Fully managed, high quality end-to-end transparent data transmission service operating at speeds of up to several 100G’s.

Private Wave

Secure, flexible and high performance private optical networking built on customer-dedicated WDM equipment and fibre infrastructure.


Providing ultra high bandwidth connectivity, Colt Spectrum delivers the flexibility and control of a long haul fibre network, without the overheads of Dark Fibre.

Dark Fibre

Colt’s dark fibre network is the most extensive and reliable in Europe. We cover 51 metropolitan areas which are interconnected by our 38,000km network.

Call us

+44 (0) 20 7863 5510

Live chat with sales

For all your purchase enquiries.
Monday - Friday 9am-5pm

Chat with us

Contact our business sales team