IN VoIP services in 13 European countries over our award-winning network.

Leverage your VoIP investments with Colt’s Service Provider Portfolio. With a single VoIP connectivity manage all your inbound traffic for your Intelligent Network (IN) services across Europe. We collect your IN VoIP calls (Freephone, Shared Cost, or IN Geo) in 13 European countries and deliver them to your VoIP platform over our award-winning carrier-grade Network.

Cost Effective

Manage costs better with one Pan-European partner for all your IN service numbers. Our tools also make it easy to manage and bill. With more than 20 years’ regulatory experience, and our award-winning network, we are the European partner of choice for IN service numbers.


Don’t be constricted by your partner. We help you create the best service for you, by offering a choice of VoIP connectivity and IN service numbers. Our IN services are regulatory compliant and support all country specific rules and local laws across Europe.


It’s important for you to be able to maintain control. Our B2B interface, Cocom, gives resellers twice daily unrated Call Detail Records (CDRs).

Scale with confidence. Our IN services can support high-volume traffic over a single IP connectivity for all your target countries.


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Contact us about IN over Carrier VoIP:

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+44 (0) 20 7863 5510

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 Roberta, Internal Communications Specialist

“As a fairly new employee, I must say that Colt is like a roller coaster. It is fast paced and thrilling, sometimes it makes you want to scream with excitement or hold your breath before the next turn, but one thing is certain – at the end of the day, you can’t wait for the next ride! one aspect which has made my experience with Colt really positive is the smart and motivated people working here.”

Careers at Colt
Colt is a convenient one-stop shop for network and numbers in the 13 countries from which the majority of our European conferencing traffic comes. Amanda Thomas
VP Telecoms EMEA, InterCall