Company lists · Data refreshed October 2026
Top 25 Business telecommunications providers based in London, United Kingdom
RevenueBase identified 225 company matches for business telecommunications providers associated with London, United Kingdom as of October 2026 and tracks 18,849 professional contacts across them, including 6,833 with verified work emails. Across the United Kingdom, London is the largest hub for this category.
This list covers company matches for business telecommunications providers associated with London, 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 October 9, 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.
The 25 largest business telecommunications providers based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 6,457 contacts → | ||||
Exact match “Colt Technology Services (Colt) is a global digital infrastructure company which creates extraordinary connections to help businesses succeed.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 2 | 6,350 contacts → | ||||
Exact match “Vodafone Business is part of the Vodafone Group.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 3 | 1,624 contacts → | ||||
Exact match “Gamma Communications is a leading provider of technology-based communication solutions across Europe.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 4 | 678 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 · Oct 9, 2026 · View company records in RevenueBase | |||||
| 5 | 363 contacts → | ||||
Exact match “Maintel is a communications managed services provider.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 6 | 161 contacts → | ||||
Exact match “bOnline is UK’s leading provider of VoIP services for micro and small businesses.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 7 | 106 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 · Oct 9, 2026 · View company records in RevenueBase | |||||
| 8 | 80 contacts → | ||||
Exact match “Sipcom exists to make you the hero of your business narrative by turning complexity into clarity.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 9 | 70 contacts → | ||||
Exact match “Telappliant is an award-winning VoIP and cloud communications provider.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 10 | 62 contacts → | ||||
Exact match “Aura helps global enterprises streamline communications, customer experience and AI.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 11 | 50 contacts → | ||||
Exact match “Citycom is one of the UK’s leading providers of business telecoms solutions, offering mobile, fixed and cloud services.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 12 | 49 contacts → | ||||
Exact match “Fidelity Group is a leading UK software, telecommunications, and energy provider.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 13 | 47 contacts → | ||||
Exact match “Voiceflex is an innovative and multi-award-winning wholesale communications provider and leading telecoms carrier of SIP, Hosted Telephony, Connectivity, Unified Communications…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 14 | 45 contacts → | ||||
Exact match “Microtalk: Wholesale SMS & Carrier-Grade Connectivity Simplified For over 15 years, Microtalk has empowered businesses globally with reliable voice, messaging, and cloud…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 15 | 41 contacts → | ||||
Exact match “Join us on the journey to redefine business communication.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 16 | 39 contacts → | ||||
Exact match “Xinix is UK’s leading cloud-based unified communication provider making persistent efforts towards modernizing business communications.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 17 | 37 contacts → | ||||
Exact match “At Prime Networks, we firmly believe you can push your business to its full potential with our IT solutions.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 18 | 34 contacts → | ||||
Exact match “With over three decades of experience in the communications and technology sector, Commercis has established itself as a trusted leader in delivering global connectivity…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 19 | 34 contacts → | ||||
Exact match “Zamir Telecom Limited (ZTL) is a global leader in providing solutions for Internet and Telecommunication sectors.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 20 | 33 contacts → | ||||
Exact match “Your Comms Group: Connecting Beyond Words.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 21 | 29 contacts → | ||||
Exact match “Proudly established in 2007, Avertec provides reliable technology solutions to help businesses stay connected, specialising in business telecoms, business mobile, landlines and…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 22 | 27 contacts → | ||||
Exact match “Panoptics is an innovative IT Service provider focussed on simplifying complexity.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 23 | 26 contacts → | ||||
Exact match “Powering UK businesses for over 30 years, we’re a leading, award-winning family-run provider of mobile, connectivity, and cloud telecoms solutions.” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 24 | 25 contacts → | ||||
Exact match “Alfonica is an award-winning provider of innovative connectivity and bespoke business communication solutions, known for delivering excellent customer service to a highly…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
| 25 | 18 contacts → | ||||
Exact match “QXTEL is one of the most advanced & diversified Telecommunications & Technology Services Provider focused on Retail & Wholesale Voice Platform Partioning, Wholesale Carrier Voice…” Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “business telecommunications providers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 225 business telecommunications providers based in London, United Kingdom
See the full list, filter by size, metro and specialty, and access 6,833 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Business telecommunications providers based in London, United Kingdom at a glance
As of Oct 9, 2026Companies by employee count
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 225 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 London, United Kingdom whose business descriptions match “business telecommunications providers” 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 6,833 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 October 9, 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.
Business telecommunications providers by metro in the United Kingdom
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 “business telecommunications providers”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many business telecommunications providers are there based in London, United Kingdom?
RevenueBase identified 225 company matches for business telecommunications providers associated with London, United Kingdom as of October 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?
