Looking for the best Dark Fiber providers in London? Here's your ultimate guide to making an informed choice.
What is Dark Fiber?
Dark Fiber, also known as 'unlit fiber' or 'black fiber', refers to fiber optic cabling that has been laid by telecommunications providers but remains unused. Initially installed in the 1980s and 1990s, these cables were buried in excess to save future costs. Today, they are leased or sold to enterprises needing high-speed, private networks.
Dark Fiber providers are inherently location-based, relying on the availability of specific network infrastructure in a given area. Proximity to major cities increases the likelihood of access, but even then, connections depend on the presence of unused cable and accessible splice points.
Overview of Providers in London Offering Dark Fiber
There are many Dark Fiber providers to choose from in London, with an estimated 108 available based on Lightyear’s network intelligence—the industry’s most comprehensive dataset.
Actual provider availability also depends on fiber infrastructure near a specific address—so while many exist citywide, not all are quote-ready for every location. Comparing options can quickly become overwhelming.
To help simplify your research, we've compiled a definitive list of providers offering Dark Fiber in London, which you can explore below.
You can also schedule a demo with the Lightyear team for expert support navigating telecom procurement. Provider availability differs significantly by location, and Lightyear’s network intelligence helps businesses identify the right-fit options based on real infrastructure data.
Local Telcos in London with Dark Fiber
Local telcos are telecommunications companies that offer wireline telephone services throughout the London region and possess extensive fiber infrastructure, making them ideal providers for Dark Fiber. These companies can offer service across larger areas, while regular providers may only have coverage in specific regions of the city.
The local telcos in London that offer Dark Fiber are:
- AT&T: AT&T is a leading telecommunications company offering wireless, internet, and TV services. They provide a range of plans and devices, including the latest smartphones and high-speed internet options.
- Bell Canada: Bell is Canada's largest communications company, providing consumers and businesses with solutions for all their communications needs.
- BrightSpeed: BrightSpeed offers fast and reliable fiber and broadband internet plans, with promotional offers like three free months of fiber internet and $20 off for six months on certain plans.
- Frontier Communications: Frontier Communications offers fiber internet, TV, and phone services. They provide various internet plans, including high-speed fiber options, and additional services like TV streaming and phone services.
- Windstream: Kinetic by Windstream offers residential fiber internet with high speed, reliability, and security, along with voice services.
Local Cable Companies in London with Dark Fiber
Local cable companies originally built cable television infrastructure throughout London, which they now use to deliver ISP and business connectivity services. While their residential services typically rely on coaxial cables, their enterprise offerings—like Dark Fiber—are usually delivered over fiber infrastructure. Availability depends on the cable provider's network footprint, with some services like DIA offering broader coverage than others. Often, a city’s local cable companies, like their local telcos, will be able to provide Dark Fiber connectivity throughout the city.
The cable companies in London that offer Dark Fiber are:
- Optimum: Optimum offers high-speed fiber internet, TV, and mobile phone services with various plans and promotional offers. They provide reliable connectivity solutions for residential and business customers, ensuring high performance and customer satisfaction.
- Rogers Communications: Rogers Communications is a leading Canadian telecommunications and media company offering mobile, internet, TV, and home security services. Known for its reliable network, Rogers provides a range of plans and bundles to meet customer needs.
- Spectrum: Spectrum offers high-speed internet, mobile, cable TV, and home phone services. They provide various internet plans with no contracts, and options for bundling services for additional savings.
- Virgin Media O2: Virgin Media O2 combines the UK's favourite mobile network operator with a broadband network offering the nation's fastest widely-available speeds, aiming to upgrade the UK's connectivity and provide enhanced services.
Other Network Providers with Dark Fiber in London
Finally, a network provider is a company that delivers Dark Fiber by leveraging a mix of technologies to offer flexible, business-focused solutions. Unlike local telcos and cable companies with citywide infrastructure, these providers may only cover specific areas depending on network availability.
There are many network providers in London that offer Dark Fiber to choose from. Here's a quick look at all of them based on our network intelligence:
- 2pifi: A provider specializing in high-speed internet solutions for residential and business customers.
