Company lists · Data refreshed November 2026

Top 25 Fiber optic service providers based in the United Kingdom

RevenueBase identified 336 company matches for fiber optic service providers associated with the United Kingdom as of November 2026 and tracks 19,312 professional contacts across them, including 6,605 with verified work emails. London is the largest hub.

This list covers company matches for fiber optic service providers associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built
336Companies
19,312Contacts tracked
6,605Verified emails
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The 25 largest fiber optic service providers based in the United Kingdom

Ranked by team size
Top 25 of 336 company matches for fiber optic service providers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchReading, United KingdomHQ recorded Nov 6, 202610001+7,455 contacts →

Exact match

“We’re in the process of growing all parts of our business so we can connect more customers to the things and to the people they care about.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,0001,431 contacts →

Exact match

“At CityFibre, we’re building a new, intelligent, open-access fibre network, purpose built for the data age.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,0001,352 contacts →

Exact match

“Hyperoptic was founded in 2011 to shake up the broadband market, and we're proud to be forever in our customers' corner.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchRochdale, United KingdomHQ recorded Nov 6, 2026501-1,000539 contacts →

Exact match

“Zen is a B Corp certified telecommunications and technology service provider in the UK.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Nov 6, 2026501-1,000506 contacts →

Exact match

“Whichever way you look at it, we are London’s best broadband- London's fastest broadband network - London’s best quality broadband network (Opensignal)*- Which?”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500385 contacts →

Exact match

“euNetworks (@euNetworks) is a European provider of bandwidth infrastructure services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchBelfast, United KingdomHQ recorded Nov 6, 2026201-500341 contacts →

Exact match

“Our mission is to bring Full Fibre broadband to homes and businesses across Northern Ireland and Great Britain, especially to those who need it most.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Nov 6, 2026501-1,000321 contacts →

Exact match

“Interoute is part of EXA Infrastructure, the largest dedicated digital infrastructure platform connecting Europe and North America, and owns kilometres of fibre network across 34…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchUk, United KingdomHQ recorded Nov 6, 2026201-500317 contacts →

Exact match

“Get a better kind of broadband from YouFibre YouFibre is a full fibre broadband provider on a mission to bring gigafast broadband speeds to our customers.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchWest End, United KingdomHQ recorded Nov 6, 2026501-1,000305 contacts →

Exact match

“When it comes to business, there’s no city like London.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500284 contacts →

Exact match

“We’re here to power the ambitions of London enterprises with a dedicated 100Gbps fibre network, managed IT and cybersecurity services.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchOxford, United KingdomHQ recorded Nov 6, 2026201-500276 contacts →

Exact match

“Zzoomm is here to build a Full Fibre broadband network in your town; fit for the future, for everyone, right now.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200256 contacts →

Exact match

“We're bringing better internet to the UK.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchHull, United KingdomHQ recorded Nov 6, 2026201-500252 contacts →

Exact match

“Fast, reliable broadband.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchDroitwich, United KingdomHQ recorded Nov 6, 2026201-500217 contacts →

Exact match

“Founded in 2009, Airband is an independent internet service provider bringing superfast broadband to homes, business and industry in rural and hard-to-reach areas, with a rapidly…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchKenn, United KingdomHQ recorded Nov 6, 2026201-500207 contacts →

Exact match

“Welcome to Glide, the UK's leading business broadband provider specialising in hard-to-reach and difficult-to-serve locations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchPortsmouth, United KingdomHQ recorded Nov 6, 2026201-500197 contacts →

Exact match

“toob is a full-fibre broadband provider on a mission to bring fast, affordable and reliable internet for homes and businesses across England and Scotland.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchCoalisland, United KingdomHQ recorded Nov 6, 2026501-1,000178 contacts →

Exact match

“Viberoptix delivers frontline services to fibre networks providers across the UK and Ireland.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchCarlisle, United KingdomHQ recorded Nov 6, 2026201-500145 contacts →

Exact match

“We’re an independent Full Fibre broadband provider, connecting homes, businesses and new-build developments across the UK.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSnitterfield, United KingdomHQ recorded Nov 6, 2026201-500141 contacts →

Exact match

“CASS (Cabling and Splicing Services) is a services driven telecommunications specialist business.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchBath, United KingdomHQ recorded Nov 6, 202651-200138 contacts →

Exact match

“At Truespeed, we're on a mission to bring ultrafast, full fibre broadband to homes, businesses and communities across the South West.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchBradford, United KingdomHQ recorded Nov 6, 2026201-500137 contacts →

Exact match

“Welcome to Nano Fibre UK!”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchIrlam, United KingdomHQ recorded Nov 6, 202651-200124 contacts →

Exact match

“As a UK fibre network provider, we believe that high-speed broadband should be available for everyone.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchLuton, United KingdomHQ recorded Nov 6, 202651-200123 contacts →

Exact match

“Sparta Telecom was established in Luton Bedfordshire in 2011.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-200110 contacts →

Exact match

“Spitfire Network Services is a UK-based, multi-award winning telecoms and ISP provider for businesses.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 336 fiber optic service providers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 6,605 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Fiber optic service providers based in the United Kingdom at a glance

As of Nov 6, 2026
34.2%Verified-email coverage
57.5Average contacts per company
11-50Median size (employees)
12.8%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
129
11-50
106
51-200
58
201-500
22
501-1,000
7
1,001-5,000
2
10001+
1

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 336 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “fiber optic service providers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking
Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification
Every displayed company carries at least one verified work email. RevenueBase tracks 6,605 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh
This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Fiber optic service providers by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “fiber optic service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many fiber optic service providers are there based in the United Kingdom?

RevenueBase identified 336 company matches for fiber optic service providers associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Virgin Media tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most fiber optic service providers?

London leads with 43 company records, followed by Hull (8) and Bristol (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 6,605 professional contacts with verified work emails tracked across these 336 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 336 fiber optic service providers based in the United Kingdom. Start with a free account, no credit card.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.