Europe
SIP Trunk Turkey — +90 Termination & DID Numbers
Istanbul has two area codes, 212 on the European side and 216 on the Asian side, a detail that catches out dial plans built on a single-code-per-city rule. Turkish DIDs are tightly controlled by BTK and usually need a local entity, so confirm availability before you plan inbound services.
Overview
Routing calls to Turkey
Whether you are calling a desk phone in Istanbul or a mobile in Izmir, Bursa and Antalya, the call is routed by the longest matching +90 prefix and sent to the best-performing carrier for that range. When a carrier fails, the next one takes over, and the CDR shows exactly which leg carried the call.
Numbering in Turkey is managed by BTK. We terminate to geographic, mobile and toll-free 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 90 followed by the national number.
Outbound calls to Turkey work on a standard account. Inbound DIDs are restricted, and options depend on licensing and current stock, so our team confirms availability before taking an order.
What you get
What you get in Turkey
One account and one balance, with the same SBCs for termination and inbound numbers.
CLI route tier
Caller ID delivered end to end on +90 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, Toll-free. 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 +90 prefix is mapped to more than one carrier. Failed attempts move to the next one automatically.
Number formats
How to dial Turkey from your PBX
Send E.164 digits. The sample number below shows the format only.
| Format | Example | Notes |
|---|---|---|
| International (E.164) | +90 212 123 45 67 | How the number is written and stored. |
| Sent from your PBX | 902121234567 | E.164 digits with no plus, prefixed by your tech prefix if your account uses one. |
| With 00 exit code | 00 90 212 123 45 67 | Accepted on the trunk. We normalise it to E.164. |
| National format | 0212 123 45 67 | Dialled inside Turkey. Strip the trunk prefix before sending. |
Compliance
Turkey rules to know
What applies before your first call or your first DID goes live.
Compliance box
- Regulator
- BTK
- Caller ID
- A valid CLI that you are entitled to use is required on CLI routes. Spoofed or unallocated numbers are blocked.
- DID KYC
- Check with sales
Rules change — our team confirms current requirements before activation.
Use cases
Who uses Turkey routes
- 01
Turkish-language customer service for e-commerce and airlines
- 02
Outbound calling to Turkish 5xx mobiles on CLI routes
- 03
Diaspora traffic from Germany and the Netherlands into Turkey
Setup
Start calling Turkey 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 +90
Send 90 + national number in E.164 and check the CDR for your first test call.
Further reading: What Is a SIP Trunk? A Plain-English Guide for 2026
FAQ
Turkey SIP trunk questions
Why does Istanbul have two area codes?
212 covers the European side and 216 the Asian side of the city.
Can I get Turkish DIDs?
Availability is limited and usually requires a local entity. Ask sales for current options.
Who regulates Turkish telecoms?
BTK (Information and Communication Technologies Authority).
How do I dial Turkish mobiles?
Send 90 followed by the 10-digit number starting 5.
