Colt Number Hosting; Pan-European SIP trunking services under your own brand. If you operate your own VoIP platform, our Number Hosting service enables you to build, integrate and sell your own solutions under your own brand – based on the unique Pan-European technical, process and regulatory expertise from Colt.

Number Hosting is a multi-national SIP trunking solution for outbound and inbound traffic, based on a single IP connectivity to your platform.


Our experts take care of all country specifics such as porting and full regulatory compliance including emergency call routing and lawful intercept. With 20 years expertise supplying full regulatory compliance across Europe including emergency call routing and lawful intercept, we are the compliance experts.

Our pan-European carrier-grade network ensure a high-quality of inbound and outbound calls. All through a single physical IP connectivity for all countries.


Grow your European VoIP business rapidly, with minimum effort and cost. Simply offer our quality Voice, UC or Cloud Communication Services under your own brand.

Maintain control of your end-customers and run your business more efficiently with the right- set of Pan-European tools.


Build your own VoIP services or integrate them into your UC / Cloud Solutions across multiple countries. You manage all calls from and to your end-customers over a single SIP trunk with Colt.

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Case Study

Case study Alpargatas

Well known for their famous Havaiana flip-flops, Alpargatas is an Brazilian footwear manufacturer who uses Colt network services.

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Meet Peppi, Product Manager

“It’s an exciting time here at Colt – our experienced team are helping wholesale customers leverage high bandwidth networks to provide business end-customers with market leading VoIP & IN services in Europe with our unique managed service wrap.”

Careers at Colt
If a customer wants to expand into a new country, we can too – I just have to make one call to Colt and everything’s taken care of. Jack Aronson
Global SIP Peering Manager, Masergy