- 4th Utility: Offers full-fiber broadband services to homes and businesses across the UK.
- ACN: A global leader in direct selling of telecommunications, energy, and essential services for home and business.
- Agile Networks: Provides hybrid fiber wireless broadband networks to underserved areas.
- Appalachian Wireless: Offers wireless communication services in Eastern Kentucky.
- Arelion: Delivers global connectivity solutions with a focus on high-performance networks.
- ASK4: Specializes in high-speed internet services for multi-tenant buildings.
- Auracom: Provides internet and communication services to rural and remote areas.
- Avelacom: Offers low-latency connectivity and IT infrastructure solutions for financial markets.
- Bridge Fibre: Delivers high-speed internet and telephony services to business parks and multi-tenant buildings.
- Bruce Telephone Company: Provides telecommunications services in rural areas of Ontario, Canada.
- BSO: Specializes in global network infrastructure and connectivity solutions for financial services.
- Carry Telecom: Offers affordable high-speed internet services across Canada.
- China Unicom: A major Chinese telecommunications operator providing a wide range of services.
- CIK Telecom: Provides high-speed internet, home phone, and TV services in Canada.
- CityFibre: The UK’s largest alternative provider of wholesale fiber network infrastructure.
- CMC Networks: Offers global connectivity solutions with a focus on emerging markets.
- Commsworld: Provides high-performance connectivity and cloud solutions across the UK.
- County Broadband: Specializes in delivering full-fiber broadband to rural communities in the UK.
- Crosslake Fibre: Develops submarine and terrestrial fiber-optic cable systems.
- Eastlink: Offers internet, TV, and phone services across Canada.
- EBOX: Provides internet, phone, and TV services with a focus on customer satisfaction.
- EH!tel Networks: Delivers high-speed internet and communication services to rural areas in Ontario.
- Epsilon: Specializes in global connectivity and communication services for enterprises.
- EXA Infrastructure: Provides digital infrastructure solutions across Europe and North America.
- Execulink Telecom: Offers internet, TV, phone, and mobility services in Ontario, Canada.
- ExteNet Systems: Designs and operates distributed networks for wireless and fiber connectivity.
- FibreNest: Provides full-fiber broadband services to new build homes in the UK.
- Fibrenoire: Specializes in fiber-optic connectivity services for businesses in Quebec and Ontario.
- Fido Solutions: Offers mobile and internet services with a focus on flexibility and affordability.
- Freedom Mobile: Provides affordable mobile services across Canada.
- Gamma Telecom: Delivers voice, data, and mobile services to businesses in the UK.
- Gigaclear: Specializes in delivering ultrafast full-fiber broadband to rural communities in the UK.
- GO internet: Provides high-speed internet services in Italy using wireless and fiber technologies.
- HD Telecom: Offers internet and communication services in Quebec, Canada.
- Huge Networks: Provides connectivity and communication solutions across South Africa.
- Hughes: Specializes in satellite internet services for residential and business customers.
- Intelliwave: Offers high-speed internet and communication services in rural areas of Ohio.
- IP River: Provides internet and communication services with a focus on reliability and performance.
- IPTP Networks: Delivers global connectivity and IT infrastructure solutions for enterprises.
- Iristel: Offers VoIP, internet, and communication services across Canada.
- ISP Canada: Provides internet and communication services in Ontario, Canada.
- Juice Broadband: Delivers high-speed internet services to rural and underserved areas in the UK.
- Jurassic Fibre: Specializes in full-fiber broadband services for homes and businesses in the UK.
- Managed Network Systems: Offers internet, phone, and IT services in Ontario, Canada.
- Megaport: Provides global network connectivity and cloud services for enterprises.
- Merula: Offers internet and communication services with a focus on business solutions.
- NEOS Networks: Delivers high-capacity connectivity and cloud services across the UK.
- Netcrawler: Provides internet and communication services in Canada.
- NetIX Communications: Offers global internet exchange and connectivity services.
- NFTC: Provides internet, TV, and phone services in rural areas of Ontario, Canada.
- NYnet: Delivers high-speed broadband and connectivity solutions across North Yorkshire.
