Company lists · Data refreshed September 2026

Top 25 Communication service providers based in the United Kingdom

Name: Communication 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 602 companies tracked

RevenueBase identified 602 company matches for communication service providers associated with the United Kingdom as of September 2026 and tracks 129,863 professional contacts across them, including 34,972 with verified work emails. London is the largest hub.

This list covers company matches for communication 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

602Companies

129,863Contacts tracked

34,972Verified emails

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The 25 largest communication service providers based in the United Kingdom

Ranked by team size

Top 25 of 602 company matches for communication 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	Vodafone	Exact match	London, United KingdomHQ recorded Sep 19, 2026	10001+	84,459 contacts →
	Exact match “At Vodafone, our purpose is to connect everyone.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	SKY	Exact match	Middlesex, United KingdomHQ recorded Sep 19, 2026	10001+	26,533 contacts →
	Exact match “Sky connects and entertains millions of people across Europe.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Lebara	Exact match	London, United KingdomHQ recorded Sep 19, 2026	501-1,000	776 contacts →
	Exact match “Lebara believes everyone should have the opportunity to access a reliable network with simple and dependable service at an affordable price.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Onecom	Exact match	Fareham, United KingdomHQ recorded Sep 19, 2026	501-1,000	655 contacts →
	Exact match “Onecom is the UK’s leading business telecoms and cloud communications provider managing over a million services for business customers - delivering communication services and…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	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
6	BT Local Business	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	157 contacts →
	Exact match “At BT Local Business London West & South we are part of BT's Business division.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Radius Connect Solutions	Exact match	Crewe, United KingdomHQ recorded Sep 19, 2026	201-500	122 contacts →
	Exact match “Radius Connect Solutions is an award-winning independent “total communications” solution provider.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Sparta Telecom LTD	Exact match	Luton, United KingdomHQ recorded Sep 19, 2026	51-200	115 contacts →
	Exact match “Sparta Telecom was established in Luton Bedfordshire in 2011.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Tela Technology	Exact match	Hampton-in-arden, United KingdomHQ recorded Sep 19, 2026	51-200	111 contacts →
	Exact match “We provide communication solutions and IT business services to businesses, big and small, to help your business grow.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	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
11	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
12	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
13	Rydal Group	Exact match	Peterborough, United KingdomHQ recorded Sep 19, 2026	51-200	74 contacts →
	Exact match “Rydal Group is the brand name of Rydal Communications LTD, Rydal Security LTD & Rydal Energy LTD.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	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
15	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
16	Enconvo UK	Exact match	Telford, United KingdomHQ recorded Sep 19, 2026	51-200	61 contacts →
	Exact match “We’re a leading unified communications provider supplying over 2 million users with the technology they need to work their magic.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Abzorb	Exact match	Brighouse, United KingdomHQ recorded Sep 19, 2026	51-200	60 contacts →
	Exact match “Business: It’s all about connecting people.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	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
19	Cellular Solutions	Exact match	Sunderland, United KingdomHQ recorded Sep 19, 2026	n/a	56 contacts →
	Exact match “Established in 1995, Cellular Solutions NE, now part of Communications Plus, is a trusted business telecoms provider supporting organisations across the North East and throughout…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Manor Telecom	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	55 contacts →
	Exact match “Manor IT (UK) Limited is an esteemed industry leader, specializing in global wholesale and retail Voice & SMS termination and Communications Platform as a Service (CPaaS).” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	The ONE Point	Exact match	Hull, United KingdomHQ recorded Sep 19, 2026	51-200	53 contacts →
	Exact match “The "whole" in one solution for your business telecommunications, mobile phones, broadband, I.T.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	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
23	Citycom	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	46 contacts →
	Exact match “Citycom is one of the UK’s leading providers of business telecoms solutions, offering mobile, fixed and cloud services.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Prestige Telecom Group	Exact match	Gosport, United KingdomHQ recorded Sep 19, 2026	51-200	44 contacts →
	Exact match “We help UK companies cut costs, stay connected, and scale smarter - with VoIP, mobile and broadband solutions that actually work.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	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

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 “communication 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 602 communication service providers based in the United Kingdom

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Communication service providers based in the United Kingdom at a glance

As of Sep 19, 2026

26.9%Verified-email coverage

215.7Average contacts per company

1-10Median size (employees)

15.1%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

306

11-50

223

51-200

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 602 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 “communication 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 34,972 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 “communication service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 602 company matches for communication 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?

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

Which city has the most communication service providers?

London leads with 91 company records, followed by Leeds (11) and Bristol (10).

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 34,972 professional contacts with verified work emails tracked across these 602 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.