Colt Technology Services tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in the United Kingdom has the most business telecommunications providers?
London leads the United Kingdom with 225 company records, followed by Manchester (41) and Birmingham (33).
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 6,833 professional contacts with verified work emails tracked across these 225 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 October 9, 2026.
Ready to reach these companies? Verified emails and direct dials for all 225 business telecommunications providers based in London, United Kingdom. Start with a free account, no credit card.
Download this list →Related lists
Business telecommunications providers by geography
- Business telecommunications providers based in Buenos Aires, Argentina
- Business telecommunications providers based in Melbourne, Australia
- Business telecommunications providers based in Sydney, Australia
- Business telecommunications providers based in Belo Horizonte, Brazil
- Business telecommunications providers based in Curitiba, Brazil
- Business telecommunications providers based in Porto Alegre, Brazil
- Business telecommunications providers based in Rio De Janeiro, Brazil
- Business telecommunications providers based in Sao Paulo, Brazil
- Business telecommunications providers based in Calgary, Canada
- Business telecommunications providers based in Mississauga, Canada
- Business telecommunications providers based in Montreal, Canada
- Business telecommunications providers based in Toronto, Canada
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.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Business telecommunications providers based in Buenos Aires, Argentina
- Business telecommunications providers based in Melbourne, Australia
- Business telecommunications providers based in Sydney, Australia
- Business telecommunications providers based in Belo Horizonte, Brazil
- Business telecommunications providers based in Curitiba, Brazil
- Business telecommunications providers based in Porto Alegre, Brazil
Company intelligence · public preview
Top 25 business telecommunications providers based in London, United Kingdom
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 225 matching company records for business telecommunications providers based in London, United Kingdom, with 18,849 tracked contacts and 6,833 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 9, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 business telecommunications providers based in London, United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Colt Technology Servicescolt.netHQ: London, United KingdomReported employees: 5,001-10,000 | London, United Kingdom | 5,001-10,000 | Exact match | 6,457 contacts → |
“Colt Technology Services (Colt) is a global digital infrastructure company which creates extraordinary connections to help businesses succeed.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Vodafone Businessvodafone.comHQ: London, United KingdomReported employees: 10001+ | London, United Kingdom | 10001+ | Exact match | 6,350 contacts → |
“Vodafone Business is part of the Vodafone Group.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  GAMMAgammagroup.coHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,624 contacts → |
“Gamma Communications is a leading provider of technology-based communication solutions across Europe.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Exponential-Eexponential-e.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 678 contacts → |
“Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Maintelmaintel.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 363 contacts → |
“Maintel is a communications managed services provider.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Bonlinebonline.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 161 contacts → |
“bOnline is UK’s leading provider of VoIP services for micro and small businesses.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Spitfire Network Services LTDspitfire.co.ukHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 106 contacts → |
“Spitfire Network Services is a UK-based, multi-award winning telecoms and ISP provider for businesses.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Sipcomsipcom.comHQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 80 contacts → |
“Sipcom exists to make you the hero of your business narrative by turning complexity into clarity.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Telapplianttelappliant.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 70 contacts → |
“Telappliant is an award-winning VoIP and cloud communications provider.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  AURAweareaura.comHQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 62 contacts → |
“Aura helps global enterprises streamline communications, customer experience and AI.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Citycomcitycom.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 50 contacts → |
“Citycom is one of the UK’s leading providers of business telecoms solutions, offering mobile, fixed and cloud services.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Fidelity Group Empowering Everything AS A Servicefidelity-group.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 49 contacts → |
“Fidelity Group is a leading UK software, telecommunications, and energy provider.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Voiceflexvoiceflex.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 47 contacts → |
“Voiceflex is an innovative and multi-award-winning wholesale communications provider and leading telecoms carrier of SIP, Hosted Telephony, Connectivity, Unified Communications…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Microtalkmicrotalk.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 45 contacts → |
“Microtalk: Wholesale SMS & Carrier-Grade Connectivity Simplified For over 15 years, Microtalk has empowered businesses globally with reliable voice, messaging, and cloud…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Simplify Networkssimplifynetworks.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 41 contacts → |
“Join us on the journey to redefine business communication.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  XINIXxinix.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 39 contacts → |
“Xinix is UK’s leading cloud-based unified communication provider making persistent efforts towards modernizing business communications.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Prime Networksprime-networks.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 37 contacts → |
“At Prime Networks, we firmly believe you can push your business to its full potential with our IT solutions.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Commerciscommercis.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 34 contacts → |
“With over three decades of experience in the communications and technology sector, Commercis has established itself as a trusted leader in delivering global connectivity…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Zamir Telecom LTDzamirtelecom.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Zamir Telecom Limited (ZTL) is a global leader in providing solutions for Internet and Telecommunication sectors.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Your Comms Groupyourcommsgroup.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 33 contacts → |
“Your Comms Group: Connecting Beyond Words.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Avertecavertec.co.ukHQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 29 contacts → |
“Proudly established in 2007, Avertec provides reliable technology solutions to help businesses stay connected, specialising in business telecoms, business mobile, landlines and…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Panopticspanoptics.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 27 contacts → |
“Panoptics is an innovative IT Service provider focussed on simplifying complexity.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Active Digitalactivedigital.co.ukHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“Powering UK businesses for over 30 years, we’re a leading, award-winning family-run provider of mobile, connectivity, and cloud telecoms solutions.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Alfonicaalfonica.comHQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 25 contacts → |
“Alfonica is an award-winning provider of innovative connectivity and bespoke business communication solutions, known for delivering excellent customer service to a highly…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Qxtel Limitedqxtel.comHQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 18 contacts → |
“QXTEL is one of the most advanced & diversified Telecommunications & Technology Services Provider focused on Retail & Wholesale Voice Platform Partioning, Wholesale Carrier Voice…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 225 company matches
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Business telecommunications providers: dataset insights
October 9, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
224 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 225 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 9, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Business telecommunications providers by metro in the United Kingdom
Questions about this company list
What does Exact match mean for business telecommunications providers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many business telecommunications providers did RevenueBase find based in London, United Kingdom?
