Europe
SIP Trunk Spain — +34 Termination & DID Numbers
Spanish numbers are a fixed nine digits with no trunk prefix: landlines begin with 8 or 9 and mobiles with 6 or 7. Since the 2023 telecoms law, unsolicited commercial calls need prior consent, which has changed how outbound teams in Spain work.
Overview
Routing calls to Spain
Most Spain traffic we see ends in Madrid, Barcelona and Valencia, Seville, Bilbao and Málaga. Each +34 prefix is mapped to at least two carriers, and we watch ASR, ACD and PDD per prefix so a degrading route is replaced before your agents notice.
CNMC sets the Spain numbering plan, and our prefix tables follow it closely. Supported number types: geographic, national, mobile and toll-free. There is no trunk prefix to strip: send 34 followed by the national number as written.
For inbound numbers in Spain, plan on paperwork: proof of address and company or identity documents are usually required before a DID goes live. Termination needs no documents beyond normal account checks.
What you get
What you get in Spain
One account and one balance, with the same SBCs for termination and inbound numbers.
CLI route tier
Caller ID delivered end to end on +34 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, National, 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 +34 prefix is mapped to more than one carrier. Failed attempts move to the next one automatically.
Number formats
How to dial Spain from your PBX
Send E.164 digits. The sample number below shows the format only.
| Format | Example | Notes |
|---|---|---|
| International (E.164) | +34 912 345 678 | How the number is written and stored. |
| Sent from your PBX | 34912345678 | E.164 digits with no plus, prefixed by your tech prefix if your account uses one. |
| With 00 exit code | 00 34 912 345 678 | Accepted on the trunk. We normalise it to E.164. |
| National format | 912 345 678 | Dialled inside Spain. There is no trunk prefix. |
Compliance
Spain rules to know
What applies before your first call or your first DID goes live.
Compliance box
- Regulator
- CNMC
- Caller ID
- A valid CLI that you are entitled to use is required on CLI routes. Spoofed or unallocated numbers are blocked.
- DID KYC
- Usually required
- Note
- Geographic DIDs usually need a local address or proof of presence in the number's area.
Rules change — our team confirms current requirements before activation.
Use cases
Who uses Spain routes
- 01
Spanish-language contact centres in Madrid and Barcelona serving Spain and LATAM
- 02
Hospitality and tourism businesses taking calls in Málaga and Valencia
- 03
900 freephone lines for national customer service
Setup
Start calling Spain 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 +34
Send 34 + national number in E.164 and check the CDR for your first test call.
Further reading: SIP Error Codes 401, 403, 404, 408, 480, 486, 503: Causes and Fixes
FAQ
Spain SIP trunk questions
Is there a trunk prefix in Spain?
No. All numbers are 9 digits and dialled the same domestically and internationally after +34.
Can I make cold sales calls in Spain?
Spanish law requires prior consent for unsolicited commercial calls. Check your lists before sending outbound sales traffic.
Who is the regulator?
The CNMC (Comisión Nacional de los Mercados y la Competencia) oversees telecom markets.
Do Spanish DIDs need an address?
Usually. Geographic numbers generally need an address in the province.
