Asia
SIP Trunk Sri Lanka — +94 Termination & DID Numbers
Sri Lanka's traffic is a mix of diaspora calling from the Gulf and Europe and a growing outsourcing sector around Colombo. Mobiles have nine digits after the 0 and start with 7, and Colombo landlines use area code 011.
Overview
Routing calls to Sri Lanka
Traffic to Sri Lanka leaves our SBCs on more than one upstream carrier per prefix. If a leg toward Colombo or Kandy starts returning 503s or long post-dial delay, the next attempt goes to another carrier automatically. Calls to Galle, Jaffna and Negombo follow the same failover logic.
Numbering in Sri Lanka is managed by TRCSL. We terminate to geographic and mobile ranges and price each one separately on the rate sheet. Inside the country, numbers are dialled with a 0 trunk prefix. Strip it before you send the call, and send 94 followed by the national number.
Some Sri Lanka number ranges can be activated with basic company details, while others need proof of address. Tell us the city and number type, and we will confirm what is needed before you order.
What you get
What you get in Sri Lanka
One account and one balance, with the same SBCs for termination and inbound numbers.
CLI route tier
Caller ID delivered end to end on +94 calls. Use it for sales, support and any traffic where answer rates matter.Non-CLI route tier
A lower-cost tier where caller ID delivery is not guaranteed. Suitable for internal or transactional traffic that does not depend on the CLI.Number types
Geographic, Mobile. DID availability varies by range and city.Codecs
G.711a/u and G.729 on every route, G.722 and Opus where the far end supports them. T.38 for fax.Channels on demand
Concurrent call limits are set per account and raised as your traffic grows. No fixed channel bundles.Multi-carrier failover
Every +94 prefix is mapped to more than one carrier. Failed attempts move to the next one automatically.
Number formats
How to dial Sri Lanka from your PBX
Send E.164 digits. The sample number below shows the format only.
| Format | Example | Notes |
|---|---|---|
| International (E.164) | +94 11 234 5678 | How the number is written and stored. |
| Sent from your PBX | 94112345678 | E.164 digits with no plus, prefixed by your tech prefix if your account uses one. |
| With 00 exit code | 00 94 11 234 5678 | Accepted on the trunk. We normalise it to E.164. |
| National format | 011 234 5678 | Dialled inside Sri Lanka. Strip the trunk prefix before sending. |
Compliance
Sri Lanka rules to know
What applies before your first call or your first DID goes live.
Compliance box
- Regulator
- TRCSL
- Caller ID
- A valid CLI that you are entitled to use is required on CLI routes. Spoofed or unallocated numbers are blocked.
- DID KYC
- Sometimes required
Rules change — our team confirms current requirements before activation.
Use cases
Who uses Sri Lanka routes
- 01
Diaspora calling from the Middle East and UK into Sri Lankan mobiles
- 02
Finance and accounting outsourcing firms in Colombo
- 03
Tourism operators in Galle and Kandy taking international enquiries
Setup
Start calling Sri Lanka in 3 steps
- 01
Top up $200
Open a prepaid account and add balance by USDT (TRC20), BTC or card. - 02
Add your trunk
Whitelist your PBX IP or create digest credentials, then point your outbound route at our SBC. - 03
Dial +94
Send 94 + national number in E.164 and check the CDR for your first test call.
Further reading: ASR and ACD Explained: How to Judge a VoIP Route
FAQ
Sri Lanka SIP trunk questions
How do I dial Sri Lankan mobiles?
Drop the 0 and send 94 7x followed by 7 digits.
Who regulates Sri Lankan telecoms?
The TRCSL (Telecommunications Regulatory Commission of Sri Lanka).
What is the Colombo area code?
011, so a Colombo number is +94 11 followed by 7 digits.
Can I get Sri Lankan DIDs?
Limited ranges may be available. Ask sales.
