol and tobacco content. Some sender IDs are denylisted on Orange Egypt (for example Google, Facebook, Meta, Microsoft, VerifyOTP). Generic text is often rejected on Etisalat, so include the brand name. |

Last checked 30 September 2026 [Questions about Egypt?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Egypt)

### El Salvador · SV · Check with us

From outside the country, El Salvador supports long numeric senders, but the sender ID is overwritten. Alphanumeric and short code senders are not supported. International traffic needs registration, about 5 days.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20El%20Salvador) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Regulatory content, phishing and delivery phishing are prohibited. |

Last checked 30 September 2026 [Questions about El Salvador?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20El%20Salvador)

### Equatorial Guinea · GQ · Confirmed

Alphanumeric and numeric senders can be used for Equatorial Guinea with no registration. Messages are one-way only.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Equatorial Guinea?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Equatorial%20Guinea)

### Eritrea · ER · Confirmed

Alphanumeric sender IDs and long numbers can be used with no registration. No 2-way. Little detail is published for this country.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Eritrea?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Eritrea)

### Estonia · EE · Confirmed

Alphanumeric and numeric senders can be used for Estonia with no registration, and two-way is supported. Short codes are also supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, other scams, delivery phishing. Delivery to M2M numbers is best effort. |

Last checked 30 September 2026 [Questions about Estonia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Estonia)

### Eswatini · SZ · Check with us

Alphanumeric senders must be registered for Eswatini, which takes about 16 days. Promotional content cannot be registered, and generic sender names should be avoided.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Eswatini) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 16 days. You will need: Company name, contact person, email and mobile number, estimated monthly volume, message example, use case description (international route). Local route also needs website. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing. Promotional content cannot be registered. Avoid generic sender IDs such as INFO or Verify. |

Last checked 30 September 2026 [Questions about Eswatini?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Eswatini)

### Ethiopia · ET · Confirmed

Ethiopia requires a registered alphanumeric sender ID (about 1 day for international traffic). From 8 October 2026, Ethio Telecom will block messages with unregistered IDs. Numeric senders and short codes are not supported.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 1 day. You will need: International: company name and message example. Local: company name, contact details, message example, use case, plus business licence, registration certificate and letter of authorization (9 days). |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Local banking and promotional traffic are forbidden. Regulatory content, phishing and scams are prohibited. |

Last checked 30 September 2026 [Questions about Ethiopia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Ethiopia)

### Falkland Islands · FK · Confirmed

Alphanumeric senders can be used for the Falkland Islands with no registration. Numeric senders, short codes and two-way are not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Falkland Islands?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Falkland%20Islands)

### Faroe Islands · FO · Confirmed

Alphanumeric or long numeric senders can be used with no registration. Short codes and two-way SMS are not available.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Faroe Islands?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Faroe%20Islands)

### Fiji · FJ · Confirmed

Fiji can be reached from outside the country with an alphanumeric sender ID and no registration. Numeric senders only arrive unchanged on Vodafone Fiji.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: phishing, regulatory. Avoid generic alpha IDs such as InfoSMS, INFO, Verify, Notify. |

Last checked 30 September 2026 [Questions about Fiji?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Fiji)

### Finland · FI · Check with us

Alphanumeric sender IDs must be pre-approved by the Finnish operators (DNA, Elisa and Telia), which takes 20 days or more. Since 4 May 2026 unregistered IDs are replaced with 'Tuntematon' (Unknown), and from 2 November 2026 they will be replaced with 'Roskaposti' (Spam). Messages must include an opt-out and gambling and lottery content is banned.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Finland) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, website, use case description, relationship between company and sender ID, direct contract, Traficom registration. Sender IDs must be pre-approved by DNA, Elisa and Telia. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | An opt-out option must be included in the message. |
| Content restrictions | Gambling and lottery content prohibited. Phishing, scam, regulatory and explicit content prohibited. Some protected sender IDs need a Letter of Authorization and Traficom numbering decision. |

Last checked 30 September 2026 [Questions about Finland?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Finland)

### France · FR · Check with us

Alphanumeric sender IDs can be used with no registration. Numeric senders do not work from abroad. Marketing messages need an opt-out in the text and must go out between 08:00 and 21:30 Paris time.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20France) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | Marketing messages must include an opt-out in the text (STOP plus a short code, or a web link). A mobile number must not be used. If none is found, the gateway appends 'STOP AU' plus its short code. |
| Quiet hours | 08:00 to 21:30 Paris time, Monday to Sunday. Transactional messages are exempt. |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing, other scams, explicit content, gambling (licensed only). No special characters in alphanumeric IDs, avoid generic IDs (SMS, Info, Help, Support). Some sensitive IDs may need a Letter of Authorization. NRJ Mobile and Truphone overwrite the sender with random short codes. Energy-saving housing offers by SMS are prohibited from 1 July 2025. Adult and cannabis content prohibited. |

Last checked 30 September 2026 [Questions about France?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20France)

### French Guiana · GF · Confirmed

Alphanumeric senders can be used for French Guiana with no registration. Numeric senders are accepted but may be overwritten with a short code or generic alpha sender, and the euro sign needs UCS-2 encoding on some networks.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, other scams, delivery phishing, gambling, explicit content. The euro sign is not supported on Outremer Telecom and Digicel unless UCS-2 encoding is used. |

Last checked 30 September 2026 [Questions about French Guiana?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20French%20Guiana)

### French Polynesia · PF · Confirmed

Alphanumeric or long numeric senders can be used with no registration. Two-way SMS is not available, and short code use should be confirmed with us first.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about French Polynesia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20French%20Polynesia)

### French Southern Territories · TF · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20French%20Southern%20Territories).

### Gabon · GA · Confirmed

Alphanumeric senders and long numbers work for international traffic with no registration. There is no working connection for local (in-country) traffic. On Airtel, numeric senders are replaced with a generic alphanumeric ID. No replies.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. Avoid generic alphanumeric IDs such as InfoSMS, INFO, Verify, Notify. |

Last checked 30 September 2026 [Questions about Gabon?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Gabon)

### Gambia · GM · Check with us

Gambia supports alphanumeric senders, which must be registered (about 15 days), and long numeric senders. Numeric IDs are rejected on the Comium network, so alphanumeric is safer.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Gambia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 15 days. You will need: International: company name, address, website, contact person and role, email, phone numbers, industry, message example, use case and business licence. Takes about 15 days. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory content and phishing are prohibited. Since 4 September 2026, Africell, Comium and Qcell mobile numbers have 9 digits (prefix 87, 86 and 83 after the 220 country code); Gamcel numbers are unchanged. |

Last checked 30 September 2026 [Questions about Gambia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Gambia)

### Georgia · GE · Confirmed

Georgia can be reached from outside the country with an alphanumeric sender ID and no registration. Numeric senders work for local traffic only (registration about 5 days).

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited topics: regulatory, phishing, other scams. URLs allowed. |

Last checked 30 September 2026 [Questions about Georgia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Georgia)

### Germany · DE · Confirmed

Alphanumeric and numeric senders can be used for Germany with no registration, and two-way is supported. Gambling, explicit and cannabis content is prohibited.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, explicit content, phishing, delivery phishing, other scams, gambling, cannabis. Delivery to M2M numbers is best effort. Short codes take 6 to 8 weeks to provision. |

Last checked 30 September 2026 [Questions about Germany?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Germany)

### Ghana · GH · Check with us

Alphanumeric sender IDs must be registered, which takes 20 days or more from outside the country. Since 8 July 2026, unregistered IDs are blocked on MTN. Numeric senders fail on Airtel, MTN and Glo, so alpha is recommended, and messages can only be sent 8am to 8pm recipient time.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Ghana) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, website, contact person, email and mobile, English content sample, estimated monthly volume, message example, use case. Document: Ghana sender ID registration form |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Quiet hours | 08:00 to 20:00 every day, in the recipient's time zone. |
| Content restrictions | Prohibited: regulatory content, scams and phishing. Promotional content cannot be registered as an alphanumeric sender. Only a limited GSM-7 character set is supported (letters, digits and %&'()*+,-./:;?#); other characters are replaced or removed. Generic sender IDs should be avoided. Numeric senders fail on Airtel, MTN and Glo. |

Last checked 30 September 2026 [Questions about Ghana?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Ghana)

### Gibraltar · GI · Confirmed

Alphanumeric sender IDs and long numbers can be used with no registration. Short codes and 2-way are not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Gibraltar?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Gibraltar)

### Greece · GR · Confirmed

Alphanumeric senders can be used for Greece with no registration, and the sender arrives unchanged. Numeric long codes are not supported for international traffic. Avoid generic sender IDs.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, scams, phishing, gambling. Avoid generic alphanumeric IDs, which local operators tend to block. |

Last checked 30 September 2026 [Questions about Greece?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Greece)

### Greenland · GL · Confirmed

Alphanumeric senders and international long numbers can be used to send to Greenland with no registration. No short codes and no replies.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. Avoid generic alphanumeric sender IDs. |

Last checked 30 September 2026 [Questions about Greenland?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Greenland)

### Grenada · GD · Confirmed

Alphanumeric and long numeric senders work without registration, and two-way SMS is supported. Regulatory and phishing content is prohibited.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Grenada?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Grenada)

### Guadeloupe · GP · Confirmed

Guadeloupe can be reached from outside the country with an alphanumeric sender ID and no registration. Numeric senders are overwritten with a short code or a generic alphanumeric sender.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited topics: regulatory, phishing, delivery phishing, gambling, explicit content, other scams. The euro sign is not supported unless UCS-2 encoding is used. Outbound length: GSM 160, Unicode 70. |

Last checked 30 September 2026 [Questions about Guadeloupe?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Guadeloupe)

### Guam · GU · Confirmed

Alphanumeric senders do not work in Guam; use a numeric sender, with no registration. Guam operators do not fully support US long codes and toll-free numbers, so the sender is usually overwritten and replies are not supported.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. Toll-free rules also bar high-risk financial services, gambling, cannabis, tobacco, adult content and similar. The euro symbol is not supported. |

