United Kingdom ISP & Telecom Provider Contact Details
The UK has no ISP licensing regime and Ofcom holds no register of every provider. The one official Ofcom dataset that carries provider contact details is its numbering data: the Reseller Identification (RID) codes it allocates to communications providers that resell fixed-line and broadband services, each recorded with a postal address and contact number. This directory reproduces the Ofcom register as of 10 September 2026: 7,361 communications providers with an Ofcom RID code. There is no designated agent for legal process in this data; address requests to the provider's registered office (verify against Companies House) or its published law-enforcement single point of contact.
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Providers are listed by registered name. Each page has its own search box that also matches trade names, contacts, cities and regions.
About this data
Source: Ofcom numbering data: Reseller Identification (RID) code allocations (RID.csv), cross-referenced with Ofcom's Register of persons with powers under the Electronic Communications Code and the 2026/27 administrative-charges list, retrieved 10 September 2026 from the regulator’s published register. The UK has no licensing regime and Ofcom holds no register of all ISPs or telecoms operators (Ofcom FOI 01896149, 2024; FOI 01698568, 2023). This list is the only official Ofcom dataset carrying provider contact details: the 3-letter RID codes Ofcom allocates to resellers of fixed-line and broadband services, each with a postal address and contact number as supplied by the provider at allocation. It over-represents fixed-line/broadband resellers and under-represents pure mobile operators, network-only operators and providers that never requested a RID; contact details date from the allocation (bulk of records 2014-2016) and may be stale. Email and website are not published by Ofcom. Entries also tagged 'Code powers operator' or 'billed for Ofcom administrative charges' were matched by normalised company name against Ofcom's ECC register (293 names) and 2026/27 admin-charges list (138 names). Names and contact details are reproduced as published; the regulator is the authority and should be checked before serving legal process. See the directory hub for other countries and the LERS portal guides for platform and app data requests.