Company lists · Data refreshed September 2026
Top 25 Telephone system installers based in the United Kingdom
RevenueBase identified 204 telephone system installers headquartered in the United Kingdom as of September 2026 and tracks 1,132 professional contacts across them, including 306 with verified work emails. London is the largest hub.
This list covers telephone system installers 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 22, 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.
The 25 largest telephone system installers based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 27 contacts → | ||||
Indirect evidence “From a business perspective Nexsis Comms pretty much cover all elements that will make an office run as required.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 26 contacts → | ||||
Partial evidence “At DVAD we’re a full service voice and data supplier providing flexible, world-class business telecoms systems and IT solutions.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 26 contacts → | ||||
Indirect evidence “Ghekko is an independent international company providing professional services within the Telecommunications hardware market, with operating offices in EMEA & North America.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 24 contacts → | ||||
Indirect evidence “We are a leading telecommunications business with offices based in Bridgend, Bristol and Aberystwyth - covering Wales and South West UK.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 22 contacts → | ||||
Partial evidence “With over 30 years of experience in the telecoms industry we specialise in the installation of award-winning phone systems from some of the biggest names like Samsung, Siemens…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 20 contacts → | ||||
Indirect evidence “The Home Of Digital Transformation.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 20 contacts → | ||||
Strong evidence “We are a dedicated team of individuals with over 25 years' worth of experience providing and installing business telephony systems across the UK.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 18 contacts → | ||||
Indirect evidence “Air Telecom is one of the leading providers of business technology and telecoms products and services.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 16 contacts → | ||||
Strong evidence “Bolton based telecommunications service provider, specialising in telephone systems and maintenance, calls and lines, connectivity and mobile solutions.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 16 contacts → | ||||
Indirect evidence “After 20 years as DJM Telecom Ltd, we have grown - moved to a new Head Office in Berkshire, a new Director and three more engineers, as well as merging with Voice on Data, our…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 16 contacts → | ||||
Indirect evidence “Oricom Limited specialise in the design, supply, installation and support of new and existing voice and data networks.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 15 contacts → | ||||
Indirect evidence “Nationwide telecommunication installation services-Civils -TRR/Cabling -Blowing Fibre -Overhead -Splicing and testing -Home installs -E2E Trunk -ERS” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 15 contacts → | ||||
Strong evidence “Aerial Business Communications have been providing business mobiles, telephone systems, IT systems and internet connectivity services to businesses throughout Hampshire and the UK…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 13 contacts → | ||||
Strong evidence “RHM supply and support telephone systems, calls and lines, mobiles and internet access for businesses in the UK.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 10 contacts → | ||||
Partial evidence “At ClearTech Communications, we specialise in providing market-leading hardware, advanced systems, and intuitive software to build a robust and resilient communication…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 10 contacts → | ||||
Strong evidence “At Pioneer Business Systems, we provide a fantastic new business phone system, within your existing telephone expenditure.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 9 contacts → | ||||
Strong evidence “NM Cabling are a leading data cabling installer assisting IT, Technology, Value Added Re-sellers and Telephone Systems Companies in the London, South and surrounding areas with a…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 9 contacts → | ||||
Strong evidence “At Ubi we supply, install and support phone systems, mobiles, telephone lines, fibre, guest Wi-Fi and tracking and management software for businesses, hotels and schools.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 9 contacts → | ||||
Indirect evidence “Countynet Ltd are a Telecommunications & Network installation contractors based in the Midlands.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 9 contacts → | ||||
Indirect evidence “CommsProvider are a specialist product and service provider of business telecommunications equipment.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 8 contacts → | ||||
Strong evidence “We have more than 30 years' experience in helping businesses identify the right telephone system to suit their specific needs.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 8 contacts → | ||||
Indirect evidence “Offering communications solutions to local and national businesses.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 8 contacts → | ||||
Indirect evidence “Adept Communications and Technology is a professional, friendly Communications and IT company based in Newcastle Upon Tyne, North East England.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 8 contacts → | ||||
Indirect evidence “Integral Communications is your trusted partner in delivering cutting-edge business telecoms and network services across the UK.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 8 contacts → | ||||
Indirect evidence “Network Digital Communications (NDC) have been providing telecom solutions to small, medium, and large businesses throughout the UK for over 20 years.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
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: telephone system installers. 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 telephone system installers.
- Partial evidence
- Its own public description names part of telephone system installers, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name telephone system installers. 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 204 telephone system installers based in the United Kingdom
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Telephone system installers based in the United Kingdom at a glance
As of Sep 22, 2026Companies by employee count
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 204 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 telephone system installers, 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 “telephone system installers”. 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 telephone system installers), 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 telephone system installers, 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, 306 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 22, 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 telephone system installers, 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 telephone system installers are there based in the United Kingdom?
RevenueBase identified 204 telephone system installers 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?
Nexsis Comms LTD, headquartered in Derby, tops this list with the largest team on record.
Which city has the most telephone system installers?
London leads with 16 headquartered companies, followed by Birmingham (6) and Bristol (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 306 verified decision-maker contacts tracked across these 204 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 22, 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.
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