Building a network to support bandwidth-intensive business applications? Or creating your own backhaul network?

Colt’s dark fibre network is the most extensive and reliable in Europe. We cover 47 metropolitan areas which are interconnected by our 38,000km network. We’re confident our dark fibre network will meet any future business need.


Dark Fibre gives you maximum control and flexibility over your network, allowing your network to scale-up as your bandwidth requirements grow – providing virtually limitless capacity.


Dark Fibre services you can trust to perform. We invest heavily in our network. Which is why we’re used by many of the world’s leading carriers, operators, and service providers.

Cost Effective

Dark Fibre can provide a highly cost-effective way of managing your own network, enabling you to add bandwidth as your capacity requirements increase.

Dark Fibre datasheet

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Case Study

U-NEXT Corporation

U-NEXT selects Colt Wave as its low-latency, high-bandwidth data transfer solution for high-volume digital entertainment libraries…

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Meet Kostas, Product Management Associate

“I joined the Graduate scheme over a year ago and since then I’ve had the opportunity to work on many different projects. My role enables me to build relationships with other functions and meet colleagues across the globe. I get the the full experience of the amazing challenger culture at Colt.”

Careers at Colt
The project was a complete success and we achieved the goal we set. Collaboration with Colt was excellent. John Sudbury
CEO Ekovolt

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