Last checked 30 September 2026 [Questions about Guam?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Guam)

### Guatemala · GT · Check with us

Alphanumeric sender IDs must be registered (20 days or more, with a form and company details). Sender IDs may be overwritten with a short code or random number. No 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Guatemala) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: International: company name, address, region, website, contact person, contact mobile number, tax code, use case description, content sample, message example, opt-in method, plus the sender ID form (transactional and promotional) |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing. |

Last checked 30 September 2026 [Questions about Guatemala?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Guatemala)

### Guernsey · GG · Confirmed

Alphanumeric and numeric senders can be used for Guernsey with no registration. Two-way is supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Guernsey?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Guernsey)

### Guinea · GN · Confirmed

Only alphanumeric sender IDs are supported, and they must be registered, which takes about 2 days for international traffic. Promotional content is not allowed, generic IDs such as INFO or Verify should be avoided, and unregistered IDs are not allowed on MTN. No numeric, short code or two-way SMS.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 2 days. You will need: Company name, contact person, email and mobile number, estimated monthly volume, use case description, message example. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Promotional content is not allowed for registered sender IDs. Avoid generic IDs like INFO or Verify. Unregistered alpha IDs are not allowed on MTN. Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Guinea?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Guinea)

### Guinea-Bissau · GW · Check with us

Guinea-Bissau requires a registered alphanumeric sender ID, which takes about 11 days. Numeric senders are listed as supported but fail on the MTN network, so alphanumeric is the safer choice.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Guinea-Bissau) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 11 days. You will need: Company name, contact person, email and mobile number, estimated monthly volume, message example, use case description. Takes about 11 days. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory content and phishing are prohibited. Generic sender IDs such as INFO or Verify should be avoided because operators block them. |

Last checked 30 September 2026 [Questions about Guinea-Bissau?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Guinea-Bissau)

### Guyana · GY · Confirmed

Alphanumeric and long numeric senders work without registration. No two-way SMS.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Guyana?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Guyana)

### Haiti · HT · Check with us

Alphanumeric sender IDs must be registered for sending from outside the country, which takes about 4 days. Numeric senders also work. Two-way SMS is not available, and gambling and phishing content is not allowed.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Haiti) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 4 days. You will need: Company website, content sample, headquarters address, service or brand name |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, gambling. |

Last checked 30 September 2026 [Questions about Haiti?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Haiti)

### Holy See · VA · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Holy%20See).

### Honduras · HN · Confirmed

Alphanumeric senders must be registered for Honduras, which takes 20 days or more. Unregistered alpha and numeric senders may be overwritten with a local number, and on Claro alpha only works if registered.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, region, website, contact person and mobile, tax code, content sample, message example, use case, opt-in method, and a completed sender ID form (Form_Transactional_and_Promotional_[SenderID].docx). |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing. On Claro, alphanumeric senders only work if pre-registered. |

Last checked 30 September 2026 [Questions about Honduras?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Honduras)

### Hong Kong · HK · Check with us

Hong Kong can be reached with a registered alphanumeric sender ID (20+ days, needs a business license and letter of authorization). URLs are not allowed and marketing messages must include an unsubscribe phone number.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Hong%20Kong) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, website, estimated monthly volume, industry, message example; business license and a Hong Kong letter of authorization (a separate one for sender IDs with the # prefix). Takes 20+ days. Sender IDs with a # prefix must also be registered with OFCA. |
| --- | --- |
| Numeric sender (a phone number) | Supported, registration required. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | Marketing messages must include a phone number the recipient can call to unsubscribe. |
| Quiet hours | 09:00 to 23:00 every day, recipient time zone. |
| Content restrictions | URLs are not allowed. Prohibited: phishing, regulatory, other scams, gambling, firearms, adult content, loans, political, religious, controlled substances, cannabis and alcohol. Messages to do-not-call numbers are delivered on a best-effort basis. |

Last checked 30 September 2026 [Questions about Hong Kong?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Hong%20Kong)

### Hungary · HU · Confirmed

Alphanumeric sender IDs are not supported: whatever is sent is replaced with a local numeric sender. Long numbers work with no registration but are also replaced with a local number. Short codes are not supported.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing, other scams. |

Last checked 30 September 2026 [Questions about Hungary?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Hungary)

### Iceland · IS · Confirmed

Alphanumeric senders and long numbers can be used to send to Iceland with no registration. Gambling and lottery content is prohibited. No replies.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing, and gambling and lottery content. |

Last checked 30 September 2026 [Questions about Iceland?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Iceland)

### India · IN · Confirmed

Messages from outside India need no DLT registration, but the sender is replaced by a random short number. To show a branded sender, the customer must register on the DLT platform and use the domestic route. Gambling (OTP only), political and adult content is restricted.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Quiet hours | 10:00 to 21:00 every day, in the recipient's time zone. |
| Content restrictions | Gambling: only OTP messages allowed. Political and adult content not allowed. Also prohibited: firearms, money or loan, religious, controlled substances, cannabis and alcohol content. Shortened URLs are not allowed. |

Last checked 30 September 2026 [Questions about India?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20India)

### Indonesia · ID · Check with us

Alphanumeric sender IDs must be registered (about 20 days) and unregistered traffic is blocked on major networks. Numeric senders are listed as supported but are overwritten. Registered IDs need steady volume or they may be removed.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Indonesia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, registration number, tax code, website, industry, estimated monthly volume, content sample and message example, service or brand name, signatory name and title, and a letter of authorization for Telkomsel, XL and Smartfren. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, all gambling, scams, phishing, explicit, racial, adult and religious content. Also not allowed: firearms, political, controlled substances, cannabis and alcohol. Domestic sender messages must include a brand or service name in the body. Avoid phone numbers in the body. Avoid generic sender IDs. |

Last checked 30 September 2026 [Questions about Indonesia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Indonesia)

### Iran · IR · Check with us

Alphanumeric sender IDs must be registered on the international route (about 3 days, with templates and company details). Delivery to Iran may not be available, so contact us before sending.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Iran) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 3 days. You will need: International: company name, company website, country, estimated monthly volume, and approved templates |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, gambling, phishing. |

Last checked 30 September 2026 [Questions about Iran?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Iran)

### Iraq · IQ · Check with us

Alphanumeric sender IDs must be registered for sending from outside the country, which takes about 3 days. Alpha is recommended over numeric, since numeric senders fail on Asiacell and Zain and are overwritten on Korek. Two-way SMS is not available.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Iraq) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 3 days. You will need: Company name, company website, headquarters address, message example |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory content, phishing and gambling. Numeric senders fail on Asiacell and Zain and are overwritten with a generic alphanumeric sender on Korek. |

Last checked 30 September 2026 [Questions about Iraq?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Iraq)

### Ireland · IE · Check with us

Ireland requires alphanumeric sender IDs to be registered with ComReg and through realay, which takes about 3 days. Unregistered IDs are shown to recipients as Likely Scam, and generic IDs are blocked.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Ireland) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 3 days. You will need: Register the alphanumeric sender ID with the regulator ComReg as well as through realay. The organisation name must match the ComReg portal. Takes about 3 days. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Scams, phishing, delivery phishing, regulatory and explicit content are prohibited. Cannabis content is prohibited. Generic IDs (INFO, SMS, Verify and similar) are blocked. Protected sender IDs may need a letter of authorization. Since 3 July 2025, unregistered alphanumeric IDs are shown as Likely Scam, and blocking is planned later. |

Last checked 30 September 2026 [Questions about Ireland?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Ireland)

### Isle of Man · IM · Confirmed

The Isle of Man can be reached from outside the country with an alphanumeric or numeric sender ID and no registration. Phishing content is prohibited.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topic: phishing. URLs allowed. |

Last checked 30 September 2026 [Questions about Isle of Man?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Isle%20of%20Man)

### Israel · IL · Confirmed

International senders can use alphanumeric IDs without registration and they arrive as sent. Numeric senders work but are replaced with a generic ID on Golan and Azi networks. Two-way SMS is supported. Gambling, politics, drugs and adult content are banned.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Gambling, politics, drugs, pornography and adult content prohibited. Regulatory, phishing and scam topics prohibited. Local fixed-line numbers as sender IDs are rejected. |

Last checked 30 September 2026 [Questions about Israel?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Israel)

### Italy · IT · Check with us

Italy supports alphanumeric senders from outside the country with no registration. Marketing and promotional messages are barred from 22:00 to 08:00 and on Sundays, and cannabis content is prohibited.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Italy) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Quiet hours | No marketing or promotional messages from 22:00 to 08:00, or all day Sunday. No time zone is given. |
| Content restrictions | Cannabis content is prohibited. Regulatory, scam, phishing, delivery phishing and explicit content are prohibited. Banking and other protected sender IDs may need a letter of authorization. Gambling is listed as prohibited but also noted as allowed, so confirm before sending gambling traffic. |

Last checked 30 September 2026 [Questions about Italy?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Italy)

### Jamaica · JM · Confirmed

Jamaica can be reached from outside the country with an alphanumeric or numeric sender ID and no registration.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: regulatory, phishing, other scams. URLs allowed. |

Last checked 30 September 2026 [Questions about Jamaica?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Jamaica)

### Japan · JP · Check with us

Japanese networks accept numeric senders only, so an alphanumeric sender is converted to a number by default. Keeping the alphanumeric sender is possible on selected connections and may cost extra. International sender registration is required and takes 20+ days.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Japan) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: International: company name, website, country, estimated monthly volume, message example. Takes 20+ days. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: phishing, scams, regulatory, gambling (all forms), delivery phishing, firearms, adult, money/loan, lead generation, political, religious, controlled substance, cannabis and alcohol content. Phone numbers in the message text are not allowed. On KDDI, messages over 5 segments may be delayed, and international numeric senders get a 010 prefix. |

Last checked 30 September 2026 [Questions about Japan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Japan)

### Jersey · JE · Confirmed

Alphanumeric sender IDs and mobile numeric senders work without registration. Short codes are supported. Two-way SMS is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing and other scam topics prohibited. For international sending, use a mobile number rather than a local number. |

Last checked 30 September 2026 [Questions about Jersey?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Jersey)

### Jordan · JO · Confirmed

Alphanumeric senders must be registered for Jordan, which takes about 7 days on the international route. Promotional messages need the "adv" prefix and cannot go out on Friday, Saturday or late evening.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 7 days. You will need: Company name, address, website, message example, and URL used in the SMS (international route). |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | Mon to Thu and Sun 07:00 to 21:00 Amman time (UTC+3). No sending on Friday or Saturday, and also excluded 27 Sep and 25 Dec. Promotional messages are not allowed after 21:00. |
| Content restrictions | Prohibited: regulatory, phishing, other scams, delivery phishing. Promotional alpha senders must start with "adv" (for example "adv xxxx"). Zain and Orange block generic sender IDs. Numeric senders are overwritten with a generic alpha sender. |

Last checked 30 September 2026 [Questions about Jordan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Jordan)

### Kazakhstan · KZ · Check with us

Kazakhstan requires a registered alphanumeric sender ID, which takes about 16 days for international traffic. Messages cannot contain URLs, and sending is limited to 09:00 to 21:00 (UTC+5).

