Wholesale VoIP termination
Best routes to national and international destinations through direct interconnection with tier-1 carriers. Real-time ASR/ACD quality metrics.
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Wholesale VoIP operator
The house of VoIP communications
Services, products and solutions for VoIP operators and businesses that want to roll out professional telephony without the hassle. White-label, 24×7 support and 15+ years of experience
500K+
users served worldwide
15+
years in the telecoms industry
200+
countries with available DID numbering
Everything you need to run VoIP
Four products designed for operators and integrators. They work on their own or as a single piece of your infrastructure
White-label multi-tenant cloud PBX
Multi-client virtual PBX platform with unified control panel. Postpaid, prepaid, SIP trunking, click-to-call, fax-to-mail and more.
Learn moreNumbering & portability
National VoIP numbering (every Spanish province) and international DIDs (50+ countries), intelligent network and number portability. €0 setup, no commitment.
Learn moreDevelopment, integration & consulting
Custom solutions built on open standards. Communications outsourcing so your company can focus on its core business.
Learn moreSpanish operator, own infrastructure, flexible contract
An in-house network, a specialised human team and a commercial policy without small print
No commitment
€0 setup, cancel any time. No minimum usage, no penalties.
Provisioning in 12–48 h
Once we have your paperwork, your service is live in under two business days.
Full white-label
Your customers only see your brand. Configurable panels, domains and branding.
ISO certifications
ISO 20000 (IT service management) and ISO 27001 (information security).
Business and wholesale VoIP, without middlemen
The SIP House is the commercial brand of VoIPer Telecom, S.L., a telecommunications operator registered with the Spanish CNMC (the national telecoms regulator). For more than fifteen years we have developed and operated our own voice-over-IP infrastructure, which means we can deliver wholesale and enterprise services without resellers or technical intermediaries: when a customer signs with us, they're talking directly to the team that maintains the core.
Our catalogue serves two very different audiences on the same platform. The first are CNMC-licensed operators, ITSPs and traffic wholesalers: we provide high-capacity SIP trunking, national and international voice termination with real-time ASR/ACD monitoring, origination with authentic CLI, sub-assignable numbering and a multi-tenant operator portal. The second are SMBs, integrators and end users who need a white-label multi-tenant cloud PBX, Spanish and international DID numbering or a custom integration project.
Working with a Spanish operator has measurable advantages: low-latency, voice-dedicated routes; 24×7 support without international escalation; ability to sub-assign numbering under our CNMC heading; and verifiable regulatory compliance (Spanish General Telecommunications Law 11/2022, Law 25/2007 on retention of electronic communications data, GDPR and LOPDGDD). Our infrastructure is certified to ISO 20000 (IT Service Management) and ISO 27001 (Information Security), and is hosted in European hyperscale data centres with redundant power, cooling and network.
To get a quote within 48 hours or validate our route quality with a test, email info@thesiphouse.com or call +34 910 38 10 71.
What people ask us most
Do I need a CNMC licence to subscribe?
Only the wholesale service (termination, origination, sub-assignable numbering) requires you to be a CNMC-registered operator. For cloud PBX, your own DID numbers or consulting, no licence is required: any company can subscribe.
Is there a commitment or minimum spend?
No. Setup at €0, no minimum usage and no commitment. You can cancel at any time; cancellation takes effect at the end of the current billing period.
Which countries do you cover for numbering?
All Spanish provinces and over 50 countries: Germany, Argentina, Brazil, Chile, Colombia, United States, France, Italy, Mexico, United Kingdom and many more. Full list under products > numbering. If you don't see yours, ask us — we probably have it.
How long does activation take?
Between 12 and 48 hours after receiving documentation. Wholesale VoIP termination averages 24 hours; new numbering 12–48 hours; portabilities follow the regulated timelines set by the donor operator and the CNMC.
Do you handle number portability?
Yes. Inbound and outbound portability with every Spanish operator registered with the CNMC. Timelines are regulated; we handle the paperwork and keep you posted at every stage.