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

Colt is an award-winning dark fibre provider, offering the most extensive and reliable network in Europe. We cover 51 metropolitan areas which are interconnected by our 38,000km network. We’re confident our dark fibre services will meet any future business need.

Scalable

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.

Quality

Dark Fibre network 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.

Learn more

Want to learn more about our optical services?
Check out the rest of our products below.

Wave – Optical Wavelength Service
Enable high bandwidth gigabit ethernet connections with Colt Wave Services. Leverage market opportunities and met the challenge of rising bandwidth demands.

Private Wave – Private Optical Network
Secure, flexible and high performance private optical networking built on customer-dedicated WDM equipment and fibre infrastructure.

Spectrum
Get ultra-high bandwidth connectivity with Colt Spectrum. The flexibility & control of a long-haul fibre network, without the overheads of Dark Fibre.

Dark Fibre datasheet

Live chat with Sales

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

Chat with us

Contact us about Dark Fibre Network:


Call a specialist

+44 (0) 20 7863 5510

Case Study
U-NEXT logo: wave services for U-NEXT

U-NEXT Corporation

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

Related Product
Optical fibre illustration

Spectrum

Providing ultra-high bandwidth connectivity, Colt Spectrum enables you to leverage your own investments in DWDM equipment, whilst benefiting from Colt’s extensive optical network reach and connectivity.

Blog

Digital transformation is more than raw bandwidth 

There’s no shortage of statistics acknowledging the scale of the challenge posed by global consumption of data, and they are all pretty daunting.

Careers
Technology jobs profile: product management

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 full experience of the amazing challenger culture at Colt.”

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

Awards & Accreditations

Global Carrier Awards: best SDN / NFV deployment
MEF Awards 2016: Service innovation of the year EMEA