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kazakhstan) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 16 days. You will need: International: company name, address, headquarters address, website, tax code, industry, use case description, message example, content sample, and a link to the app or website for OTP. Takes about 16 days (8 days for local traffic). |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Quiet hours | Send window 09:00 to 21:00 every day, UTC+5. |
| Content restrictions | No URLs are allowed in messages. Gambling, bookmaker and sweepstake promotions are banned (OTP only). Religious content is banned. Regulatory content, phishing and scams are prohibited. |

Last checked 30 September 2026 [Questions about Kazakhstan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kazakhstan)

### Kenya · KE · Confirmed

Only registered alphanumeric sender IDs can be used, which takes about 12 days and needs a company registration certificate and tax code. Numeric and short code senders are not available from outside the country. Messages can only be sent 8am to 6pm recipient time, and proof of opt-in is required.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 12 days. You will need: Company name, website, country, tax code, estimated monthly volume, English content sample, message example, use case. Document: company registration certificate |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Opt-out | Opt-out is mandatory. Subscribers can opt out of all promotional broadcasts or per sender ID, and promotional messages to them fail. |
| Quiet hours | 08:00 to 18:00 every day, in the recipient's time zone. |
| Content restrictions | Prohibited: adult, political, person-to-person messaging, phishing and delivery phishing. Gambling only if licensed. Generic sender IDs such as INFO or Verify should be avoided. |

Last checked 30 September 2026 [Questions about Kenya?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kenya)

### Kiribati · KI · Confirmed

Kiribati supports alphanumeric and long numeric senders with no registration. Short codes and two-way SMS are not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing and regulatory content are prohibited. |

Last checked 30 September 2026 [Questions about Kiribati?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kiribati)

### Kosovo · XK · Check with us

Alphanumeric senders can be used for Kosovo with no registration, and short codes and two-way are supported. Numeric senders are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kosovo) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: phishing, regulatory, other scams. |

Last checked 30 September 2026 [Questions about Kosovo?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kosovo)

### Kuwait · KW · Check with us

Alphanumeric sender IDs must be registered (20 days or more, with business documents). Since 15 September 2026, unregistered senders are blocked on Zain and Ooredoo. No links are allowed in international traffic, and messages can be sent only between 07:00 and 23:00 Kuwait time.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kuwait) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, city, ZIP code, website, contact person, contact email, country, message example. Documents: business registration certificate, transactional acknowledgement letter, Ooredoo Non Objection Certificate. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Opt-out | Promotional and marketing messages must include opt-out instructions. |
| Quiet hours | 07:00 to 23:00 Kuwait time (UTC+3), every day |
| Content restrictions | Prohibited: regulatory, phishing, other scams, gambling, political, adult and spam content. Links are not allowed in international traffic. Promotional sender IDs must contain the letters AD. Numbers on the do-not-disturb registry cannot be reached. |

Last checked 30 September 2026 [Questions about Kuwait?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kuwait)

### Kyrgyzstan · KG · Check with us

Alphanumeric sender IDs can be used with no registration. Numeric senders are unreliable because Megacom replaces them. No 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kyrgyzstan) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, gambling. Megacom does not support numeric sender IDs. |

Last checked 30 September 2026 [Questions about Kyrgyzstan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Kyrgyzstan)

### Laos · LA · Confirmed

Alphanumeric and long numeric senders work without registration. Numeric senders are overwritten with a generic ID on Unitel, so alphanumeric is the safer choice. No short codes or two-way SMS.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Only A-Z, a-z and 0-9 are guaranteed to be kept intact; other characters may be removed or replaced, so use UCS-2 for Lao script. Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Laos?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Laos)

### Latvia · LV · Confirmed

Latvia can be reached from outside the country with an alphanumeric or numeric sender ID and no registration.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited topics: regulatory, phishing, other scams, delivery phishing. URLs allowed. Delivery to M2M numbers is best effort. |

Last checked 30 September 2026 [Questions about Latvia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Latvia)

### Lebanon · LB · Confirmed

Lebanon can be reached from outside the country with an alphanumeric sender ID and no registration (local traffic needs registration, about 2 days). A numeric sender is overwritten with a generic alphanumeric ID and is best effort, so use alphanumeric.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: regulatory, phishing, gambling. URLs allowed. Message length 160 characters. |

Last checked 30 September 2026 [Questions about Lebanon?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Lebanon)

### Lesotho · LS · Check with us

Sender registration is required (20+ days, with company name, industry and message example). The sender ID may be replaced with a short or long code, so recipients may not see the registered name. Replies are supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Lesotho) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, industry, message example. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing. Links are not allowed in local traffic (allowed for international). Avoid generic sender IDs such as INFO or Verify, which operators filter. |

Last checked 30 September 2026 [Questions about Lesotho?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Lesotho)

### Liberia · LR · Check with us

Alphanumeric sender IDs must be registered (about 3 days), and promotional content cannot be registered. Numeric senders fail on MTN. No 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Liberia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 3 days. You will need: Company name, contact person, contact email, contact mobile number, estimated monthly volume, message example, use case description |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. Promotional content cannot be registered. Avoid generic sender IDs like Info or Verify. |

Last checked 30 September 2026 [Questions about Liberia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Liberia)

### Libya · LY · Check with us

Alphanumeric senders must be registered for Libya, which takes about 1 day. Numeric senders and short codes are also listed as supported. Generic sender names are heavily filtered by operators.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Libya) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 1 day. You will need: Company name, company website, message example. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. Generic alpha sender IDs are heavily filtered by operators. |

Last checked 30 September 2026 [Questions about Libya?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Libya)

### Liechtenstein · LI · Confirmed

Alphanumeric and numeric senders can be used for Liechtenstein with no registration. Two-way is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Liechtenstein?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Liechtenstein)

### Lithuania · LT · Confirmed

Lithuania supports alphanumeric and numeric senders with no registration, and sender IDs arrive unchanged. Two-way SMS is supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Regulatory content, phishing, scams and gambling are prohibited. |

Last checked 30 September 2026 [Questions about Lithuania?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Lithuania)

### Luxembourg · LU · Check with us

Alphanumeric and long numeric senders are supported and two-way SMS works. Sender registration is required, taking about 1 day with an English content sample, but which sender types it covers is not confirmed.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Luxembourg) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, contact us about registration. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Regulatory, phishing, other scam and delivery phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Luxembourg?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Luxembourg)

### Macao · MO · Confirmed

Alphanumeric senders and international long numbers can be used to send to Macao with no registration. Replies are not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Macao?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Macao)

### Madagascar · MG · Confirmed

Alphanumeric and long numeric senders work without registration, but Telma Mobile may overwrite alpha IDs and Airtel and Orange overwrite numeric IDs. Generic names should be avoided. No two-way SMS.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Avoid generic alpha IDs such as INFO, Verify and Notify. Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Madagascar?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Madagascar)

### Malawi · MW · Check with us

Alphanumeric senders work for international traffic with no registration (registration applies only to local traffic). Long numbers are listed as supported but may not be delivered reliably, so prefer alphanumeric. Promotional messages only between 8am and 5pm local time. No replies.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Malawi) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | Promotional SMS must not be sent between 5pm and 8am local time (UTC+2). |
| Content restrictions | Prohibited: regulatory, phishing. Avoid generic sender IDs such as InfoSMS, INFO, Verify, Notify. |

Last checked 30 September 2026 [Questions about Malawi?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Malawi)

### Malaysia · MY · Check with us

Alphanumeric sender IDs are not supported in Malaysia, and the sender is overwritten with a random operator-approved number, so customers cannot control what recipients see. Every message must start with 'RM0.00' and include the brand name, and links and phone numbers are blocked. No marketing between 8PM and 8AM.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Malaysia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Quiet hours | No marketing or promotional messages between 8PM and 8AM. |
| Content restrictions | Start every message with 'RM0.00' (or 'RM0') and include the brand name; generic messages are not allowed. URLs, phone numbers and requests for personal information are blocked. Gambling, firearms, adult, loan, political, religious, controlled substance, cannabis and alcohol content banned. Banking OTP by SMS is restricted. |

Last checked 30 September 2026 [Questions about Malaysia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Malaysia)

### Maldives · MV · Check with us

Alphanumeric sender IDs can be used with no registration. Use a genuine brand name, not a generic one, because Dhivehi blocks numeric and generic senders. No 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Maldives) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, other scams. The Dhivehi network (472-01) only accepts genuine alphanumeric sender IDs and blocks numeric or generic ones. |

Last checked 30 September 2026 [Questions about Maldives?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Maldives)

