Company lists · Data refreshed November 2026

Top 25 24/7 call center services based in the United Kingdom

RevenueBase identified 103 company matches for 24/7 call center services associated with the United Kingdom as of November 2026 and tracks 1,665 professional contacts across them, including 231 with verified work emails. London is the largest hub.

This list covers company matches for 24/7 call center services 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 November 5, 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 Nov 5, 2026 How this list was built
103Companies
1,665Contacts tracked
231Verified emails
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The 25 largest 24/7 call center services based in the United Kingdom

Ranked by team size
Top 25 of 103 company matches for 24/7 call center services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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 Nov 5, 2026501-1,000347 contacts →

Exact match

“Skilled talent, proven processes and leading technology.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchHull, United KingdomHQ recorded Nov 5, 2026501-1,000205 contacts →

Exact match

“Established since 1998 Clearanswer is an expert provider of contact centre solutions.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchBristol, United KingdomHQ recorded Nov 5, 202651-20081 contacts →

Exact match

“We are Subfero.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchNottingham, United KingdomHQ recorded Nov 5, 202651-20073 contacts →

Exact match

“Founded in 2004 by the ICS Group Ltd, Answer4u is one of the UK’s fastest-growing 24/7 telephone answering services, trusted by more than businesses nationwide.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchNantgawr, United KingdomHQ recorded Nov 5, 2026201-50070 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Nov 5, 20261,001-5,00061 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchCrewe, United KingdomHQ recorded Nov 5, 202651-20053 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8Exact matchWrexham, United KingdomHQ recorded Nov 5, 202651-20053 contacts →

Exact match

“Orca offers flexible and adaptable call answering and live chat services that help clients manage costs effectively.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchCroydon, United KingdomHQ recorded Nov 5, 2026501-1,00040 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 · Nov 5, 2026 · View company records in RevenueBase
10Exact matchChippenham, United KingdomHQ recorded Nov 5, 2026201-50036 contacts →

Exact match

“As a boutique customer service provider, we put customers and colleagues at the heart of everything we do, helping businesses grow by connecting with their customers.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchPortsmouth, United KingdomHQ recorded Nov 5, 202651-20026 contacts →

Exact match

“Established in Frontline has become one of the UK's leading Telephone Answering Services.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchMansfield, United KingdomHQ recorded Nov 5, 202651-20019 contacts →

Exact match

“CommLink is a UK inbound call centre providing 24 x 7 support to businesses throughout the UK and in the US.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchBradford, United KingdomHQ recorded Nov 5, 20261-1017 contacts →

Exact match

“Professional call handling services built around your business.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchRedruth, United KingdomHQ recorded Nov 5, 202651-20016 contacts →

Exact match

“At Phoneta we’re always on the phone so you don’t have to be.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchNewbury, United KingdomHQ recorded Nov 5, 202611-5012 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 · Nov 5, 2026 · View company records in RevenueBase
16Exact matchDaventry, United KingdomHQ recorded Nov 5, 202611-5011 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 · Nov 5, 2026 · View company records in RevenueBase
17Exact matchCambridge, United KingdomHQ recorded Nov 5, 202611-5010 contacts →

Exact match

“Established in Zoom Answer Call is a Telephone Answering Service genuinely dedicated to providing the highest level of Customer Service in the industry.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchNewbury, United KingdomHQ recorded Nov 5, 202611-509 contacts →

Exact match

“Call Answering and Web Chat from The Phone Answering Specialists.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchIlkley, United KingdomHQ recorded Nov 5, 202611-509 contacts →

Exact match

“Netcall Solutions is an established call bureau, offering businesses of all sizes and sectors throughout the United Kingdom the opportunity to divert their incoming telephone…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Nov 5, 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 · Nov 5, 2026 · View company records in RevenueBase
21Exact matchShipley, United KingdomHQ recorded Nov 5, 202611-506 contacts →

Exact match

“UK Based Telephone Answering and Call Handling Services for all sizes and types of business.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchBarnstaple, United KingdomHQ recorded Nov 5, 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 · Nov 5, 2026 · View company records in RevenueBase
23Exact matchAndover, United KingdomHQ recorded Nov 5, 202611-505 contacts →

Exact match

“Angel Call Handling are award winning UK based experts in providing inbound & outbound call handling, Virtual Assistants, PA and admin support to businesses.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24Exact matchNottingham, United KingdomHQ recorded Nov 5, 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 · Nov 5, 2026 · View company records in RevenueBase
25Exact matchConsett, United KingdomHQ recorded Nov 5, 20261-103 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 25 of 103 24/7 call center services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 231 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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

As of Nov 5, 2026
13.9%Verified-email coverage
16.2Average contacts per company
11-50Median size (employees)
20.4%Largest-city concentration · London
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
30
11-50
30
51-200
23
201-500
7
501-1,000
6
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 103 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 services” 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 231 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 November 5, 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 services”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 103 company matches for 24/7 call center services associated with the United Kingdom as of November 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 services?

London leads with 21 company records, followed by Birmingham (3) and Newbury (3).

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 231 professional contacts with verified work emails tracked across these 103 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 November 5, 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.