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


Source invests in Colt’s scalable IT and network infrastructure solution to support over $500 billion worth of transactions Source UK Services Ltd, an independent fund promotion firm specialising in exchange-traded products, they enlisted Colt’s help to manage infrastructure challenges due…

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