Company lists · Data refreshed September 2026

Top 14 24/7 call center operators based in the United Kingdom

RevenueBase identified 44 company matches for 24/7 call center operators associated with the United Kingdom as of September 2026 and tracks 933 professional contacts across them, including 123 with verified work emails. London is the largest hub.

This list covers company matches for 24/7 call center operators associated with the 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 September 27, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 27, 2026 How this list was built
44Companies
933Contacts tracked
123Verified emails
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The 14 largest 24/7 call center operators based in the United Kingdom

Ranked by team size
Top 14 of 44 company matches for 24/7 call center operators based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 27, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSheffield, United KingdomHQ recorded Sep 27, 2026501-1,000327 contacts →

Exact match

“Skilled talent, proven processes and leading technology.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
2Exact matchBristol, United KingdomHQ recorded Sep 27, 202651-20083 contacts →

Exact match

“We are Subfero.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
3Exact matchNantgawr, United KingdomHQ recorded Sep 27, 2026201-50073 contacts →

Exact match

“We’re a 24/7 specialist outsourced Contact Centre business.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 27, 20261,001-5,00059 contacts →

Exact match

“CallCare is your outsourced contact centre and customer service partner.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
5Exact matchCrewe, United KingdomHQ recorded Sep 27, 202651-20052 contacts →

Exact match

“Cymphony is your 24/7 customer support partner.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 27, 202611-5040 contacts →

Exact match

“Kingdom Vision is a medium to take your business from good to great.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
7Exact matchCroydon, United KingdomHQ recorded Sep 27, 2026501-1,00039 contacts →

Exact match

“For over 20 years, Chase Response has delivered unrivalled standards in call centre outsourcing and customer management services.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
8Exact matchDaventry, United KingdomHQ recorded Sep 27, 202611-5013 contacts →

Exact match

“At SinglePoint Calls, we pride ourselves on being the 'Best Kept Secret' Our aim is to provide an exceptional level of service that is indistinguishable from having an in-house…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
9Exact matchNewbury, United KingdomHQ recorded Sep 27, 202611-5011 contacts →

Exact match

“UK Outsource Specialists – First Call Helpdesk At First Call Helpdesk, we don’t just provide support-we co-create seamless customer experiences that strengthen businesses.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 27, 20261-107 contacts →

Exact match

“At alaouico, we understand the challenges businesses face with customer interactions-whether it's managing high call volumes, ensuring timely responses, or maintaining customer…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
11Exact matchBarnstaple, United KingdomHQ recorded Sep 27, 202651-2005 contacts →

Exact match

“Pressplay Call Centre is part of the Pressplay group which has been working in contact centre and fulfilment services for over 20 years with a team that combines years of industry…”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
12Exact matchNottingham, United KingdomHQ recorded Sep 27, 202651-2003 contacts →

Exact match

“Integrated Communication Services (ICS) are a 24/7/365 call centre operation based in central England.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
13Exact matchConsett, United KingdomHQ recorded Sep 27, 20261-103 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase
14Exact matchGlasgow, United KingdomHQ recorded Sep 27, 20261-101 contacts →

Exact match

“2gether Property Maintenance provides a 24 7 nationwide reactive maintenance services, 365 days a year.”

Recorded in the RevenueBase company graph · Sep 27, 2026 · View company records in RevenueBase

Showing 14 of 44 24/7 call center operators based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 123 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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24/7 call center operators based in the United Kingdom at a glance

As of Sep 27, 2026
13.2%Verified-email coverage
21.2Average contacts per company
51-200Median size (employees)
25.0%Largest-city concentration · London
Sep 27, 2026Page data refreshed

Companies by employee count

1-10
9
11-50
10
51-200
14
201-500
5
501-1,000
4
1,001-5,000
2

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 44 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 the United Kingdom whose business descriptions match “24/7 call center operators” 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 123 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 September 27, 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.

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 “24/7 call center operators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many 24/7 call center operators are there based in the United Kingdom?

RevenueBase identified 44 company matches for 24/7 call center operators associated with the United Kingdom as of September 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?

ANT Marketing tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most 24/7 call center operators?

London leads with 11 company records, followed by Bristol (2) and Au (1).

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 123 professional contacts with verified work emails tracked across these 44 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 September 27, 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 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.