Company lists · Data refreshed September 2026

Top 22 Telecommunications infrastructure providers based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 137 companies tracked

RevenueBase identified 137 telecommunications infrastructure providers headquartered in London, United Kingdom as of September 2026 and tracks 10,902 professional contacts across them, including 4,758 with verified work emails. London is the largest hub.

This list covers telecommunications infrastructure providers headquartered in London, 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

137Companies

10,902Contacts tracked

4,758Verified emails

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The 22 largest telecommunications infrastructure providers based in London, United Kingdom

Ranked by team size

Top 22 of 137 telecommunications infrastructure providers based in London, 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 infrastructure 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	Colt Technology Services	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	5,001-10,000	6,233 contacts →
	Partial evidence “Colt Technology Services (Colt) is a global digital infrastructure company which creates extraordinary connections to help businesses succeed.” Source: RevenueBase Database · checked Sep 19, 2026
2	Helios Towers	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	784 contacts →
	Indirect evidence “Helios Towers is a leading independent telecom tower company connecting people and powering growth across Africa and the Middle East.” Source: RevenueBase Database · checked Sep 19, 2026
3	EXA Infrastructure	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	416 contacts →
	Partial evidence “EXA Infrastructure is an award-winning portfolio company of I Squared Capital and one of the largest dedicated digital infrastructure platforms throughout Europe, connecting North…” Source: RevenueBase Database · checked Sep 19, 2026
4	Eunetworks	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	362 contacts →
	Partial evidence “euNetworks (@euNetworks) is a European provider of bandwidth infrastructure services.” Source: RevenueBase Database · checked Sep 19, 2026
5	RETN	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	179 contacts →
	Indirect evidence “RETN is one of the fastest-growing independent Eurasian network services providers, awarded the title of Innovation Disruptor of the Year, at the prestigious Global Connectivity…” Source: RevenueBase Database · checked Sep 19, 2026
6	Spitfire Network Services LTD	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	99 contacts →
	Indirect evidence “Spitfire Network Services is a UK-based, multi-award winning telecoms and ISP provider for businesses.” Source: RevenueBase Database · checked Sep 19, 2026
7	Radiocoms Systems LTD	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	57 contacts →
	Indirect evidence “Radiocoms Systems Limited is a mature communications company of some 50 years and is now the UK’s leading independent communications supplier specialising in the design…” Source: RevenueBase Database · checked Sep 19, 2026
8	Electranet UK Limited	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	49 contacts →
	Indirect evidence “Electranet’s mission is to be a preferred partner to the public and private sectors, bringing competitively priced, secure and innovative solutions to the market.” Source: RevenueBase Database · checked Sep 19, 2026
9	F&w Networks	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	35 contacts →
	Indirect evidence “F&W Networks aims at deploying Fibre to the Premises (FTTP) and FWA systems in multiple locations across the UK to complement existing FTTP rollouts with the ultimate objective of…” Source: RevenueBase Database · checked Sep 19, 2026
10	Zamir Telecom LTD	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	35 contacts →
	Partial evidence “Zamir Telecom Limited (ZTL) is a global leader in providing solutions for Internet and Telecommunication sectors.” Source: RevenueBase Database · checked Sep 19, 2026
11	Dacc Europe Limited	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	31 contacts →
	Partial evidence “DACC Europe is a leading structured cable and network infrastructure provider established in 1996 in Docklands London, enjoying year on year growth and fully manufacturer…” Source: RevenueBase Database · checked Sep 19, 2026
12	Brdy. Wireless Broadband	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	28 contacts →
	Indirect evidence “Brdy Wireless Broadband – Connecting you to the world At Brdy, our vision is delivering fast broadband connectivity to everyone, anywhere.” Source: RevenueBase Database · checked Sep 19, 2026
13	Infrastructure Design Solutions	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	24 contacts →
	Partial evidence “IDS is a global ICT and security infrastructure design consultancy, specialized in structured cabling design and physical security engineering solutions that meet the highest…” Source: RevenueBase Database · checked Sep 19, 2026
14	Mills LTD	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	23 contacts →
	Strong evidence “Mills is the largest independently owned family run business in the telecommunications sector and provides the full range of fibre infrastructure products, tools and equipment…” Source: RevenueBase Database · checked Sep 19, 2026
15	Carritech Limited	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “Carritech is a telecommunications company which was founded in 2010 by a management team with over 30 years of experience in the carrier industry.” Source: RevenueBase Database · checked Sep 19, 2026
16	Prestige Optical LTD	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	16 contacts →
	Partial evidence “Prestige Optical Ltd is a nation-wide leading provider of high-quality connectivity solutions, specialising in advanced infrastructure and Wifi connectivity.” Source: RevenueBase Database · checked Sep 19, 2026
17	A3&o Limited	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	14 contacts →
	Partial evidence “A3 & O, the leading telecommunication System Integrator and Solution Provider; The company provides state of the art technologies and turnkey solutions to its clients across the…” Source: RevenueBase Database · checked Sep 19, 2026
18	Nexus IP	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “Nexus IP have been providing business telephony nationwide for over 30 years.” Source: RevenueBase Database · checked Sep 19, 2026
19	Linx-Networks	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	9 contacts →
	Partial evidence “Linx-Networks: Driving Innovation in Trading & Telecom Solutions Linx-Networks is a leading technology and telecommunications provider headquartered in the City of London…” Source: RevenueBase Database · checked Sep 19, 2026
20	Kbtl Telecoms	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	8 contacts →
	Partial evidence “Established in 2006, KBTL specialises in Telecommunications Systems Delivery across the Rail, Power and General Transportation sectors.” Source: RevenueBase Database · checked Sep 19, 2026
21	Smart Connect Telecom	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	8 contacts →
	Indirect evidence “Smart Connect Telecom is one of the UK’s leading providers in voice and data communications.” Source: RevenueBase Database · checked Sep 19, 2026
22	Bespoke Telecoms & Cctv	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “Since 2010, Bespoke Telecoms have been providing some of the of the finest business and residential properties in the Country with the fastest possible internet services…” 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 infrastructure 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 infrastructure providers.
Partial evidence: Its own public description names part of telecommunications infrastructure providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunications infrastructure 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 22 of 137 telecommunications infrastructure providers based in London, United Kingdom

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Telecommunications infrastructure providers based in London, United Kingdom at a glance

As of Sep 19, 2026

43.6%Verified-email coverage

79.6Average contacts per company

11-50Median size (employees)

100.0%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 137 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 infrastructure 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 London, United Kingdom whose own description of what they do matches “telecommunications infrastructure 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 infrastructure 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 infrastructure providers, and records with no verified work email. Companies headquartered outside London 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, 4,758 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 infrastructure providers by metro in the United Kingdom

Telecommunications infrastructure providers in London137
Telecommunications infrastructure providers in Manchester28
Telecommunications infrastructure providers in Birmingham27

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 infrastructure 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 infrastructure providers are there based in London, United Kingdom?

RevenueBase identified 137 telecommunications infrastructure providers headquartered in London, 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?

Colt Technology Services, headquartered in London, tops this list with the largest team on record.

Which city has the most telecommunications infrastructure providers?

London leads with 137 headquartered companies, followed by Manchester (28) and Birmingham (27).

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 4,758 verified decision-maker contacts tracked across these 137 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.