### Mali · ML · Confirmed

International sends to Mali work with an alphanumeric sender and no registration, and the alpha ID arrives unchanged. International numeric senders are not preserved. Gambling and WhatsApp-branded content is restricted.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, gambling. Orange Mali blocks WhatsApp brand traffic; 1xbet, Melbet and Betwinner traffic only goes through a special connection. |

Last checked 30 September 2026 [Questions about Mali?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Mali)

### Malta · MT · Confirmed

Alphanumeric and numeric senders can be used for Malta with no registration. Two-way is supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, scams. |

Last checked 30 September 2026 [Questions about Malta?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Malta)

### Marshall Islands · MH · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Marshall%20Islands).

### Martinique · MQ · Confirmed

Alphanumeric and long numeric senders work without registration, and two-way SMS is supported. Gambling, explicit content, scams and phishing are banned.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Gambling, explicit content, scams, phishing and regulatory topics prohibited. |

Last checked 30 September 2026 [Questions about Martinique?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Martinique)

### Mauritania · MR · Confirmed

Mauritania can be reached from outside the country with an alphanumeric sender ID and no registration (local traffic needs registration, about 6 days). Numeric senders fail on Chinguitel, so use alphanumeric.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: phishing, regulatory. Avoid generic alpha IDs such as InfoSMS, INFO, Verify, Notify. |

Last checked 30 September 2026 [Questions about Mauritania?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Mauritania)

### Mauritius · MU · Confirmed

Alphanumeric or long numeric senders can be used from outside the country with no registration; registration applies only to local traffic. Two-way SMS is not available.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Mauritius?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Mauritius)

### Mayotte · YT · Confirmed

Alphanumeric sender IDs, long numbers and short codes can be used with no registration, and 2-way works.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: phishing, regulatory, delivery phishing, gambling, explicit content, other scams. |

Last checked 30 September 2026 [Questions about Mayotte?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Mayotte)

### Mexico · MX · Check with us

Mexico requires a registered alphanumeric sender ID (20 days or more), and short codes work too. Numeric long codes are not supported, and unregistered alpha IDs are replaced with a shared short code. Sending is limited to 08:00 to 20:00.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Mexico) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, website, headquarters address, industry, use case, message example, opt-in and opt-out methods, privacy policy, terms and conditions, delivery schedule, relationship between company and sender. Takes 20 days or more. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | Promotional messages need clear opt-out instructions. |
| Quiet hours | 08:00 to 20:00 every day, UTC-6 Mexico City. |
| Content restrictions | Regulatory content, phishing, delivery phishing, scams and explicit content are prohibited. Firearms, gambling, loans, lead generation, cannabis and alcohol content is also prohibited, and election or political marketing is blocked. Registered domestic IDs should use Spanish text. Avoid international brand names (WhatsApp, Facebook) with unregistered IDs. |

Last checked 30 September 2026 [Questions about Mexico?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Mexico)

### Micronesia · FM · Check with us

Alphanumeric and numeric senders are supported for Micronesia with no registration. Short codes and two-way SMS are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Micronesia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing, regulatory. |

Last checked 30 September 2026 [Questions about Micronesia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Micronesia)

### Moldova · MD · Confirmed

Alphanumeric sender IDs and international long numbers can be used with no registration. No 2-way.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Moldova?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Moldova)

### Monaco · MC · Confirmed

Alphanumeric or long numeric senders can be used with no registration. Two-way SMS is not available, and phishing is not allowed.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing prohibited. |

Last checked 30 September 2026 [Questions about Monaco?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Monaco)

### Mongolia · MN · Check with us

Alphanumeric sender IDs can be used with no registration. International long numbers no longer work on G-Mobile and Mobicom, so avoid numeric senders. No short codes or 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Mongolia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Mongolia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Mongolia)

### Montenegro · ME · Check with us

Alphanumeric sender IDs must be registered (about 17 days for international traffic). Numeric senders are not supported. Send only between 08:00 and 20:00 recipient time.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Montenegro) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 17 days. You will need: Company name and address, tax code, content sample in English, message example. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | Yes |
| Quiet hours | Sending allowed 08:00 to 20:00 every day, in the recipient's time zone (from the number). |
| Content restrictions | Prohibited: phishing, regulatory, other scams, delivery phishing. |

Last checked 30 September 2026 [Questions about Montenegro?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Montenegro)

### Montserrat · MS · Confirmed

Alphanumeric and numeric senders can be used for Montserrat with no registration. Short codes are also supported, but messages are one-way only.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Montserrat?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Montserrat)

### Morocco · MA · Check with us

Alphanumeric sender IDs must be registered for Morocco, which takes 20+ days. Numeric senders are listed as supported, but on Wana Telecom and Maroc Telecom numeric and unregistered senders are overwritten with a generic alpha ID and delivery is best effort. Messages can only be sent between 08:00 and 20:00 Morocco time.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Morocco) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: International: company name, website, estimated monthly volume, industry, message example, use case description. Takes 20+ days. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | 08:00 to 20:00 Morocco time (UTC+1), every day. |
| Content restrictions | Prohibited: scams, phishing, regulatory, gambling. Use non-generic sender IDs. |

Last checked 30 September 2026 [Questions about Morocco?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Morocco)

### Mozambique · MZ · Confirmed

Mozambique can be reached from outside the country with an alphanumeric sender ID without registration, and the message text should name your brand. Numeric senders are overwritten and not supported on Movitel.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: regulatory, phishing. The message body should contain the brand or application name, or it may be blocked. URLs allowed. |

Last checked 30 September 2026 [Questions about Mozambique?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Mozambique)

### Myanmar · MM · Check with us

Alphanumeric sender IDs must be registered for sending from outside the country, which takes 20 days or more and needs a business license and tax code. Numeric and short code use should be confirmed with us before sending.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Myanmar) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, website, country, headquarters address, industry, tax code, estimated monthly volume, message example. Document: business license |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Myanmar?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Myanmar)

### Nagorno-Karabakh · NK · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Nagorno-Karabakh).

### Namibia · NA · Check with us

Alphanumeric senders must be registered for Namibia, which takes 20 days or more and needs a Letter of Authorization. Numeric senders are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Namibia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, industry, service or brand name, and a Letter of Authorization (international route). Local route also needs a message example. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, other scams, delivery phishing. |

Last checked 30 September 2026 [Questions about Namibia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Namibia)

### Nauru · NR · Confirmed

Alphanumeric sender IDs and long numbers work on international traffic only, with no registration. No short codes or 2-way.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Nauru?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Nauru)

### Nepal · NP · Confirmed

Alphanumeric sender IDs must be registered, which takes 20 days or more from outside the country, and unregistered senders are overwritten with a generic ID. Numeric and short code senders are not supported, and two-way SMS is not available.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, website, country, headquarters address, industry, estimated monthly volume, content sample, use case description |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing and regulatory content. Unregistered sender IDs are overwritten with a generic alphanumeric sender and delivered on a best-effort basis. |

Last checked 30 September 2026 [Questions about Nepal?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Nepal)

### Netherlands · NL · Confirmed

Alphanumeric and numeric senders can be used for the Netherlands with no registration, and two-way is supported. Gambling and explicit content is prohibited.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, gambling, explicit content, delivery phishing, other scams. Delivery to M2M numbers is best effort. |

Last checked 30 September 2026 [Questions about Netherlands?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Netherlands)

### New Caledonia · NC · Confirmed

Alphanumeric and numeric senders can be used for New Caledonia with no registration. Two-way is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about New Caledonia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20New%20Caledonia)

### New Zealand · NZ · Confirmed

New Zealand only accepts a registered short code as the sender, which takes about 10 days. Alphanumeric and long numeric senders are not supported. Opt-in and opt-out are required for marketing, and gambling, adult and political content are banned.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Opt-out | Opt-out required for promotional messages. |
| Content restrictions | Gambling of all forms, adult and political content are not allowed. Regulatory content, scams and phishing are prohibited. Marketing is strictly regulated with high penalties. Operators require the wording "Reply to this SMS will be charged" on every message. |

Last checked 30 September 2026 [Questions about New Zealand?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20New%20Zealand)

### Nicaragua · NI · Check with us

Alphanumeric sender IDs must be registered, which takes 20 days or more. The ID is overwritten with a short code on most networks, except Movistar where it is kept. Two-way SMS is supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Nicaragua) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: International: company name, address, region, website, tax code, contact person and mobile number, use case description, content sample, message example, opt-in method, and the transactional and promotional sender ID form. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | The character Ñ needs UCS-2 on Telefonica. Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Nicaragua?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Nicaragua)

### Niger · NE · Check with us

Alphanumeric senders can be used from outside the country with no registration; registration applies only to local traffic. International numeric senders are not supported, so alpha should be used. Short codes and two-way SMS are not available.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Niger) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory content and phishing. Generic sender IDs such as INFO or Verify should be avoided. |

Last checked 30 September 2026 [Questions about Niger?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Niger)

### Nigeria · NG · Check with us

Alphanumeric sender IDs must be pre-registered (about 6 days for international traffic) and promotional content cannot be registered. Send only 07:00 to 19:00 UTC. Numeric senders are unreliable, and numbers on the national DND list may not receive messages.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Nigeria) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 6 days. You will need: International: company name, website, contact person, email and mobile number, estimated monthly volume, message example, use case description. Local traffic also needs CAC number and certificate, industry licences where relevant, and a letter of authorization. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Opt-out | Nigeria has a national Do-Not-Disturb registry; DND numbers can block even non-promotional messages. |
| Quiet hours | Sending allowed 07:00 to 19:00 UTC, every day. |
| Content restrictions | Prohibited: other scams, gambling, regulatory, phishing. Also not allowed: adult, money or loan, political, religious, controlled substance, cannabis and alcohol content. Promotional content cannot be registered. Using 'Google' as a sender is prohibited. Avoid generic IDs such as INFO or Verify. |

Last checked 30 September 2026 [Questions about Nigeria?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Nigeria)

