Company lists · Data refreshed September 2026

Top 25 Communications service providers based in the United Kingdom

Name: Communications service 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 467 companies tracked

RevenueBase identified 467 company matches for communications service providers associated with the United Kingdom as of September 2026 and tracks 9,236 professional contacts across them, including 2,203 with verified work emails. London is the largest hub.

This list covers company matches for communications 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 September 19, 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 Sep 19, 2026 How this list was built

467Companies

9,236Contacts tracked

2,203Verified emails

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The 25 largest communications service providers based in the United Kingdom

Ranked by team size

Top 25 of 467 company matches for communications service providers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Exponential-E	Exact match	London, United KingdomHQ recorded Sep 19, 2026	501-1,000	667 contacts →
	Exact match “Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	ZEN Internet	Exact match	Rochdale, United KingdomHQ recorded Sep 19, 2026	501-1,000	521 contacts →
	Exact match “Zen is a B Corp certified telecommunications and technology service provider in the UK.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Commsworld	Exact match	Edinburgh, United KingdomHQ recorded Sep 19, 2026	51-200	122 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Spitfire Network Services LTD	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	99 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 · Sep 19, 2026 · View company records in RevenueBase
5	YO Telecom	Exact match	Southampton, United KingdomHQ recorded Sep 19, 2026	51-200	97 contacts →
	Exact match “Yo Telecom is an award winning telecommunications provider that specialises in small to medium sized businesses.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	ICS Communications	Exact match	Camberley, United KingdomHQ recorded Sep 19, 2026	11-50	75 contacts →
	Exact match “Contact an expert now: 0800 9 77 88 99 Specialists in providing businesses with telecoms, data and energy since 1989.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Welcomm Communications	Exact match	Market Harborough, United KingdomHQ recorded Sep 19, 2026	51-200	69 contacts →
	Exact match “With 30+ years of experience in industry, Welcomm transform the way businesses communicate and operate.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	5g Communications	Exact match	High Wycombe, United KingdomHQ recorded Sep 19, 2026	51-200	61 contacts →
	Exact match “Hello.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Kcom Wholesale	Exact match	Hull, United KingdomHQ recorded Sep 19, 2026	501-1,000	61 contacts →
	Exact match “KCOM has been a driver of innovation in the telecoms industry for more than a century; pushing the boundaries and pioneering new technology from our earliest days as a local phone…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	V4one	Exact match	Coventry, United KingdomHQ recorded Sep 19, 2026	51-200	60 contacts →
	Exact match “V4One proudly carries a die-hard belief in promoting service excellence.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	Windsor Telecom	Exact match	Camberley, United KingdomHQ recorded Sep 19, 2026	51-200	57 contacts →
	Exact match “Windsor Telecom believes that technology should be easy and enjoyable.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	B3 Communications	Exact match	Manchester, United KingdomHQ recorded Sep 19, 2026	11-50	48 contacts →
	Exact match “Customer-focused telecommunications company dedicated to building trust through transparent communication, reliable services, and unwavering commitment.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Spectrum Telecoms	Exact match	First Avenue, United KingdomHQ recorded Sep 19, 2026	11-50	38 contacts →
	Exact match “Spectrum helps UK organisations stay connected with reliable business mobile, connectivity, cloud communications and customer experience solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Zamir Telecom LTD	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	35 contacts →
	Exact match “Zamir Telecom Limited (ZTL) is a global leader in providing solutions for Internet and Telecommunication sectors.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Your Comms Group	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	33 contacts →
	Exact match “Your Comms Group: Connecting Beyond Words.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Avertec	Exact match	London, United KingdomHQ recorded Sep 19, 2026	201-500	33 contacts →
	Exact match “Proudly established in 2007, Avertec provides reliable technology solutions to help businesses stay connected, specialising in business telecoms, business mobile, landlines and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Global Telecom Networks	Exact match	Milton Keynes, United KingdomHQ recorded Sep 19, 2026	11-50	30 contacts →
	Exact match “Global Telecom Networks (GTN): The UK’s Best B2B Dealer (Mobile News Awards 2026) GTN is a Global Managed Service Provider (MSP) dedicated to eliminating the complexity of global…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Atlas Communications NI LTD	Exact match	Belfast, United KingdomHQ recorded Sep 19, 2026	11-50	28 contacts →
	Exact match “At Atlas we’re in the business of communication, focusing on powering relationships by supplying technology that keeps you and your customers connected.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Matrix247	Exact match	Manchester, United KingdomHQ recorded Sep 19, 2026	1,001-5,000	27 contacts →
	Exact match “Matrix247 is becoming Focus Group.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Core Telecom LTD	Exact match	Leeds, United KingdomHQ recorded Sep 19, 2026	11-50	27 contacts →
	Exact match “Core Telecom is trusted worldwide for delivering reliable, stable and future-proof connections.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Direct Voice & Data	Exact match	Huddersfield, United KingdomHQ recorded Sep 19, 2026	11-50	26 contacts →
	Exact match “At DVAD we’re a full service voice and data supplier providing flexible, world-class business telecoms systems and IT solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Pastel	Exact match	Newcastle-under-lyme, United KingdomHQ recorded Sep 19, 2026	11-50	25 contacts →
	Exact match “Businesses know what they don't want - dropped calls and poor call quality, shaky internet connections, hard-to-reach support, and fragmented or clunky systems.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Mainstream Digital	Exact match	Cirencester, United KingdomHQ recorded Sep 19, 2026	11-50	24 contacts →
	Exact match “Mainstream Digital – Communications Solutions for Business Mainstream Digital is a Business Communications solutions provider with over 20 years of telecommunications experience.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	NGC Networks Limited NOW Cloudclevr	Exact match	Wakefield, United KingdomHQ recorded Sep 19, 2026	11-50	24 contacts →
	Exact match “NGC Networks is a business communications company specialising in telecommunications and internet connectivity solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	SCG Wales	Exact match	Bridgend, United KingdomHQ recorded Sep 19, 2026	11-50	24 contacts →
	Exact match “We are a leading telecommunications business with offices based in Bridgend, Bristol and Aberystwyth - covering Wales and South West UK.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “communications service providers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 467 communications service providers based in the United Kingdom

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Communications service providers based in the United Kingdom at a glance

As of Sep 19, 2026

23.9%Verified-email coverage

19.8Average contacts per company

1-10Median size (employees)

14.1%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

245

11-50

176

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 467 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 “communications 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 2,203 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 September 19, 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.

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 “communications service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 467 company matches for communications service providers associated with the United Kingdom as of September 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?

Exponential-E tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most communications service providers?

London leads with 66 company records, followed by Manchester (9) and Leeds (7).

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 2,203 professional contacts with verified work emails tracked across these 467 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 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 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.