Company lists · Data refreshed September 2026

Top 25 B2B telecom agencies based in the United Kingdom

RevenueBase identified 1,784 company matches for B2B telecom agencies associated with the United Kingdom as of September 2026 and tracks 33,054 professional contacts across them, including 10,976 with verified work emails. London is the largest hub.

This list covers company matches for B2B telecom agencies 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 21, 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 21, 2026 How this list was built
1,784Companies
33,054Contacts tracked
10,976Verified emails
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The 25 largest B2B telecom agencies based in the United Kingdom

Ranked by team size
Top 25 of 1,784 company matches for B2B telecom agencies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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 matchLondon, United KingdomHQ recorded Sep 21, 202610001+6,767 contacts →

Exact match

“Vodafone Business is part of the Vodafone Group.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 21, 20261,001-5,0001,568 contacts →

Exact match

“Gamma Communications is a leading provider of technology-based communication solutions across Europe.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchShoreham By Sea, United KingdomHQ recorded Sep 21, 20261,001-5,000960 contacts →

Exact match

“Welcome to Focus Group.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 21, 2026501-1,000667 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 21, 2026 · View company records in RevenueBase
5Exact matchFareham, United KingdomHQ recorded Sep 21, 2026501-1,000655 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 21, 2026 · View company records in RevenueBase
6Exact matchManchester, United KingdomHQ recorded Sep 21, 20261,001-5,000597 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchRochdale, United KingdomHQ recorded Sep 21, 2026501-1,000521 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchGrimsby, United KingdomHQ recorded Sep 21, 2026n/a467 contacts →

Exact match

“At DBS we provide IT and telecomms support to businesses nationwide, helping them to stay connected.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 21, 2026201-500341 contacts →

Exact match

“Maintel is a communications managed services provider.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchGateshead, United KingdomHQ recorded Sep 21, 2026201-500266 contacts →

Exact match

“Welcome to Aspire Technology Solutions!”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchAberdeen, United KingdomHQ recorded Sep 21, 2026n/a214 contacts →

Exact match

“IFB - Managed IT Services Provider committed to maximising and supporting our customers' uptime.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchPortsmouth, United KingdomHQ recorded Sep 21, 2026201-500209 contacts →

Exact match

“Aerial Direct are an award-winning, UK-based, managed communications expert.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchHertford, United KingdomHQ recorded Sep 21, 202651-200171 contacts →

Exact match

“Keeping your team connected with bespoke managed service solutions.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-200157 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 21, 2026 · View company records in RevenueBase
15Exact matchChorley, United KingdomHQ recorded Sep 21, 202651-200148 contacts →

Exact match

“Great technology matters, but it’s great people who make it work.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-200139 contacts →

Exact match

“Publicis Pro is the specialist B2B marketing agency within Publicis Groupe, the world's number one marketing holding group.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchFrome, United KingdomHQ recorded Sep 21, 202651-200138 contacts →

Exact match

“The B2B marketing agency built for complex tech sales.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchCrewe, United KingdomHQ recorded Sep 21, 2026201-500122 contacts →

Exact match

“Radius Connect Solutions is an award-winning independent “total communications” solution provider.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchBirmingham, United KingdomHQ recorded Sep 21, 202651-200119 contacts →

Exact match

“GCL, with its unique, non-scripted approach to telemarketing and related marketing services, has for over 30 years established an enviable reputation for providing winning lead…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchMurray Road, United KingdomHQ recorded Sep 21, 202651-200113 contacts →

Exact match

“FLR Spectron is an award-winning, integrated solutions provider with over two decades of experience in the Telecoms, Mobile, Interiors, Technology, Cooling and Fire and Security…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchHampton-in-arden, United KingdomHQ recorded Sep 21, 202651-200111 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 21, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20099 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 21, 2026 · View company records in RevenueBase
23Exact matchSouthampton, United KingdomHQ recorded Sep 21, 202651-20097 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 21, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20095 contacts →

Exact match

“Fox Agency is an integrated agency for global B2B tech brands on a mission: To grow, expand, transform, accelerate, go-to-market, get investment.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchGlasgow, United KingdomHQ recorded Sep 21, 202651-20094 contacts →

Exact match

“Yellowcom is a leading B2B telecoms provider based in Glasgow, Belfast and Dublin, delivering smart, cost-effective communication solutions across the UK and Ireland for over 17…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 1,784 B2B telecom agencies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 10,976 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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B2B telecom agencies based in the United Kingdom at a glance

As of Sep 21, 2026
33.2%Verified-email coverage
18.5Average contacts per company
11-50Median size (employees)
16.3%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
874
11-50
714
51-200
135
201-500
21
501-1,000
14
1,001-5,000
11
5,001-10,000
3
10001+
2

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 1,784 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 “B2B telecom agencies” 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 10,976 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 21, 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 “B2B telecom agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many B2B telecom agencies are there based in the United Kingdom?

RevenueBase identified 1,784 company matches for B2B telecom agencies 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 Business tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most B2B telecom agencies?

London leads with 290 company records, followed by Manchester (50) and Birmingham (40).

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 10,976 professional contacts with verified work emails tracked across these 1,784 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 21, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,784 B2B telecom agencies 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.