SMS sender ID checker: is your sender name valid?
Type the name you want customers to see as the SMS sender. The checker tests its length, characters and the common rules for Sri Lanka before you register it.
Type a sender ID to check it.
The checker applies the common rules published by SMS providers. Final approval of any sender ID is made by the networks. Your text stays in your browser.
Sender ID rules for Sri Lanka
A sender ID is the name shown as the sender of your SMS, such as YOURBRAND, in place of a phone number. These are the rules that SMS providers publish for alphanumeric sender IDs to Sri Lanka.
| Rule | What it means |
|---|---|
| Length | 3 to 11 characters |
| Characters | Letters A to Z and numbers 0 to 9. Spaces and hyphens are accepted by some providers only. |
| At least one letter | A number-only sender is not an alphanumeric sender ID |
| Registration | Required on the main networks before you send. Unregistered alphanumeric sender IDs are rejected, blocked or overwritten. |
| Not generic | Names such as INFO, SMS or ALERT are not accepted. Use your brand or company name. |
| Brand in the message | Providers report that the message text should include the brand name that matches the sender ID |
| Exact spelling and case | Register the sender ID exactly as you want it shown. Some carriers treat upper and lower case as different. |
How to register a sender ID in Sri Lanka
- Choose the name. Use this checker, and pick a name customers already know from your shop front, website or app.
- Prepare the details. Providers ask for broadly the same things: what you will send, sample messages that include your brand name, a business registration document and, if the link between the name and your company is not obvious, proof of your right to the brand.
- Submit through your SMS provider. With Bloomwire we register your sender ID with you as part of setup. It typically takes 1 to 2 business days once your documents are complete, subject to operator approval.
- Send a test to phones on different networks before your first campaign.
Tips for a sender ID customers trust
- Use the name on your shop sign or app, not an abbreviation only your team uses.
- Keep one sender ID per brand so customers learn to recognise it. Use a separate one only for a clearly separate brand.
- If your name is longer than 11 characters, shorten it in a way people still recognise, such as KandyMart for Kandy Mart Supermarket.
- Start every message with your brand name and, for promotions, include an opt-out.
Read more in Bulk SMS in Sri Lanka: the 2026 guide to sender IDs and rules, learn what an SMS gateway is, or see our SMS gateway and API.
Sources: Twilio, alphanumeric sender ID; AWS End User Messaging, sender IDs; provider reports for Sri Lanka summarised in the Unecast sender ID guide. Checked 14 November 2026.
Sender ID questions
What businesses ask us about SMS sender IDs in Sri Lanka.
What is the maximum length of an SMS sender ID?
11 characters. AWS and Sinch both state 3 to 11 characters for alphanumeric sender IDs in Sri Lanka, so keep yours between 3 and 11.
What characters can a sender ID use?
Letters A to Z (upper or lower case) and numbers 0 to 9, with at least one letter. Some providers also accept a space or a hyphen and others do not, so the safest sender ID uses only letters and numbers. Sinhala and Tamil letters cannot be used.
Can I use a phone number as my sender ID in Sri Lanka?
It is not dependable. Twilio reports that numeric sender IDs to Dialog, Etisalat and Hutch are blocked from 29 July 2026, and Vonage and LINK Mobility report that numeric senders are overwritten on Dialog. A registered alphanumeric sender ID is the dependable choice.
What are the sender ID restrictions in Sri Lanka?
Alphanumeric sender IDs must be registered with the main networks before you send. Generic names such as INFO or SMS are not accepted, the sender ID should match your brand, and providers report that your brand name should also appear in the message text.
How do I register a sender ID in Sri Lanka?
Through your SMS provider. Providers ask for broadly the same details: the sender ID and what you will send, sample messages that include your brand name, a business registration document and, if the link between the name and your company is not obvious, proof of your right to the brand. With Bloomwire we register it with you as part of setup.
How long does sender ID registration take?
With Bloomwire, sender ID registration typically takes 1 to 2 business days once your documents are complete, subject to operator approval.
Is this sender ID checker free?
Yes. It runs in your browser, nothing you type is sent to Bloomwire and there is no sign-up. It applies the common rules published by SMS providers; the final decision on any sender ID is made by the networks.