### Niue · NU · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Niue).

### Norfolk Island · NF · Confirmed

Alphanumeric sender IDs, long numbers and short codes can be used with no registration. No 2-way.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Norfolk Island?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Norfolk%20Island)

### North Korea · KP · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20North%20Korea).

### North Macedonia · MK · Check with us

Alphanumeric senders must be registered for North Macedonia, which takes about 14 days on the international route. Numeric senders and short codes are not supported, and generic sender names should be avoided.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20North%20Macedonia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 14 days. You will need: Company name, company website, message example (international route). Local route also needs company registration number and tax code. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing, other scams. Avoid generic sender IDs such as SMS, TEXT, INFO, Verify, Notify. |

Last checked 30 September 2026 [Questions about North Macedonia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20North%20Macedonia)

### Northern Cyprus · KK · Confirmed

Alphanumeric and long numeric senders are supported, but sender registration is required and takes about 3 days. Registration needs company details plus three documents: a subscription agreement, a Turkish operator authorization letter and a non objection certificate. No short codes or two-way SMS.

| Alphanumeric sender (your brand name) | Supported, contact us about registration. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Gambling, regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Northern Cyprus?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Northern%20Cyprus)

### Northern Mariana Islands · MP · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Northern%20Mariana%20Islands).

### Norway · NO · Check with us

Alphanumeric sender IDs must be registered for Norway, which takes about 2 days. Numeric senders are also supported and two-way works. URLs are not allowed in messages, and gambling and lottery content is banned.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Norway) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 2 days. You will need: Company name, website, country, industry, message example. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | No URLs in messages. Prohibited: scams, regulatory, phishing, delivery phishing, explicit content. Gambling and lottery content is strictly prohibited by Norwegian operators. Delivery to M2M numbers is best effort. |

Last checked 30 September 2026 [Questions about Norway?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Norway)

### Oman · OM · Check with us

Alphanumeric sender IDs must be registered before sending, which takes 14 days for international traffic and needs an Omantel Non Objection Certificate. Unregistered IDs are best effort and may not deliver, and numeric IDs may be overwritten. No two-way SMS.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Oman) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 14 days. You will need: International: company name, address, headquarters address, website, country, industry, contact person, email and mobile number, estimated monthly volume, message example, English content sample, and an Omantel Non Objection Certificate. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory, phishing and other scam topics prohibited. Unregistered sender IDs are best effort and may fail. |

Last checked 30 September 2026 [Questions about Oman?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Oman)

### Pakistan · PK · Check with us

Pakistan requires a registered alphanumeric sender ID, which takes about 15 days. Sending is limited to 08:00 to 20:00, and numeric IDs or unregistered IDs may be replaced with a short code or generic sender.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Pakistan) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 15 days. You will need: Company name, website, headquarters address, estimated monthly volume, message example. Takes about 15 days (20 days or more for local traffic). |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | 08:00 to 20:00 every day, in the recipient's local time. |
| Content restrictions | Regulatory content, phishing, scams, explicit content, gambling and delivery phishing are prohibited. Person-to-person traffic may not be sent through operators. |

Last checked 30 September 2026 [Questions about Pakistan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Pakistan)

### Palau · PW · Confirmed

Alphanumeric senders and long numbers can be used to send to Palau with no registration. No short codes and no replies.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Palau?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Palau)

### Palestine · PS · Confirmed

Alphanumeric senders can be used from outside the country with no registration; registration applies only to local traffic. Numeric and short code senders are not supported, and two-way SMS is not available. Loans, gambling, adult and crypto content is not allowed.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing, regulatory content, personal loans, gambling, pornography and cryptocurrency. |

Last checked 30 September 2026 [Questions about Palestine?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Palestine)

### Panama · PA · Check with us

Alphanumeric and numeric senders can be used for Panama with no registration, and short codes and two-way are also supported. Numeric senders may be overwritten on Telefonica and Cable & Wireless.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Panama) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing. |

Last checked 30 September 2026 [Questions about Panama?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Panama)

### Papua New Guinea · PG · Check with us

Alphanumeric sender IDs can be used with no registration. International long numbers are sent on a best effort basis only and the sender is not preserved. No 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Papua%20New%20Guinea) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Papua New Guinea?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Papua%20New%20Guinea)

### Paraguay · PY · Confirmed

Paraguay does not support alphanumeric or long numeric senders; short codes are listed as supported, and no registration applies. Sender IDs are overwritten with random numbers. Sending is limited to set hours and never on Sunday.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | No |
| Quiet hours | Mon to Fri 08:00 to 18:00, Sat 09:00 to 15:00, no Sunday sends. Recipient's local time. |
| Content restrictions | Regulatory content, phishing, scams and delivery phishing are prohibited. |

Last checked 30 September 2026 [Questions about Paraguay?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Paraguay)

### Peru · PE · Confirmed

International traffic to Peru is converted to a short code by default, so the customer sender ID will not show. Alphanumeric senders and dedicated short codes can be requested. Two-way is supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, scams, delivery phishing, gambling. Specific senders are protected (a letter of authorization may be needed, especially for banks). |

Last checked 30 September 2026 [Questions about Peru?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Peru)

### Philippines · PH · Check with us

Alphanumeric sender IDs must be registered (about 15 days) and unregistered IDs are blocked. Use full URLs, never short links, and expect strict content rules. Replies are supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Philippines) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 15 days. You will need: Company name, website, headquarters address, estimated monthly volume, message example, use case description, letter of authorization (client to the gateway, or via aggregator), and for banking or finance senders a business permit, registration documents and industry licences. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | Opted-in subscribers need a way to opt out, with opt-out instructions weekly for daily subscriptions and monthly for weekly ones. |
| Content restrictions | Prohibited: phishing, scams, explicit content, regulatory. Gambling allowed only for OTP; offshore gaming barred. Adult, alcohol, drugs, tobacco, election and political content is not allowed. Loans, real estate and product promotions get blocked. Short URLs are blocked; use full URLs, and allow-list banking URLs. No phone numbers in the message body. Sender IDs with TEST, MESSAGE, SMS, SMART or SUN are not allowed. Messages that look person-to-person get filtered. |

Last checked 30 September 2026 [Questions about Philippines?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Philippines)

### Pitcairn · PN · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Pitcairn).

### Poland · PL · Check with us

Alphanumeric sender IDs work without registration, but generic names are filtered by operators, so avoid them. Numeric senders from outside Poland are overwritten with a generic alphanumeric ID on some networks. Two-way SMS is supported, URL shorteners are banned and only licensed gambling is allowed.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Poland) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Only licensed gambling traffic is allowed. URL shorteners such as bit.ly are prohibited; use the full URL. Long messages with URLs may be blocked, so test first. Avoid generic alpha IDs. |

Last checked 30 September 2026 [Questions about Poland?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Poland)

### Portugal · PT · Confirmed

Alphanumeric sender IDs and long numbers can be used with no registration. Short codes are not supported. 2-way works.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: other scams, regulatory, phishing, delivery phishing, gambling, explicit content. |

Last checked 30 September 2026 [Questions about Portugal?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Portugal)

### Puerto Rico · PR · Confirmed

Alphanumeric senders are not supported for Puerto Rico. Customers send from a short code, 10DLC number or toll-free number, with mandatory opt-in and use case registration that takes about 3 to 8 weeks.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, registration required. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: phishing, scams, regulatory, gambling. US-style forbidden categories also apply, including high-risk financial services, debt collection, cryptocurrency, lead generation, controlled substances, tobacco, vape and adult content. The euro symbol is not supported. |

Last checked 30 September 2026 [Questions about Puerto Rico?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Puerto%20Rico)

### Qatar · QA · Confirmed

Only registered alphanumeric sender IDs work in Qatar. Registration takes about 7 days for international traffic and needs Non Objection Certificates from Ooredoo and Vodafone. Messages from abroad cannot contain links, and unused IDs can be deactivated, so keep sending regularly.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 7 days. You will need: International: company name, website, country, sender purpose, use case description, message example, and Non Objection Certificates for Ooredoo and Vodafone. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | International traffic cannot contain URLs. Adult, political, governmental, religious and cryptocurrency content is prohibited and accounts can be deny-listed. Gambling, scam, phishing and regulatory topics prohibited. |

Last checked 30 September 2026 [Questions about Qatar?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Qatar)

### Reunion · RE · Confirmed

Reunion can be reached from outside the country with an alphanumeric sender ID and no registration. Numeric senders are overwritten with a random short code. No sending on Sundays or public holidays, and none after 22:00.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Quiet hours | Monday to Saturday 00:00 to 22:00 Reunion time (UTC+4). No sending on Sunday or on 1 Jan, 18 Apr, 1 May, 8 May, 26 May, 5 Jun, 6 Jun, 14 Jul, 15 Aug, 1 Nov, 11 Nov and 25 Dec. |
| Content restrictions | Prohibited topics: regulatory, phishing, gambling, delivery phishing, explicit content, other scams. |

Last checked 30 September 2026 [Questions about Reunion?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Reunion)

### Romania · RO · Check with us

Alphanumeric senders must be registered for Romania, which takes 20 days or more and needs operator agreements. Links are filtered unless allowlisted, and numeric senders are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Romania) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, website, country, message example, URL used in the SMS, use case description, plus operator agreements (trademark use or sender name use) for Orange, Digi and Telekom as applicable. Full short code coverage needs 2 short codes. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, other scams, phishing, delivery phishing. Romanian operators block or filter URLs, so links must be allowlisted with the sender registration. |

Last checked 30 September 2026 [Questions about Romania?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Romania)

### Russia · RU · Check with us

Alphanumeric sender IDs must be registered, which takes 20 days or more and needs a tax code and supporting letters. Numeric and short code senders are not supported. Strict content rules apply, including no political, adult, alcohol, tobacco or drug content.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Russia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, website, country, industry, tax code, estimated monthly volume, message example, use case. Documents: letter on non-proliferation of advertising, NOC Megafon Russia |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Gambling is only allowed for OTP. Political, adult, alcohol, tobacco and drug content is forbidden. Also prohibited: regulatory content, phishing and scams. Advertising a different legal entity than the one registered is prohibited, with fines of up to 500,000 RUB per breach. |

