Company lists · Data refreshed September 2026

Top 25 Telecommunications providers based in the United Kingdom

Name: Telecommunications providers based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 1,544 companies tracked

RevenueBase identified 1,544 telecommunications providers headquartered in the United Kingdom as of September 2026 and tracks 40,893 professional contacts across them, including 11,756 with verified work emails. London is the largest hub.

This list covers telecommunications providers headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review

1,544Companies

40,893Contacts tracked

11,756Verified emails

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The 25 largest telecommunications providers based in the United Kingdom

Ranked by team size

Top 25 of 1,544 telecommunications providers based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to telecommunications providers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Virgin Media	Indirect evidence	Reading, United KingdomHQ checked Sep 19, 2026	10001+	6,839 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
2	Vodafone Business	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	10001+	6,767 contacts →
	Indirect evidence “Vodafone Business is part of the Vodafone Group.” Source: RevenueBase Database · checked Sep 19, 2026
3	GAMMA	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,568 contacts →
	Indirect evidence “Gamma Communications is a leading provider of technology-based communication solutions across Europe.” Source: RevenueBase Database · checked Sep 19, 2026
4	Kelly Group	Indirect evidence	Wembley, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Source: RevenueBase Database · checked Sep 19, 2026
5	Exponential-E	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	667 contacts →
	Indirect evidence “Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Source: RevenueBase Database · checked Sep 19, 2026
6	Onecom	Indirect evidence	Fareham, United KingdomHQ checked Sep 19, 2026	501-1,000	655 contacts →
	Indirect evidence “Onecom is the UK’s leading business telecoms and cloud communications provider managing over a million services for business customers - delivering communication services and…” Source: RevenueBase Database · checked Sep 19, 2026
7	PXC	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	1,001-5,000	597 contacts →
	Indirect evidence “PXC is the UK’s leading wholesale provider of innovative solutions for connectivity, voice, cloud and security, underpinned by the UK’s most robust, secure, resilient and reliable…” Source: RevenueBase Database · checked Sep 19, 2026
8	ZEN Internet	Strong evidence	Rochdale, United KingdomHQ checked Sep 19, 2026	501-1,000	521 contacts →
	Strong evidence “Zen is a B Corp certified telecommunications and technology service provider in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
9	Monty Mobile	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	514 contacts →
	Indirect evidence “For nearly three decades, Monty Mobile has been at the forefront of global telecom innovation, partnering with mobile operators, enterprises, hyperscalers, and financial…” Source: RevenueBase Database · checked Sep 19, 2026
10	DBS Group	Indirect evidence	Grimsby, United KingdomHQ checked Sep 19, 2026	n/a	467 contacts →
	Indirect evidence “At DBS we provide IT and telecomms support to businesses nationwide, helping them to stay connected.” Source: RevenueBase Database · checked Sep 19, 2026
11	Comex 2000	Strong evidence	Derby, United KingdomHQ checked Sep 19, 2026	501-1,000	367 contacts →
	Strong evidence “Comex is an established major strategic partner of choice within the telecommunication sector, across the United Kingdom and Ireland, offering an end to end solution.” Source: RevenueBase Database · checked Sep 19, 2026
12	Clarke Telecom	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	201-500	312 contacts →
	Indirect evidence “Clarke Telecom carries out every aspect of wireless telecoms network infrastructure delivery.” Source: RevenueBase Database · checked Sep 19, 2026
13	Interoute	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	296 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
14	Magdalene	Strong evidence	St Ives, United KingdomHQ checked Sep 19, 2026	201-500	273 contacts →
	Strong evidence “Magdalene provides comprehensive independent solutions which address the individual needs of our customers throughout the Telecommunications Industry.” Source: RevenueBase Database · checked Sep 19, 2026
15	Zzoomm	Indirect evidence	Oxford, United KingdomHQ checked Sep 19, 2026	201-500	250 contacts →
	Indirect evidence “Zzoomm is here to build a Full Fibre broadband network in your town; fit for the future, for everyone, right now.” Source: RevenueBase Database · checked Sep 19, 2026
16	GCI	Indirect evidence	Lincoln, United KingdomHQ checked Sep 19, 2026	501-1,000	203 contacts →
