Sender ID registration in Sri Lanka
What TRCSL and the operators in Sri Lanka require for SMS sender IDs, how long approval takes, the accepted formats and sending rules, and how OmniChannels.ai registers yours.
- Registration
- Set by the operators
- Typical lead time
- 5–10 business days
- Alphanumeric sender ID
- Yes
- Regulator
- TRCSL
Short answer
In Sri Lanka, sender ID requirements are set by the mobile operators (Dialog Axiata and Mobitel), with TRCSL as regulator. Approval typically takes 5–10 business days. Alphanumeric IDs of up to 11 characters are accepted. OmniChannels.ai handles the filing across 3 operators and confirms current rules during onboarding.
Sender ID rules in Sri Lanka at a glance
| Regulator | Telecommunications Regulatory Commission of Sri Lanka (TRCSL) |
|---|---|
| Registration required | Set by the operatorsBroadNet confirms the current requirements during onboarding |
| Typical lead time | 5–10 business days |
| Alphanumeric sender ID | YesLatin or local-script letters, up to 11 characters |
| Numeric long code / short code | Not listed for this market; alphanumeric is the documented format |
| Accepted formats | Alphanumeric (local script supported), up to 11 chars |
| Promotional sending hours | 08:00–20:00 local timeTRCSL's promotional-messages guidelines bar promotional messages from 20:00 to 08:00. Transactional 24/7. |
| Opt-in | Verifiable opt-in required, with traffic categorised by use case at the time of registration. DLT-style template approval applies in several markets. |
| Opt-out | STOP keyword and DND-registry suppression applied automatically. Records retained per regulator requirements. |
| Operators we reach | Dialog Axiata, Mobitel and Hutch Sri Lanka |
| Last reviewed | 29 September 2026Sources: TRCSL, TRCSL promo guidelines |
From BroadNet's regulatory research, last reviewed 29 September 2026. Rules change: we confirm them for your sender ID and traffic during onboarding.
Official sources: TRCSL · TRCSL promo guidelines
How to register your sender ID in Sri Lanka through OmniChannels.ai
Sender ID registration fees are passed through at cost. We confirm the documents and the current rules for your traffic during onboarding.
Need the authorization letter?
Generate a ready-to-sign LOA or NOC for this country in English, Arabic or both. Free, and your details never leave your browser.
Generate your authorization letter- 1
Choose and check your sender ID
Pick a sender ID that matches your brand: Latin or local-script letters, up to 11 characters. Test it in the free sender ID checker first.
- 2
Send us your company details and use case
Tell us the legal entity, brand and what each sender ID will send (OTP, transactional or promotional). We confirm which supporting documents are currently needed.
- 3
We file with the operators
We prepare and submit the application. Current process in Sri Lanka: BroadNet confirms the current requirements during onboarding.
- 4
Approval and test messages
Approval typically takes 5–10 business days. Once approved we send test messages on Dialog Axiata, Mobitel and Hutch Sri Lanka and check the sender ID displays correctly.
- 5
Go live
Send through the REST API, SMPP or campaigns. Promotional messages go out 08:00–20:00 local time. Opt-out handling is applied to every promotional message.
Common reasons a sender ID is rejected in Sri Lanka
- Too long: sender IDs here are up to 11 characters.
- Generic words instead of a brand, such as INFO, SMS, OTP, ALERT: regulators usually refuse them.
- Mixing scripts in one ID: Latin or local-script letters are accepted, but pick one script per sender ID.
- Spaces or symbols such as _ & ! ( ): many operators strip or refuse them; use a hyphen or nothing.
Run your proposed sender ID through the free sender ID checker, preselected for Sri Lanka, before you apply.
Register your sender ID in Sri Lanka
Send us your brand and use case. We file the sender ID for 3 operators, run the test messages and connect it to the same API, SMPP and campaign tools you use for every other market.
Sender ID in Sri Lanka: questions
Do I need to register a sender ID in Sri Lanka?
Yes, in practice: the mobile operators in Sri Lanka set the sender ID requirements rather than a central registry. BroadNet confirms the current requirements during onboarding.
How long does sender ID registration take in Sri Lanka?
Typically 5–10 business days, depending on the operator and the documents provided. We confirm the current timeline for your sender ID during onboarding.
Can I use an alphanumeric sender ID in Sri Lanka?
Yes. Alphanumeric sender IDs are accepted: Latin or local-script letters, up to 11 characters. Accepted formats: Alphanumeric (local script supported), up to 11 chars.
When can I send promotional SMS in Sri Lanka?
Promotional window: 08:00–20:00 local time. TRCSL's promotional-messages guidelines bar promotional messages from 20:00 to 08:00. Transactional 24/7.
What consent and opt-out rules apply in Sri Lanka?
Verifiable opt-in required, with traffic categorised by use case at the time of registration. DLT-style template approval applies in several markets. STOP keyword and DND-registry suppression applied automatically. Records retained per regulator requirements.
Who regulates SMS sender IDs in Sri Lanka?
Telecommunications Regulatory Commission of Sri Lanka (TRCSL), together with the mobile operators (Dialog Axiata, Mobitel and Hutch Sri Lanka). Official sources: TRCSL, TRCSL promo guidelines.
Related for Sri Lanka
Sender ID registration in nearby markets
- Bangladesh · 5–10 business days
- Cambodia · 7–14 business days
- Hong Kong · No pre-registration
- India · 3–7 business days (DLT header registration)
- Indonesia · 5–10 business days
- Malaysia · 5–7 business days
- Nepal · 7–14 business days
- Pakistan · 7–14 business days
- All countries
Data: BroadNet regulatory research, reviewed 29 September 2026. URL: https://omnichannels.ai/sender-id/sri-lanka/