Company lists · Data refreshed September 2026

Top 25 Enterprise network contractors based in London, United Kingdom

Name: Enterprise network contractors based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 98 companies tracked

RevenueBase identified 98 enterprise network contractors headquartered in London, United Kingdom as of September 2026 and tracks 3,065 professional contacts across them, including 1,031 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers enterprise network contractors 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 28, 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 28, 2026 86% judged on-target in blind review

98Companies

3,065Contacts tracked

1,031Verified emails

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The 25 largest enterprise network contractors based in London, United Kingdom

Ranked by team size

Top 25 of 98 enterprise network contractors based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise network contractors: 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	J Brand LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	1,245 contacts →
	Indirect evidence “Originally set up in 1933 by Joseph Brand as an electrical contracting and repair business in Margaret Street W1, the company today still operates today with the same guiding…” Source: RevenueBase Database · checked Sep 28, 2026
2	ONNEC	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	585 contacts →
	Indirect evidence “Onnec is a leading partner for IT Infrastructure design, installation and operational support services.” Source: RevenueBase Database · checked Sep 28, 2026
3	Maintel	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	341 contacts →
	Indirect evidence “Maintel is a communications managed services provider.” Source: RevenueBase Database · checked Sep 28, 2026
4	Block Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	141 contacts →
	Indirect evidence “Block was created for one reason: to empower people and inspire change through technology.” Source: RevenueBase Database · checked Sep 28, 2026
5	The Cabling Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	58 contacts →
	Indirect evidence “The Cabling Group provides robust and scalable structured cabling solutions, forming the backbone of modern workplace technology.” Source: RevenueBase Database · checked Sep 28, 2026
6	Electranet UK Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
7	Dacc Europe Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
8	Rellium	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	26 contacts →
	Partial evidence “Rellium provides general contractors, turnkey ICT companies and companies expanding into ICT with IT support focusing on structured cabling and IT infrastructure services.” Source: RevenueBase Database · checked Sep 28, 2026
9	Infrastructure Design Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect 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 28, 2026
10	Neutrality Managed Services	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Indirect evidence “Neutrality are a service provider, delivering managed infrastructure services and hybrid connectivity solutions to our global client base.” Source: RevenueBase Database · checked Sep 28, 2026
11	Project Vision LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “Project Vision is a multi-award-winning technology services provider specialising in comprehensive IT and business-enabling solutions.” Source: RevenueBase Database · checked Sep 28, 2026
12	ART Nett LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	14 contacts →
	Indirect evidence “Art Nett Ltd are layer-1 connectivity specialists working to provide endpoint connectivity via copper, fibre optic and radio technologies.” Source: RevenueBase Database · checked Sep 28, 2026
13	Starfish	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	10 contacts →
	Indirect evidence “Mission: The mission of Starfish is to develop technical expertise and share it openly for the benefit of our community.” Source: RevenueBase Database · checked Sep 28, 2026
14	CSL Integration LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	8 contacts →
	Indirect evidence “Who we are - Established in 2004 CSL Integration is a technology solutions Company providing tailored voice, data and video services that add value and improve the way Companies…” Source: RevenueBase Database · checked Sep 28, 2026
15	Enable Network Services	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “A team of highly trained network specialists dedicated to engineering the best solutions with state of the art technology.” Source: RevenueBase Database · checked Sep 28, 2026
16	Verdani Technology Solutions Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “VTSG represents the collaboration of MacTribe and Network London, both with an exceptional track record with over 30 years of combined experience in IT support and installation…” Source: RevenueBase Database · checked Sep 28, 2026
17	Dacpros	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Data Centre Professionals Ltd (also known as Dacpros) is a leading smart-hand service provider in the UK, renowned for its proactive and innovative approach.” Source: RevenueBase Database · checked Sep 28, 2026
18	Nisatec	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “Nisa Tech provides ICT and network solutions to various enterprise markets.” Source: RevenueBase Database · checked Sep 28, 2026
19	Deltacanon	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “At DeltaCanon our mission is simple; To deliver industry leading Design & Build solutions for high spec ICT projects across the globe.” Source: RevenueBase Database · checked Sep 28, 2026
20	Coreconnect	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Core Connect - Delivering Instant Connectivity Inifi are helping office buildings get instant connectivity.” Source: RevenueBase Database · checked Sep 28, 2026
21	Datacat Network Solutions	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “Datacat install B2B network cabling in commercial premises throughout the Greater London area and the SE.” Source: RevenueBase Database · checked Sep 28, 2026
22	Allsort Networks LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Partial evidence “At Allsort Networks, we are your specialists in network infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
23	Servetronic LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Supplying, Installing and maintaining Servers and Computer systems for clients.” Source: RevenueBase Database · checked Sep 28, 2026
24	Compuserve Services LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence “Compuserve Services Ltd was launched in 2015 to deliver high quality IT products and services utilising the very latest technology.” Source: RevenueBase Database · checked Sep 28, 2026
25	Enterprise Cabling Services LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Enterprise Cabling Services Ltd is an information technology and services company based out of United Kingdom.” Source: RevenueBase Database · checked Sep 28, 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: enterprise network contractors. 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 enterprise network contractors.
Partial evidence: Its own public description names part of enterprise network contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise network contractors. 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 98 enterprise network contractors based in London, United Kingdom

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Enterprise network contractors based in London, United Kingdom at a glance

As of Sep 28, 2026

33.6%Verified-email coverage

31.3Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 98 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 enterprise network contractors, 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 “enterprise network contractors”. 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 enterprise network contractors), 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 enterprise network contractors, 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, 1,031 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 28, 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.

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 enterprise network contractors, 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 enterprise network contractors are there based in London, United Kingdom?

RevenueBase identified 98 enterprise network contractors 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?

J Brand LTD, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most enterprise network contractors?

London leads the United Kingdom with 98 headquartered companies, followed by Birmingham (13) and Bristol (12).

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 1,031 verified decision-maker contacts tracked across these 98 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 28, 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.