- open eir: Ireland’s largest wholesale provider of fixed and mobile telecommunications services.
- Orbital Net: Offers high-speed internet and communication services in the UK.
- OTEGLOBE: Provides international wholesale telecommunications services in Southeast Europe.
- OXIO: Offers internet and communication services with a focus on transparency and customer satisfaction.
- Paratus: Delivers connectivity and communication solutions across Africa.
- PCCW Global: Provides global connectivity and communication solutions for enterprises.
- Persona Communications: Offers internet, TV, and phone services in Canada.
- Pinnacom: Specializes in communication and IT solutions for businesses.
- PlusNet: Provides affordable broadband and phone services in the UK.
- Point Broadband: Offers high-speed internet services to rural and underserved areas in the US.
- PTCI: Provides internet, TV, and phone services in the Oklahoma Panhandle.
- Ranch Wireless: Offers high-speed internet services to rural areas in Texas.
- Resound Networks: Delivers high-speed internet services to rural and underserved areas in the US.
- Retelit: Provides data and infrastructure services across Italy.
- RETN: Offers international connectivity and network services across Europe and Asia.
- SaskTel: Provides internet, TV, and phone services in Saskatchewan, Canada.
- Securus Communications: Specializes in secure communication and IT solutions for businesses.
- Sohonet: Offers connectivity and collaboration solutions for the media and entertainment industry.
- Standard Broadband: Provides high-speed internet services to rural and underserved areas in Ontario, Canada.
- Starlink: Delivers high-speed satellite internet services globally.
- Sunwire: Offers internet, phone, and TV services in Northern Ontario, Canada.
- Swish Fibre: Specializes in full-fiber broadband services for homes and businesses in the UK.
- T-Mobile: Provides mobile and internet services with a focus on innovation and customer satisfaction.
- TalkTalk: Offers affordable broadband, TV, and phone services in the UK.
- Telcan: Provides international calling and communication services.
- Telia Company: Offers telecommunications services across the Nordic and Baltic regions.
- Telstra: Australia’s leading telecommunications and technology company.
- TELUS: Provides internet, TV, and phone services across Canada.
- Terago Networks: Offers cloud, colocation, and connectivity services for businesses in Canada.
- Toob: Specializes in full-fiber broadband services for homes and businesses in the UK.
- Uno Communications: Provides internet and communication services in Italy.
- Vaioni: Offers connectivity and cloud services for businesses in the UK.
- Verizon: Provides global communication and technology solutions for enterprises.
- Vianet: Offers internet, TV, and phone services in Ontario, Canada.
- Videotron: Provides internet, TV, and phone services in Quebec, Canada.
- Virtual1: Delivers high-capacity connectivity and cloud services for businesses in the UK.
- VMedia: Offers internet, TV, and phone services with a focus on affordability and flexibility.
- Vodafone: A global leader in mobile and fixed network services.
- Voneus Limited: Specializes in delivering high-speed broadband to rural communities in the UK.
- VTX1: Provides internet and communication services in rural areas of Texas.
- WaveDirect Telecommunications: Offers high-speed internet services to rural and underserved areas in Ontario, Canada.
- Wessex Internet: Specializes in full-fiber broadband services for rural communities in the UK.
- YouFibre: Provides ultrafast full-fiber broadband services to homes and businesses in the UK.
- Zayo: Offers global bandwidth connectivity and colocation services.
- Zen Internet: Provides internet, phone, and hosting services with a focus on customer satisfaction.
- Zone Broadband: Offers high-speed internet services to homes and businesses in the UK.
Overall Connectivity Score in London: High
A high connectivity score in London signifies robust provider availability, extensive fiber infrastructure, and healthy competition. This benefits businesses seeking Dark Fiber by offering more choices and competitive pricing. However, selecting the right provider still hinges on location-specific availability and business needs, making tools like Lightyear essential for streamlining the selection process.
Use Lightyear to Find the Perfect Provider
Interested in accessing the full list of providers at the best prices? Lightyear simplifies the process of finding the best Dark Fiber providers in London by leveraging comprehensive network intelligence. Our platform offers real-time data, location-specific availability, and expert support to help you make informed decisions effortlessly.