Last checked 30 September 2026 [Questions about Russia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Russia)

### Rwanda · RW · Check with us

Alphanumeric sender IDs must be registered (about 16 days), and promotional content cannot be registered. Numeric senders fail on MTN and are altered on Airtel. No 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Rwanda) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 16 days. You will need: International: company name, website, contact person, contact email, contact mobile number, estimated monthly volume, message example, use case description |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. Promotional content cannot be registered. Avoid generic sender IDs like Info or Verify. |

Last checked 30 September 2026 [Questions about Rwanda?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Rwanda)

### Saint Barthélemy · BL · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Saint%20Barth%C3%A9lemy).

### Saint Helena · SH · Confirmed

Alphanumeric or long numeric senders can be used with no registration. Two-way SMS is not available, and phishing is not allowed.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing prohibited. |

Last checked 30 September 2026 [Questions about Saint Helena?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Saint%20Helena)

### Saint Kitts and Nevis · KN · Confirmed

Alphanumeric senders can be used for Saint Kitts and Nevis with no registration. Numeric senders are accepted but the sender ID is not preserved, and messages are one-way only.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Saint Kitts and Nevis?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Saint%20Kitts%20and%20Nevis)

### Saint Lucia · LC · Confirmed

Alphanumeric and numeric senders can be used for Saint Lucia with no registration. Messages are one-way only.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Saint Lucia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Saint%20Lucia)

### Saint Martin (French part) · MF · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Saint%20Martin%20(French%20part)).

### Saint Pierre and Miquelon · PM · Confirmed

Saint Pierre and Miquelon can be reached from outside the country with an alphanumeric or numeric sender ID and no registration.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topic: phishing. URLs allowed. |

Last checked 30 September 2026 [Questions about Saint Pierre and Miquelon?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Saint%20Pierre%20and%20Miquelon)

### Saint Vincent and The Grenadines · VC · Confirmed

Alphanumeric senders can be used for Saint Vincent and the Grenadines with no registration. Numeric senders and short codes are also listed as supported, but messages are one-way only.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Saint Vincent and The Grenadines?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Saint%20Vincent%20and%20The%20Grenadines)

### Samoa · WS · Confirmed

Samoa can be reached from outside the country with an alphanumeric or numeric sender ID and no registration.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: regulatory, phishing. URLs allowed. Concatenated (long) messages are not supported. |

Last checked 30 September 2026 [Questions about Samoa?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Samoa)

### San Marino · SM · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20San%20Marino).

### Sao Tome and Principe · ST · Confirmed

Alphanumeric senders can be used to send to Sao Tome and Principe with no registration. Long numbers and short codes are also listed as supported. No replies.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing. |

Last checked 30 September 2026 [Questions about Sao Tome and Principe?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Sao%20Tome%20and%20Principe)

### Saudi Arabia · SA · Check with us

Alphanumeric sender IDs must be registered (20+ days). Links are not allowed for international traffic. Numeric senders are listed as supported but networks may block them, so prefer alphanumeric. Domestic brands cannot be registered through a reseller.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Saudi%20Arabia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: International: company name, website, headquarters address, estimated monthly volume, message example, sample URL if any, letter of undertaking and a non-objection certificate. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | Messages to numbers on the DND list are filtered. |
| Quiet hours | Sending allowed 06:00 to 19:00 UTC every day. Promotional messages are also limited to 09:00 to 20:00 local time. |
| Content restrictions | Prohibited: regulatory, scams, phishing, all gambling. Political, adult, religious and cryptocurrency content is not allowed, nor are money or loans, controlled substances, cannabis and alcohol. International traffic cannot carry URLs, and URLs must be whitelisted. No WhatsApp or LINE links or phone numbers in the body. Promotional alphanumeric IDs need the -AD suffix. Identical repeat messages get blocked. |

Last checked 30 September 2026 [Questions about Saudi Arabia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Saudi%20Arabia)

### Senegal · SN · Check with us

Alphanumeric senders must be registered for Senegal, which takes about 15 days on the international route and needs a Letter of Authorization. Since 8 September 2026, traffic to Expresso and Orange must use an alphanumeric sender, and numeric senders are blocked there.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Senegal) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 15 days. You will need: Company name, website, message example, URL used in the SMS, and a Senegal Letter of Authorization (international route). |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. Since 8 September 2026, traffic to Expresso and Orange must use an alphanumeric sender, and international long codes to them are blocked. |

Last checked 30 September 2026 [Questions about Senegal?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Senegal)

### Serbia · RS · Check with us

Alphanumeric sender IDs must be registered for Serbia, which takes about 12 days, and the opt-out keyword must be supplied. Numeric senders and international short codes are not supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Serbia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 12 days. You will need: International: company name, website, message example, use case description, and the opt-out keyword and syntax. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Opt-out | Opt-out keyword and syntax are required for registration. For promotional traffic, adding "Odjava STOPMFL na 1599, 0din" to each SMS is suggested. |
| Content restrictions | Prohibited: regulatory, phishing, scams. |

Last checked 30 September 2026 [Questions about Serbia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Serbia)

### Seychelles · SC · Check with us

Alphanumeric and long numeric senders are supported. Sender registration is required, taking about 9 days with a message example, but which sender types it covers is not confirmed. Numeric IDs are overwritten with a generic alphanumeric ID on Airtel. No two-way SMS.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Seychelles) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, contact us about registration. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Seychelles?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Seychelles)

### Sierra Leone · SL · Check with us

International senders can use alphanumeric IDs without registration, but generic names should be avoided on Africell. Numeric senders are supported for international traffic, but the sender ID does not arrive unchanged. No two-way SMS.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Sierra%20Leone) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Avoid generic alpha IDs on Africell, which may block them. Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Sierra Leone?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Sierra%20Leone)

### Singapore · SG · Check with us

Singapore requires the customer to register their alphanumeric sender ID with SGNIC first, then with the gateway, which takes about 14 days. Unregistered senders are not allowed. Numeric senders are listed as supported but may be overwritten with "Likely-SCAM", so use the registered alphanumeric ID. Two-way is supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Singapore) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 14 days. You will need: The customer must first register the Sender ID with SGNIC (SSIR portal) and pay for it; the gateway cannot do this on their behalf. Then provide the SSIR sender status screenshot, letters of authorization, message example and use case description. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Gambling: OTP only. Adult content and promotional loan traffic are strictly forbidden. Firearms, political, religious, controlled substance, cannabis and alcohol content and WhatsApp/LINE chat links are also barred. Only registered Sender IDs are permitted since 31 January 2023, and unregistered ones may be overwritten with "Likely-SCAM". |

Last checked 30 September 2026 [Questions about Singapore?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Singapore)

### Sint Maarten · SX · Confirmed

Alphanumeric, long numeric and short code senders are supported with no sender registration. Two-way SMS is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Sint Maarten?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Sint%20Maarten)

### Slovakia · SK · Check with us

Slovakia requires a registered alphanumeric sender ID, which takes 20 days or more. International long codes are replaced with a generic alpha sender, so alphanumeric is the safer choice.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Slovakia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Message example. Takes 20 days or more. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Regulatory content, phishing, delivery phishing, scams and gambling are prohibited. |

Last checked 30 September 2026 [Questions about Slovakia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Slovakia)

### Slovenia · SI · Confirmed

From outside Slovenia, alphanumeric sender IDs and long numbers can be used with no registration. Registration is only needed for local traffic.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: phishing, regulatory, delivery phishing, other scams. |

Last checked 30 September 2026 [Questions about Slovenia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Slovenia)

### Solomon Islands · SB · Confirmed

Solomon Islands supports alphanumeric and long numeric senders with no registration, and sender IDs arrive unchanged. Short codes and two-way SMS are not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing is prohibited. |

Last checked 30 September 2026 [Questions about Solomon Islands?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Solomon%20Islands)

### Somalia · SO · Confirmed

Alphanumeric senders can be used for Somalia with no registration. Alphanumeric is recommended because numeric senders are blocked on Somtel. Two-way is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. Numeric senders are prohibited on Somtel. Avoid generic alphanumeric IDs, which get blocked. |

Last checked 30 September 2026 [Questions about Somalia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Somalia)

### South Africa · ZA · Check with us

Alphanumeric sender IDs must be registered (about 9 days for international traffic). International long numbers are overwritten with a random local number. Marketing has time limits under the WASPA code.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20South%20Africa) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 9 days. You will need: Company name, contact person, email and mobile number, estimated monthly volume, message example, use case description. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Quiet hours | Sending allowed 08:00 to 20:00 every day (UTC+2). WASPA code: no marketing on Sundays and public holidays, Saturdays before 9am or after 1pm, or other days between 8pm and 8am. |
| Content restrictions | Prohibited: regulatory, phishing, other scams. Gambling traffic is not restricted. Direct marketing is regulated by the WASPA Code of Conduct. |

Last checked 30 September 2026 [Questions about South Africa?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20South%20Africa)

### South Georgia and the South Sandwich Islands · GS · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20South%20Georgia%20and%20the%20South%20Sandwich%20Islands).

