Company lists · Data refreshed September 2026

Top 25 Telecommunications data centers based in the United Kingdom

Name: Telecommunications data centers 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 165 companies tracked

RevenueBase identified 165 telecommunications data centers headquartered in the United Kingdom as of September 2026 and tracks 12,899 professional contacts across them, including 5,592 with verified work emails. London is the largest hub.

This list covers telecommunications data centers headquartered in the 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

165Companies

12,899Contacts tracked

5,592Verified emails

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The 25 largest telecommunications data centers based in the United Kingdom

Ranked by team size

Top 25 of 165 telecommunications data centers based in the 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 data centers: 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	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	5,001-10,000	6,233 contacts →
	Indirect 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	NTT Global Data Centers	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,842 contacts →
	Strong evidence “NTT Global Data Centers is a division of NTT DATA.” Source: RevenueBase Database · checked Sep 19, 2026
3	Exponential-E	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	667 contacts →
	Indirect evidence “Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Source: RevenueBase Database · checked Sep 19, 2026
4	Global Switch	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	405 contacts →
	Partial evidence “Global Switch owns and operates sq ft sq m) of exceptional large-scale, multi customer, carrier and cloud neutral data centre space across Europe and Asia-Pacific.” Source: RevenueBase Database · checked Sep 19, 2026
5	Interoute	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	296 contacts →
	Indirect evidence “Interoute is part of EXA Infrastructure, the largest dedicated digital infrastructure platform connecting Europe and North America, and owns kilometres of fibre network across 34…” Source: RevenueBase Database · checked Sep 19, 2026
6	Virtus Data Centres	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	237 contacts →
	Partial evidence “VIRTUS Data Centres (VIRTUS) is a trusted global leader in the data centre industry and the UK’s leading data centre company, committed to delivering reliable, resilient and…” Source: RevenueBase Database · checked Sep 19, 2026
7	Deepscale Technologies LTD	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	141 contacts →
	Strong evidence “Deepscale Technologies provide data center, enterprise & managed IT solutions across the globe that enhance how businesses operate.” Source: RevenueBase Database · checked Sep 19, 2026
8	ORM	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	82 contacts →
	Indirect evidence “ORM is now Paragon DCX.” Source: RevenueBase Database · checked Sep 19, 2026
9	Hyve Managed Hosting	Indirect evidence	Brighton, United KingdomHQ checked Sep 19, 2026	51-200	77 contacts →
	Indirect evidence “We are a fully-managed global hosting provider offering industry-leading technology with a customer-centric approach.” Source: RevenueBase Database · checked Sep 19, 2026
10	Domicilium	Partial evidence	Ballasalla, United KingdomHQ checked Sep 19, 2026	11-50	74 contacts →
	Partial evidence “From state-of-the-art data centres, cloud and network services, to proactive support and consultancy services, our solutions are designed to help you achieve your business goals…” Source: RevenueBase Database · checked Sep 19, 2026
11	Onyx Group	Indirect evidence	Stockton-on-tees, United KingdomHQ checked Sep 19, 2026	51-200	66 contacts →
	Indirect evidence “We would like to share some exciting news – Onyx Group has been acquired by cloud, colocation and managed hosting expert Pulsant, expanding its network to 15 UK-based datacentres.” Source: RevenueBase Database · checked Sep 19, 2026
12	5g Communications	Indirect evidence	High Wycombe, United KingdomHQ checked Sep 19, 2026	51-200	61 contacts →
	Indirect evidence “Hello.” Source: RevenueBase Database · checked Sep 19, 2026
13	IIJ Europe	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	49 contacts →
	Indirect evidence “We were founded on a culture of engineering excellence and innovation, IIJ is The Backbone of IT for our clients.” Source: RevenueBase Database · checked Sep 19, 2026
14	Comtec Enterprises LTD	Indirect evidence	Reigate, United KingdomHQ checked Sep 19, 2026	11-50	36 contacts →
	Indirect evidence “We specialise in providing unified communication, technology and datacentre services to businesses operating within the private and public sectors throughout the UK and across the…” Source: RevenueBase Database · checked Sep 19, 2026
15	B-612 Remote Hands & Eyes Support	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	33 contacts →
	Partial evidence “Trusted Partner of Your Network Infrastructure Managing network infrastructure in Data-Centres on behalf of a wide range of colocation users since 2009, B-612 offers a…” Source: RevenueBase Database · checked Sep 19, 2026