The saved snapshot records 225 matching company records, 18,849 tracked contacts and 6,833 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 9, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Business telecommunications providers by geography
- Business telecommunications providers based in Buenos Aires, Argentina
- Business telecommunications providers based in Melbourne, Australia
- Business telecommunications providers based in Sydney, Australia
- Business telecommunications providers based in Belo Horizonte, Brazil
- Business telecommunications providers based in Curitiba, Brazil
- Business telecommunications providers based in Porto Alegre, Brazil
- Business telecommunications providers based in Rio De Janeiro, Brazil
- Business telecommunications providers based in Sao Paulo, Brazil
- Business telecommunications providers based in Calgary, Canada
- Business telecommunications providers based in Mississauga, Canada
- Business telecommunications providers based in Montreal, Canada
- Business telecommunications providers based in Toronto, Canada
Cite this list
RevenueBase Data Team. Top 25 business telecommunications providers based in London, United Kingdom. Snapshot: October 9, 2026. https://revenuebase.ai/companies/business-telecommunications-providers/united-kingdom/london.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Business telecommunications providers based in Buenos Aires, Argentina
- Business telecommunications providers based in Melbourne, Australia
- Business telecommunications providers based in Sydney, Australia
- Business telecommunications providers based in Belo Horizonte, Brazil
- Business telecommunications providers based in Curitiba, Brazil
- Business telecommunications providers based in Porto Alegre, Brazil
Company intelligence · public preview
Top 25 business telecommunications providers based in London, United Kingdom
RevenueBase records 225 matching company records for business telecommunications providers based in London, United Kingdom, with 18,849 tracked contacts and 6,833 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 9, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 business telecommunications providers based in London, United Kingdom
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Colt Technology Servicescolt.net HQ: London, United KingdomReported employees: 5,001-10,000 | London, United Kingdom | 5,001-10,000 | Exact match | 6,457 contacts → |
“Colt Technology Services (Colt) is a global digital infrastructure company which creates extraordinary connections to help businesses succeed.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Vodafone Businessvodafone.com HQ: London, United KingdomReported employees: 10001+ | London, United Kingdom | 10001+ | Exact match | 6,350 contacts → |
“Vodafone Business is part of the Vodafone Group.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | GAMMAgammagroup.co HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 1,624 contacts → |
“Gamma Communications is a leading provider of technology-based communication solutions across Europe.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Exponential-Eexponential-e.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 678 contacts → |
“Innovation is at the core of Exponential-e, and has been since our inception in 2002.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Maintelmaintel.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 363 contacts → |
“Maintel is a communications managed services provider.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Bonlinebonline.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 161 contacts → |
“bOnline is UK’s leading provider of VoIP services for micro and small businesses.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Spitfire Network Services LTDspitfire.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 106 contacts → |
“Spitfire Network Services is a UK-based, multi-award winning telecoms and ISP provider for businesses.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Sipcomsipcom.com HQ: London, United KingdomReported employees: 501-1,000 | London, United Kingdom | 501-1,000 | Exact match | 80 contacts → |
“Sipcom exists to make you the hero of your business narrative by turning complexity into clarity.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Telapplianttelappliant.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 70 contacts → |
“Telappliant is an award-winning VoIP and cloud communications provider.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | AURAweareaura.com HQ: London, United KingdomReported employees: 1,001-5,000 | London, United Kingdom | 1,001-5,000 | Exact match | 62 contacts → |
“Aura helps global enterprises streamline communications, customer experience and AI.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Citycomcitycom.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 50 contacts → |
“Citycom is one of the UK’s leading providers of business telecoms solutions, offering mobile, fixed and cloud services.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Fidelity Group Empowering Everything AS A Servicefidelity-group.co.uk HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 49 contacts → |
“Fidelity Group is a leading UK software, telecommunications, and energy provider.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Voiceflexvoiceflex.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 47 contacts → |
“Voiceflex is an innovative and multi-award-winning wholesale communications provider and leading telecoms carrier of SIP, Hosted Telephony, Connectivity, Unified Communications…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Microtalkmicrotalk.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 45 contacts → |
