Join the world's most connected network

With the recent acquisition of Lumen EMEA, we are now the largest pure-B2B digital infrastructure company in Europe. In combination with Lumen, we operate AS3356, the global internet backbone and the most peered network globally - based on CAIDA rankings.

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Featured whitepaper

Go from Legacy to Limitless

From modernisation & cost reduction to simplification & automation, learn how to align your network infrastructure with your business objectives for maximum impact.

Get the guide
Colt & Lumen integration

IDC reports on the uniting of networks

IDC look into the key aspects of our integration with Lumen EMEA and share their perspective on the drivers, progress so far and areas that we're focusing on.

Read paper two
Our ESG strategy

The 2023 Colt Sustainability Report

'We can change the world' is one of our core values, and it informs, shapes and inspires everything that we do. Nowhere is this better reflected than in our Sustainability Report.

Read our report

We're everywhere you want to be.

We're Colt, the global digital infrastructure company that delivers extraordinary connections with genuine care.

Powered by amazing people, like-minded partners and innovative technology, Colt is driven by its purpose: to put the power of the digital universe in the hands of our customers.

See our network coverage

32k+

Enterprise buildings directly connected via Colt's own fibre globally.

1100+

DCs, Clouds & Carrier Hotels connected than any other provider in Europe, Asia & USA.

27k+

Customers getting industry-leading experiences worldwide.

230+

Cities connected to our network with 50 deep metropolitan area networks globally.

900+

Network to network interfaces with other global operators, ensuring consistency.

250+

Connected PoPs worldwide, with connectivity to global cloud providers.

Solutions that power digital transformation

Dedicated Cloud Access

Connect to cloud service providers >

Enable intelligent, scalable connectivity to global cloud providers in minutes with a range of connection options.

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Build resilient digital infrastructure >

Achieve the very highest level of network performance with our Optical backbone solutions.

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Scale your bandwidth On Demand >

Boost your network capabilities to cope with increases in demand, and pay by the hour.

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Connect your collaboration & voice services >

Evolve your voice and unified communications infrastructure with a range of packages & add-ons.

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Connect to global financial markets >

Enable trading success with secure, low-latency networking, exchange connectivity & market data services.

Managed Firewall

Keep your core & edge networks secure >

Protect your data and network with next-generation cybersecurity services, both on-prem & cloud-based.

SD WAN Multi-cloud

Explore our cloud solutions >

With our portfolio of cloud services, we'll help design and deliver robust, scalable platforms to host and manage critical applications.

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Put your network in safe hands with our range of managed and professional services >

Let Colt design, integrate maintain your networking functions. We take care of your digital infrastructure, while you focus on growing your business.

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What makes us different?

Colt is your one-stop-shop for network and voice services, delivering a harmonised service portfolio, customised to suit your business:

Our comprehensive SLAs provide targets for service delivery, availability and time to settle payments - all supported by competitive guarantees 

Our award-winning customer service is backed up by some of the best Net Promoter Scores in the industry

We're recognised by more than 100 independent industry awards and counting

Our On-Demand services provide fast delivery, network agility, cost reductions and price flexibility 

Why choose Colt?

"The overall evaluation of the service received is positive in two ways: first, due to the technical quality of the product in terms of its strength, consistency and security, and second, in terms of the advice and assistance received during both the pre- and post-sales stages."

Javier Bartolome

Technology Director, IMSolutions

"The Colt infrastructure is robust, Colt controls it end-to-end, and we get excellent support from our account and service managers who really understand our business."

Amanda Thomas

VP Telecoms EMEA, Intercall

"Colt has been a real partner throughout the years we've been working together, always ensuring that its services have kept pace with growth in our business. The people I deal with directly at Colt understand my needs. We have a smooth, efficient relationship."

Marc Conte

SVP of IT, Louvre Hotels

"We know that Colt focuses on enabling its customers to meet their goals, rather than purely technological aspects of any project. This philosophy fits excellently with the service understanding of the [Berlinale] festival"

Dieter Kosslick

Director, Berlinale
Read our case studies

We're everywhere you want to be.

After our acquisition of Lumen EMEA, we're now the largest pure B2B digital infrastructure company in Europe. Enquire today and be a part of the world's most connected network.

Check your connectivity
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