### South Korea · KR · Confirmed

Only long numeric senders can be used. Alphanumeric senders and short codes are not supported, and the sender number is changed on delivery because a 009 or 006 prefix is added. Messages can only be sent 8am to 8pm recipient time, and gambling and adult content is not allowed.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Quiet hours | 08:00 to 20:00 every day, in the recipient's time zone. |
| Content restrictions | Prohibited: phishing, scams, gambling and regulatory content. Adult content is not allowed. Messages are automatically tagged [Web 발신] (A2P) or [국제발신] (sent from abroad). Only EUC-KR characters are supported. International long code senders get a 009 or 006 prefix added, as required by operators. |

Last checked 30 September 2026 [Questions about South Korea?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20South%20Korea)

### South Ossetia · OS · Confirmed

South Ossetia can be reached only with a registered alphanumeric sender ID (about 5 days). Numeric and short code senders are not supported.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 5 days. You will need: Company name, company website, message example, tax code. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topic: phishing. URLs allowed. |

Last checked 30 September 2026 [Questions about South Ossetia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20South%20Ossetia)

### South Sudan · SS · Check with us

Alphanumeric sender IDs must be registered (about 13 days), and promotional content cannot be registered. Links are not allowed. Numeric senders fail on MTN. No short codes or 2-way.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20South%20Sudan) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 13 days. You will need: Company name, contact person, contact email, contact mobile number, estimated monthly volume, message example, use case description |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. Links are not allowed. Promotional content cannot be registered. Avoid generic sender IDs like Info or Verify. |

Last checked 30 September 2026 [Questions about South Sudan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20South%20Sudan)

### Spain · ES · Confirmed

Alphanumeric sender IDs must be registered as an alias, which takes 20+ days (up to 4 weeks). Long numbers work without registration and replies are supported. Short codes exist but can take 12 to 14 weeks to obtain.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Alias holder details (name, tax ID, type, mailing address), representative details, signed authorization letter, responsible declaration of the alias holder, and details of any third party or link to the holder. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, delivery phishing, other scams, gambling and cannabis. Domestic long codes can only send domestic messages. |

Last checked 30 September 2026 [Questions about Spain?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Spain)

### Sri Lanka · LK · Check with us

Alphanumeric sender IDs must be registered for sending from outside the country, which takes 20 days or more. Since 29 July 2026, unregistered senders are blocked on Dialog, Etisalat and Hutchison, and Mobitel accepts only OTP and transactional messages.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Sri%20Lanka) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, website, headquarters address, industry, field of activity, service or brand name, estimated monthly volume, use case, message example. Documents: sender ID registration form, NOC letter, letter of authorization |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory content, scams and phishing. Mobitel only allows OTP, OTT and transactional traffic such as banking and payments; other traffic with a registered sender ID is blocked. Numeric senders are blocked on Dialog, Etisalat and Hutchison. |

Last checked 30 September 2026 [Questions about Sri Lanka?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Sri%20Lanka)

### Sudan · SD · Confirmed

Sudan can be reached with a registered alphanumeric sender ID (about 4 days). Promotional content cannot be registered, and numeric senders are not delivered on MTN and Sudani One.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 4 days. You will need: Company name, contact person, contact email, contact mobile number, estimated monthly volume, message example, use case description. Promotional content cannot be registered. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: regulatory, phishing. Do not register generic IDs such as InfoSMS, INFO, Verify or Notify. Promotional content cannot be registered. |

Last checked 30 September 2026 [Questions about Sudan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Sudan)

### Suriname · SR · Confirmed

Alphanumeric or long numeric senders can be used with no registration. Two-way SMS is not available, and short code use should be confirmed with us first.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Suriname?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Suriname)

### Svalbard · SJ · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Svalbard).

### Sweden · SE · Check with us

Alphanumeric senders must be registered for Sweden, which takes about 3 days. Numeric senders and short codes are also supported, and two-way works. Gambling, lottery and adult content is restricted.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Sweden) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 3 days. You will need: Company name, website, country, industry, message example, URL used in the SMS. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, phishing, other scams, gambling, explicit content, delivery phishing. Lottery and adult content is restricted. Delivery to M2M numbers is best effort. |

Last checked 30 September 2026 [Questions about Sweden?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Sweden)

### Switzerland · CH · Confirmed

Alphanumeric or long numeric senders can be used with no registration, and two-way SMS works. Scams, phishing and cannabis content are not allowed.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Prohibited: regulatory, delivery phishing, phishing and other scams. Cannabis content is strictly prohibited. |

Last checked 30 September 2026 [Questions about Switzerland?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Switzerland)

### Syria · SY · Check with us

Alphanumeric sender IDs for Syria must be registered (about 4 days). Numeric and short code senders are not supported. Confirm availability with us before sending.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Syria) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 4 days. You will need: Company name, company website, industry, message example, use case description. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited topics: regulatory, phishing, other scams. URLs allowed. |

Last checked 30 September 2026 [Questions about Syria?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Syria)

### Taiwan · TW · Check with us

Taiwan can be reached with a numeric sender ID after brand registration (about 15 days, needs a business license and utility bill). Messages must start with the brand name, URLs need allowlisting, and the sender is overwritten with a local number.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Taiwan) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, registration required. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | Yes |
| Quiet hours | 03:00 to 23:59 every day, recipient time zone. Promotional messages are not allowed from 12:30 to 13:30 or from 21:00 to 09:00. |
| Content restrictions | The message must start with the registered brand name. URLs are strictly prohibited unless the full-length URL is allowlisted, and WhatsApp or LINE links are not allowed. Prohibited: gambling, adult content, drugs, trading and stock content, loans, firearms, political, religious, cannabis, alcohol, phishing and scams. Fines apply for fraud messages. |

Last checked 30 September 2026 [Questions about Taiwan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Taiwan)

### Tajikistan · TJ · Confirmed

Alphanumeric and long numeric senders work without registration, though numeric IDs are overwritten on Megafon, so alphanumeric is safer. No two-way SMS.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Numeric sender IDs to Megafon Tajikistan are overwritten with a generic alpha ID. Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Tajikistan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Tajikistan)

### Tanzania · TZ · Confirmed

Alphanumeric senders must be registered for Tanzania, which takes about 8 days on the international route. Only alphanumeric senders are supported, and sending is limited to 08:00 to 20:00 local time.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 8 days. You will need: International route: company name, address, website, country, tax code, field of activity, estimated monthly volume, message example, URL in SMS, use case, opt-in method, opt-out method and setup, and a Letter of Authorization. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Quiet hours | 08:00 to 20:00 every day, Tanzania time (UTC+3, Dodoma). |
| Content restrictions | Prohibited: other scams, phishing, regulatory. Avoid generic sender IDs such as InfoSMS, INFO, Verify, Notify. |

Last checked 30 September 2026 [Questions about Tanzania?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Tanzania)

### Thailand · TH · Check with us

Thailand requires a registered alphanumeric sender ID (20 days or more), and every URL in messages must be registered. Since 6 October 2025, unregistered IDs are blocked, and unused IDs may be deactivated.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Thailand) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, registration number, tax code, website, industry, monthly volume, message example, sender purpose, URLs used. Documents: letters of authorization, A2P guidelines form, URL registration form, whitelist letter. Takes 20 days or more. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | Opt-out is handled by the mobile operator: subscribers dial a short number to stop promotions. |
| Quiet hours | Marketing and promotional messages may not be sent from 21:00 to 09:00. |
| Content restrictions | All URLs in messages must be safelisted with the sender ID or the message is blocked (NBTC rule). Shortened URLs cannot be registered. Gambling, adult, drug, racial, and fake loan, crypto or job content are forbidden. Loan content needs a Bank of Thailand licence. Since 6 October 2025, messages from unregistered sender IDs are blocked. |

Last checked 30 September 2026 [Questions about Thailand?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Thailand)

### Timor-Leste · TL · Check with us

Alphanumeric senders can be used for Timor-Leste with no registration, and numeric senders are also supported. Delivery on Telkomcel and Telemor may need extra steps, so confirm before sending.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Timor-Leste) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Timor-Leste?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Timor-Leste)

### Togo · TG · Confirmed

Alphanumeric senders and long numbers work for international traffic with no registration. Registration (about 6 days, letter of authorization, brand name added to the text) applies only to local traffic. No replies.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Togo?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Togo)

### Tokelau · TK · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Tokelau).

### Tonga · TO · Confirmed

Alphanumeric sender IDs, long numbers and short codes can be used with no registration. No 2-way.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Tonga?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Tonga)

### Trinidad and Tobago · TT · Check with us

Trinidad and Tobago supports alphanumeric and numeric senders with no registration. On the bMobile network, alpha and numeric IDs are replaced with a random number.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Trinidad%20and%20Tobago) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Regulatory content and phishing are prohibited. |

Last checked 30 September 2026 [Questions about Trinidad and Tobago?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Trinidad%20and%20Tobago)

### Tunisia · TN · Confirmed

Alphanumeric senders can be used from outside the country with no registration; registration applies only to local traffic. Numeric senders are replaced with a generic alpha ID, so alpha is recommended. Two-way SMS is not available.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory content, scams and phishing. Generic alphanumeric sender IDs tend to be blocked and should be avoided. International long codes are overwritten with a generic alphanumeric sender. |

Last checked 30 September 2026 [Questions about Tunisia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Tunisia)

### Turkey · TR · Check with us

Alphanumeric sender IDs must be registered (about 7 days). International senders can send transactional traffic only, with no promotional traffic and no links, and opt-out is mandatory. From 18 November 2026, unregistered IDs are blocked.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Turkey) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 7 days. You will need: International: company name, website, message example. Local also needs company address and a contact person. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | Mandatory. |
| Content restrictions | International senders can only send transactional traffic, not promotional; promotional is for local clients only. Reseller traffic is forbidden. Links are not allowed (companies without a Turkish entity cannot send URLs since 1 April 2026). Prohibited: regulatory, gambling, scams, phishing, P2P, politics, religion. Messages carry 5 fewer characters (155 GSM, 65 Unicode). Northern Cyprus is not supported. |

Last checked 30 September 2026 [Questions about Turkey?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Turkey)

### Turkmenistan · TM · Check with us

Alphanumeric and numeric senders are supported for Turkmenistan with no registration, but local operators replace the sender with an international long code, so the customer sender ID will not show.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Turkmenistan) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: phishing, regulatory. |

Last checked 30 September 2026 [Questions about Turkmenistan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Turkmenistan)

### Turks and Caicos Islands · TC · Confirmed

Alphanumeric and numeric senders can be used for Turks and Caicos with no registration. Two-way is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Turks and Caicos Islands?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Turks%20and%20Caicos%20Islands)