	Indirect evidence “Multi-award-winning GCI is one of the UK’s leading ICT Service Providers, with offices across the UK.” Source: RevenueBase Database · checked Sep 19, 2026
17	Glide UK	Indirect evidence	Kenn, United KingdomHQ checked Sep 19, 2026	201-500	191 contacts →
	Indirect evidence “Welcome to Glide, the UK's leading business broadband provider specialising in hard-to-reach and difficult-to-serve locations.” Source: RevenueBase Database · checked Sep 19, 2026
18	Nimans	Strong evidence	Manchester, United KingdomHQ checked Sep 19, 2026	201-500	181 contacts →
	Strong evidence “Nimans is the largest Telecommunications distributor in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
19	CROFT	Indirect evidence	Hertford, United KingdomHQ checked Sep 19, 2026	51-200	171 contacts →
	Indirect evidence “Keeping your team connected with bespoke managed service solutions.” Source: RevenueBase Database · checked Sep 19, 2026
20	Beacon Comms	Indirect evidence	Tavistock, United KingdomHQ checked Sep 19, 2026	201-500	151 contacts →
	Indirect evidence “Beacon Comms is the trading name of Beacon Communication Services Ltd.” Source: RevenueBase Database · checked Sep 19, 2026
21	Cass Worldwide	Strong evidence	Snitterfield, United KingdomHQ checked Sep 19, 2026	201-500	134 contacts →
	Strong evidence “CASS (Cabling and Splicing Services) is a services driven telecommunications specialist business.” Source: RevenueBase Database · checked Sep 19, 2026
22	SCG Together	Indirect evidence	Hemel Hempstead, United KingdomHQ checked Sep 19, 2026	501-1,000	125 contacts →
	Indirect evidence “Established in 1965, SCG is a supplier of business-to-business communications products and services.” Source: RevenueBase Database · checked Sep 19, 2026
23	Commsworld	Strong evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	51-200	122 contacts →
	Strong evidence “Founded in 1994, Commsworld is a leading UK Telecommunications Network Provider and ISP and supports thousands of the UK’s leading organisations, both in public and private…” Source: RevenueBase Database · checked Sep 19, 2026
24	Radius Connect Solutions	Indirect evidence	Crewe, United KingdomHQ checked Sep 19, 2026	201-500	122 contacts →
	Indirect evidence “Radius Connect Solutions is an award-winning independent “total communications” solution provider.” Source: RevenueBase Database · checked Sep 19, 2026
25	Sparta Telecom LTD	Indirect evidence	Luton, United KingdomHQ checked Sep 19, 2026	51-200	115 contacts →
	Indirect evidence “Sparta Telecom was established in Luton Bedfordshire in 2011.” Source: RevenueBase Database · checked Sep 19, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: telecommunications providers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names telecommunications providers.
Partial evidence: Its own public description names part of telecommunications providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunications providers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,544 telecommunications providers based in the United Kingdom

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Telecommunications providers based in the United Kingdom at a glance

As of Sep 19, 2026

28.7%Verified-email coverage

26.5Average contacts per company

1-10Median size (employees)

15.2%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

766

11-50

579

51-200

121

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,544 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among telecommunications providers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “telecommunications providers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names telecommunications providers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among telecommunications providers, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 11,756 across the full list. 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 September 19, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Telecommunications providers by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names telecommunications providers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many telecommunications providers are there based in the United Kingdom?

RevenueBase identified 1,544 telecommunications providers headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Virgin Media, headquartered in Reading, tops this list with the largest team on record.

Which city has the most telecommunications providers?

London leads with 234 headquartered companies, followed by Manchester (41) and Birmingham (31).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 11,756 verified decision-maker contacts tracked across these 1,544 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 19, 2026.

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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 Smart Search, 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.