“Microtalk: Wholesale SMS & Carrier-Grade Connectivity Simplified For over 15 years, Microtalk has empowered businesses globally with reliable voice, messaging, and cloud…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Simplify Networkssimplifynetworks.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 41 contacts → |
“Join us on the journey to redefine business communication.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | XINIXxinix.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 39 contacts → |
“Xinix is UK’s leading cloud-based unified communication provider making persistent efforts towards modernizing business communications.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Prime Networksprime-networks.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 37 contacts → |
“At Prime Networks, we firmly believe you can push your business to its full potential with our IT solutions.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Commerciscommercis.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 34 contacts → |
“With over three decades of experience in the communications and technology sector, Commercis has established itself as a trusted leader in delivering global connectivity…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Zamir Telecom LTDzamirtelecom.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Zamir Telecom Limited (ZTL) is a global leader in providing solutions for Internet and Telecommunication sectors.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Your Comms Groupyourcommsgroup.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 33 contacts → |
“Your Comms Group: Connecting Beyond Words.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Avertecavertec.co.uk HQ: London, United KingdomReported employees: 201-500 | London, United Kingdom | 201-500 | Exact match | 29 contacts → |
“Proudly established in 2007, Avertec provides reliable technology solutions to help businesses stay connected, specialising in business telecoms, business mobile, landlines and…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Panopticspanoptics.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 27 contacts → |
“Panoptics is an innovative IT Service provider focussed on simplifying complexity.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Active Digitalactivedigital.co.uk HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 26 contacts → |
“Powering UK businesses for over 30 years, we’re a leading, award-winning family-run provider of mobile, connectivity, and cloud telecoms solutions.” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Alfonicaalfonica.com HQ: London, United KingdomReported employees: 51-200 | London, United Kingdom | 51-200 | Exact match | 25 contacts → |
“Alfonica is an award-winning provider of innovative connectivity and bespoke business communication solutions, known for delivering excellent customer service to a highly…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Qxtel Limitedqxtel.com HQ: London, United KingdomReported employees: 11-50 | London, United Kingdom | 11-50 | Exact match | 18 contacts → |
“QXTEL is one of the most advanced & diversified Telecommunications & Technology Services Provider focused on Retail & Wholesale Voice Platform Partioning, Wholesale Carrier Voice…” Recorded description excerpt · October 9, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 225 company matches
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Business telecommunications providers: dataset insights
October 9, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
224 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 225 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 9, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Business telecommunications providers by metro in the United Kingdom
Questions about this company list
What does Exact match mean for business telecommunications providers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many business telecommunications providers did RevenueBase find based in London, United Kingdom?
The saved snapshot records 225 matching company records, 18,849 tracked contacts and 6,833 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 9, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Business telecommunications providers by geography
- Business telecommunications providers based in Buenos Aires, Argentina
- Business telecommunications providers based in Melbourne, Australia
- Business telecommunications providers based in Sydney, Australia
- Business telecommunications providers based in Belo Horizonte, Brazil
- Business telecommunications providers based in Curitiba, Brazil
- Business telecommunications providers based in Porto Alegre, Brazil
- Business telecommunications providers based in Rio De Janeiro, Brazil
- Business telecommunications providers based in Sao Paulo, Brazil
- Business telecommunications providers based in Calgary, Canada
- Business telecommunications providers based in Mississauga, Canada
- Business telecommunications providers based in Montreal, Canada
- Business telecommunications providers based in Toronto, Canada
Cite this list
RevenueBase Data Team. Top 25 business telecommunications providers based in London, United Kingdom. Snapshot: October 9, 2026. https://revenuebase.ai/companies/business-telecommunications-providers/united-kingdom/london.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
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- Business telecommunications providers based in Buenos Aires, Argentina
- Business telecommunications providers based in Melbourne, Australia
- Business telecommunications providers based in Sydney, Australia
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- Business telecommunications providers based in Curitiba, Brazil
- Business telecommunications providers based in Porto Alegre, Brazil