### Tuvalu · TV · Check with us

Alphanumeric senders are supported with no registration. Numeric and short code senders are not supported, and there is no two-way SMS.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Tuvalu) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing prohibited. |

Last checked 30 September 2026 [Questions about Tuvalu?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Tuvalu)

### Uganda · UG · Check with us

Alphanumeric sender IDs must be registered, which takes 20 days or more. Numeric and short code senders are not supported. Messages must include an opt-out and can only be sent between 6am and 7pm Uganda time.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Uganda) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, address, website, contact person, email and mobile, estimated monthly volume, server IP address, message example, use case. Documents: sender ID registration form, letter of authorization |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | Yes |
| Opt-out | Opt-out is mandatory. |
| Quiet hours | 06:01 to 18:59 every day (UTC+3, Kampala). |
| Content restrictions | Prohibited: regulatory content, phishing and gambling. Promotional content cannot be registered as an alphanumeric sender. Generic sender IDs such as INFO or Verify should be avoided. Numeric senders are not supported on MTN, Airtel, Africel and Smart. |

Last checked 30 September 2026 [Questions about Uganda?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Uganda)

### Ukraine · UA · Check with us

Alphanumeric sender IDs must be registered for Ukraine, which takes about 4 days and only needs a message example. Numeric senders are replaced with a generic alpha ID on a best-effort basis and fail on Trimob, so use the alphanumeric ID.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Ukraine) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 4 days. You will need: International: a message example. Takes about 4 days. Local traffic also needs company details, tax code and proof of local presence (20+ days). |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, scams. Adult and political content is not allowed. Avoid generic alpha sender IDs, which operators block or filter. |

Last checked 30 September 2026 [Questions about Ukraine?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Ukraine)

### United Arab Emirates · AE · Check with us

Alphanumeric sender IDs are supported for the UAE, but new international alphanumeric registrations have been suspended since 15 July 2026 until further notice. Numeric long codes are not supported. Messages can only be sent between 07:00 and 21:00 UAE time, and URLs must be allowlisted.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20United%20Arab%20Emirates) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, contact us about registration. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Yes |
| Two-way (recipients can reply) | No |
| Opt-out | Opt-out instructions are mandatory in messages. |
| Quiet hours | 07:00 to 21:00 UAE time (UTC+4), every day. Promotional messages outside these hours are queued until the window opens. |
| Content restrictions | No gambling, political, adult, religious or cryptocurrency content. Money/loan, controlled substance, cannabis and alcohol content is also barred. URLs must be allowlisted. Promotional Sender IDs need an AD- prefix, which counts toward the 11 characters. Promotional content is only for domestic entities. |

Last checked 30 September 2026 [Questions about United Arab Emirates?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20United%20Arab%20Emirates)

### United Kingdom · GB · Confirmed

The UK supports alphanumeric senders, which must be registered (about 1 day). Protected brand names need extra approval, generic IDs are blocked, and gambling and cannabis are restricted.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 1 day. You will need: Company name, website, country, industry, message example, opt-out method and setup, relationship between company and sender. Registration takes about 1 day. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Gambling: licensed traffic only (raffles allowed). Cannabis content prohibited. CBD allowed with no health claims and only to adults; double opt-in advised. Protected brand IDs (BT, MEF) need pre-registration and may need a letter of authorization. Generic sender IDs (INFO, SMS, ALERT etc) are blocked. Sender IDs should use only letters, digits, and . - _ space &. |

Last checked 30 September 2026 [Questions about United Kingdom?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20United%20Kingdom)

### United States · US · Check with us

Sending requires US numbers (10DLC, toll-free or short code) registered to a brand and campaign before sending. Alphanumeric senders do not work. Explicit opt-in and STOP handling are required, and violations can bring carrier fines.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20United%20States) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, registration required. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Opt-out | Mandatory. Working STOP and HELP keywords are required. |
| Content restrictions | Prohibited: scams, phishing, gambling, explicit content, SHAFT (sex, hate, alcohol, firearms, tobacco), payday and high-risk loans, debt forgiveness, cannabis, work-from-home offers, unapproved political content. Snowshoeing and campaign drifting are forbidden. Age gating is mandatory for restricted content. T-Mobile can pass through fines of $1,000 to $10,000 for violations. The euro symbol is not supported. |

Last checked 30 September 2026 [Questions about United States?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20United%20States)

### United States Minor Outlying Islands · UM · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20United%20States%20Minor%20Outlying%20Islands).

### Uruguay · UY · Check with us

Uruguay does not support alphanumeric senders. Numeric and short code senders are listed as supported with no registration, but IDs are overwritten with a generic number or short code.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Uruguay) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Not available |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | No, networks may replace it |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory content, scams, phishing and delivery phishing are prohibited. |

Last checked 30 September 2026 [Questions about Uruguay?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Uruguay)

### US Virgin Islands · VI · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20US%20Virgin%20Islands).

### Uzbekistan · UZ · Check with us

Alphanumeric sender IDs must be registered, which takes about 17 days for international traffic. Since 3 August 2026, messages with unregistered IDs to UCELL are blocked. International long codes are blocked on UCELL, and numeric IDs are only kept intact on Beeline and UzMobile.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Uzbekistan) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 17 days. You will need: International: company name, address, website, country, industry, tax code, use case description, message example, estimated monthly volume. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | International long codes to UCELL are blocked. Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Uzbekistan?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Uzbekistan)

### Vanuatu · VU · Confirmed

Vanuatu supports alphanumeric, numeric and short code senders with no registration. Two-way SMS is not supported.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Regulatory content and phishing are prohibited. |

Last checked 30 September 2026 [Questions about Vanuatu?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Vanuatu)

### Venezuela · VE · Check with us

Alphanumeric sender IDs must be registered for Venezuela, which takes about 13 days. Registration is only supported on Digitel, and on other networks alpha and numeric senders may be replaced with a random number or generic ID.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Venezuela) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 13 days. You will need: Company name, website, message example. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing, gambling. UCS-2 characters may be flattened on Movistar. |

Last checked 30 September 2026 [Questions about Venezuela?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Venezuela)

### Vietnam · VN · Confirmed

Alphanumeric sender IDs and message templates must be registered (20+ days, with many documents). Numeric senders are overwritten and unregistered IDs are blocked. Every message must include the brand name, and promotional traffic has separate requirements.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Sender ID and message template registration. International: company name, address, headquarters address, website, industry, message example, any URL to be sent, business licence, domain certificate, letter of authorization, and brand ownership proof if the brand differs from the company. Many documents are needed, so allow time. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | No |
| Quiet hours | Mon to Fri 07:00 to 11:30 and 13:45 to 21:00; Sat and Sun 09:00 to 11:30 and 14:30 to 21:00 (UTC+7). No marketing between 8pm and 8am. |
| Content restrictions | Prohibited: regulatory, scams, gambling, phishing, delivery phishing. Adult, alcohol, drug, political, religious and virtual currency content is not allowed. Finance content needs a State Bank of Vietnam licence. Every message must include the brand or app name in the body. URLs must be registered in advance; avoid chat links and phone numbers in the body. Promotional local traffic has separate requirements. |

Last checked 30 September 2026 [Questions about Vietnam?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Vietnam)

### Wallis and Futuna · WF · Confirmed

Only alphanumeric sender IDs are supported, with no registration. Long numeric and short code senders are not supported, and there is no two-way SMS.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Not available |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Phishing prohibited. |

Last checked 30 September 2026 [Questions about Wallis and Futuna?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Wallis%20and%20Futuna)

### Western Sahara · EH · Contact us

Not confirmed on our routes. Contact us before sending. [Contact us before sending](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Western%20Sahara).

### Yemen · YE · Confirmed

Alphanumeric sender IDs must be registered for sending from outside the country, which takes 20 days or more. Long numeric senders are also listed as supported. Short codes and two-way SMS are not available.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 20 days. You will need: Company name, company website, message example |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | Contact us |
| Two-way (recipients can reply) | No |
| Content restrictions | Prohibited: regulatory, phishing. |

Last checked 30 September 2026 [Questions about Yemen?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Yemen)

### Zambia · ZM · Check with us

Zambia requires a registered alphanumeric sender ID, which takes about 10 days, and promotional content cannot be registered. Numeric IDs are not accepted by MTN, Zamtel or Airtel, so alphanumeric is the safer choice.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Zambia) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, registration required, typically 10 days. You will need: International: company name, website, contact person, email and mobile, estimated volume, message example, content sample, use case, and the SenderID registration form. Takes about 10 days. |
| --- | --- |
| Numeric sender (a phone number) | Supported, contact us about registration. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Promotional content cannot be registered as a sender ID. Scams, regulatory content, phishing and gambling are prohibited. Generic IDs such as INFO or Verify should be avoided. |

Last checked 30 September 2026 [Questions about Zambia?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Zambia)

### Zimbabwe · ZW · Check with us

International senders can use alphanumeric IDs without registration, but generic names are prohibited. Numeric senders work for international traffic but fail on Telecel, which does not support them. Two-way SMS is supported.

**Contact us to confirm before sending.** Our sources differ on some of these details. [Email us](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Zimbabwe) and we will confirm them for you.

| Alphanumeric sender (your brand name) | Supported, no registration needed. |
| --- | --- |
| Numeric sender (a phone number) | Supported, no registration needed. |
| Sender ID arrives unchanged | On some networks only |
| Two-way (recipients can reply) | Yes |
| Content restrictions | Generic alpha IDs are strictly prohibited. Telecel Zimbabwe does not support numeric sender IDs and only allows OTT/OTP messages. Regulatory and phishing topics prohibited. |

Last checked 30 September 2026 [Questions about Zimbabwe?](mailto:contact@realay.io?subject=Sending%20SMS%20to%20Zimbabwe)

Carriers and regulators change their rules from time to time. We review each country regularly, and the date on each one shows when it was last checked. If you are planning a large send or anything time-sensitive, [email us](mailto:contact@realay.io?subject=Coverage%20question) and we will confirm the current rules for you.