16	Coreix	Indirect evidence	Welwyn Garden City, United KingdomHQ checked Sep 19, 2026	11-50	33 contacts →
	Indirect evidence “Coreix is a managed hosting, colocation and network services provider which offers secure, agile, scalable and robust hosting solutions to clients in varying sectors including…” Source: RevenueBase Database · checked Sep 19, 2026
17	Silver Lining Convergence	Indirect evidence	Fareham, United KingdomHQ checked Sep 19, 2026	11-50	30 contacts →
	Indirect evidence “Silver Lining's unified communications and converged networks offer improved efficiency, reduce running costs and are designed with the flexibility to easily upgrade as your…” Source: RevenueBase Database · checked Sep 19, 2026
18	Infiniti IT Limited	Partial evidence	Witney, United KingdomHQ checked Sep 19, 2026	1-10	29 contacts →
	Partial evidence “INFINITI is a one-stop data centre services provider with an eye for detail and outstanding customer service.” Source: RevenueBase Database · checked Sep 19, 2026
19	Eloquent Technologies Limited	Partial evidence	Stratford Upon Avon, United KingdomHQ checked Sep 19, 2026	11-50	28 contacts →
	Partial evidence “Eloquent operates a range of platforms across various secure data centres in the UK, all of which are connected to our network and serve as the delivery point for our services.” Source: RevenueBase Database · checked Sep 19, 2026
20	Atlas Communications NI LTD	Indirect evidence	Belfast, United KingdomHQ checked Sep 19, 2026	11-50	28 contacts →
	Indirect evidence “At Atlas we’re in the business of communication, focusing on powering relationships by supplying technology that keeps you and your customers connected.” Source: RevenueBase Database · checked Sep 19, 2026
21	Olive Communications UK	Indirect evidence	High Wycombe, United KingdomHQ checked Sep 19, 2026	51-200	28 contacts →
	Indirect evidence “Now part of the Onecom Group, Olive and Onecom create the largest business-to-business mobile, fixed-line and cloud specialist in the UK.” Source: RevenueBase Database · checked Sep 19, 2026
22	Core Telecom LTD	Indirect evidence	Leeds, United KingdomHQ checked Sep 19, 2026	11-50	27 contacts →
	Indirect evidence “Core Telecom is trusted worldwide for delivering reliable, stable and future-proof connections.” Source: RevenueBase Database · checked Sep 19, 2026
23	NGC Networks Limited NOW Cloudclevr	Partial evidence	Wakefield, United KingdomHQ checked Sep 19, 2026	11-50	24 contacts →
	Partial evidence “NGC Networks is a business communications company specialising in telecommunications and internet connectivity solutions.” Source: RevenueBase Database · checked Sep 19, 2026
24	Workspace Technology LTD	Indirect evidence	Sutton Coldfield, United KingdomHQ checked Sep 19, 2026	11-50	23 contacts →
	Indirect evidence “Workspace Technology Ltd provide expertly engineered Mission Critical Infrastructure, Rack Colocation Hosting and Maintenance & Support Services.” Source: RevenueBase Database · checked Sep 19, 2026
25	FEL Group LTD	Indirect evidence	Scunthorpe, United KingdomHQ checked Sep 19, 2026	11-50	21 contacts →
	Indirect evidence “Protecting the Heartbeat of British Business'' We create, maintain and manage controlled live environments vital for the operation of thousands of servers at the heart of the UK…” 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 data centers. 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 data centers.
Partial evidence: Its own public description names part of telecommunications data centers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecommunications data centers. 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 165 telecommunications data centers based in the United Kingdom

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Telecommunications data centers based in the United Kingdom at a glance

As of Sep 19, 2026

43.4%Verified-email coverage

78.2Average contacts per company

11-50Median size (employees)

29.7%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

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 165 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 data centers, 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 the United Kingdom whose own description of what they do matches “telecommunications data centers”. 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 data centers), 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 data centers, and records with no verified work email. Companies headquartered outside United Kingdom 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, 5,592 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 data centers by metro

Telecommunications data centers in London49

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 data centers, 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 data centers are there based in the United Kingdom?

RevenueBase identified 165 telecommunications data centers headquartered in the 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 data centers?

London leads with 49 headquartered companies, followed by Leeds (5) and Reading (4).

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 5,592 verified decision-maker contacts tracked across these 165 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.