SIP Trunk Spain from a CNMC-authorized National Operator — not a reseller
Más IP is a CNMC-licensed National Operator with direct interconnection with Movistar and Vodafone. Connect your PBX or platform to first-tier Spanish infrastructure: wholesale rates, direct 400 numbering assignment and ENS certification included.
Most SIP Trunk providers in Spain are resellers. Más IP is the operator.
Global VoIP providers usually route Spanish traffic through intermediate carriers. Each hop adds latency, reduces quality and adds margin. Más IP connects directly to Spanish networks through Movistar and Vodafone interconnection agreements.
| Global resellers | Más IP | |
|---|---|---|
| Regulatory status | Resellers / intermediaries | CNMC-licensed National Operator |
| Network access | Via tier-2 or tier-3 carriers | Direct Movistar + Vodafone interconnect |
| 400 numbering assignment | Through intermediaries | Direct assignment as licensed operator |
| ENS certification | Generally not held | Active ENS certification |
| Support | Ticket-based, international time zones | Spanish engineering team, 8:30-20:00 CET |
| Data location | Often non-EU servers | Spain — GDPR compliant |
SIP Trunk Spain — full service from a single operator
Voice termination
Inbound and outbound voice calls across Spain and international destinations, routed over Más IP’s own network infrastructure. G.711, G.729 and HD voice available.
Spanish numbering
- Geographic DIDs: Madrid, Barcelona, Valencia and all provinces.
- National non-geographic numbers: 900, 800, 901 and 902 replacement.
- 400 numbering for commercial outbound calls from 17 October 2026.
400 numbering — direct assignment
From 17 October 2026, outbound commercial calls in Spain must originate from the 400 range. Más IP assigns 400 numbers directly as a CNMC-authorized operator.
Flexible concurrent channels
Scale from 10 to 1,000+ concurrent channels. Suitable for SMEs, contact centers, predictive dialers and high-volume outbound operations.
Compatible with any SIP-standard PBX or platform
Enterprise PBX
Asterisk · FreePBX · Issabel · 3CX · Yeastar · Cisco CUCM · Avaya · Microsoft Teams Direct Routing.
Contact center platforms
Any SIP-compatible contact center or predictive dialer. High-volume operations receive configuration support from Más IP engineers.
Microsoft Teams
Connect Teams to the Spanish PSTN via Más IP’s certified SBC and direct Spanish operator infrastructure.
Five profiles that benefit most
International companies with Spanish operations
Local number presentation, better call quality to Spanish mobile and fixed lines, and direct CNMC compliance.
High-volume contact centers
Wholesale operator-to-operator pricing matters when monthly traffic reaches hundreds of thousands of minutes.
ISPs and telecom providers
Source Spanish voice capacity from a domestic operator with direct interconnection and numbering under one contract.
Companies needing 400 numbering
Commercial outbound operations in Spain need a direct path to 400 number assignment before October 2026.
Microsoft Teams users
Direct Routing with Spanish numbers, SBC infrastructure and regulatory compliance already in place.
Technical specifications
| Protocol | SIP (RFC 3261) |
|---|---|
| Transport | UDP, TCP, TLS |
| Codecs | G.711a, G.711u, G.729, G.722 (HD) |
| DTMF | RFC 2833, SIP INFO |
| Numbering | Geographic, non-geographic, 400 range |
| Emergency calls | 112 compliant |
| SLA | 99.9% uptime |
| Interconnection | Direct Movistar + Vodafone |
| Authentication | IP-based or SIP credentials |
| Encryption | SRTP + TLS on request |
| Data location | Spain — EU GDPR compliant |
Technical setup completed in 24-72 hours
Technical assessment
Share your PBX/platform details. Más IP reviews compatibility and prepares connection parameters.
Number assignment
Geographic, non-geographic and 400 numbering assigned where required.
Testing
Inbound/outbound calls, DTMF, codec negotiation, call quality and failover verified before go-live.
Go-live
Production traffic starts. Number portability is managed directly by Más IP as a licensed operator.
Frequently asked questions
Is Más IP a CNMC-licensed operator or a reseller?
Más IP is a CNMC-licensed National Operator, not a reseller. We hold the regulatory authorization directly and have our own interconnection agreements with Movistar and Vodafone.
What is the 400 numbering regulation?
From 17 October 2026, outbound calls with commercial intent in Spain must originate from the 400 number range. Más IP assigns it directly and configures it in your SIP Trunk.
Can Más IP provide SIP Trunk for Microsoft Teams Direct Routing?
Yes. Más IP provides certified SBC infrastructure for Teams Direct Routing with Spanish numbering and CNMC compliance.
What PBX systems are compatible?
Any SIP-standard PBX or platform, including Asterisk, FreePBX, Issabel, 3CX, Yeastar, Cisco CUCM, Avaya and Microsoft Teams.
Can Más IP port existing Spanish numbers?
Yes. Number portability from other Spanish operators is handled as part of onboarding, with no service interruption during transition.
Is the service GDPR compliant?
Yes. Call data and CDRs are stored on servers located in Spain, under Spanish and EU law.
Ready to connect to the Spanish PSTN directly?
Send us your technical setup details and expected volume. Más IP’s engineering team will review compatibility and provide a quote within 24 hours.