https://whocalledlookup.co.uk/2026-05-15https://whocalledlookup.co.uk/og.svgWhoCalledLookup — Who called me?Look up any UK phone number. See the Ofcom-allocated range holder, area code, and a live AI internet check pulling forum reports, scam databases, and business listings.https://whocalledlookup.co.uk/area2026-05-15https://whocalledlookup.co.uk/og.svgUK area-code indexBrowse every UK 01/02/03 dialling code with the principal town and region.https://whocalledlookup.co.uk/holder2026-05-15https://whocalledlookup.co.uk/og.svgUK range-holder indexEvery UK communications provider with allocated number ranges.https://whocalledlookup.co.uk/blog/who-called-me-uk2026-05-15https://whocalledlookup.co.uk/og.svgWho called me? UK reverse phone lookup guideHow to identify an unknown UK caller in seconds using free public data — Ofcom range data, community scam reports, and a live AI internet check.https://whocalledlookup.co.uk/blog/uk-phone-number-lookup2026-05-15https://whocalledlookup.co.uk/og.svgUK phone number lookup — the complete 2026 guideHow UK phone number lookup actually works in 2026: what data sources are public, which tools are free, what 'Range Holder' really tells you, and how to identify any UK landline, mobile or non-geographic number in seconds.https://whocalledlookup.co.uk/blog/reverse-phone-lookup-uk2026-05-15https://whocalledlookup.co.uk/og.svgFree UK reverse phone lookup — no signupFree UK reverse phone lookup using official Ofcom data and a live AI internet check. No signup, no card, no premium tier — paste any UK number and get the answer.https://whocalledlookup.co.uk/blog/phone-number-checker-uk2026-05-15https://whocalledlookup.co.uk/og.svgUK phone number checker — validate any UK numberA free UK phone number checker that does three jobs: validates the format, identifies the line type, and verifies the number against Ofcom + a live AI internet check. No signup.https://whocalledlookup.co.uk/blog/whose-number-is-this-uk2026-05-15https://whocalledlookup.co.uk/og.svgWhose number is this? Identify any UK numberWhose number is this? Identify the UK communications provider, line type, and public reputation of any UK phone number using free Ofcom data and a live AI check.https://whocalledlookup.co.uk/blog/check-this-phone-number2026-05-15https://whocalledlookup.co.uk/og.svgCheck this phone number — UK lookup in 30sNeed to check this phone number now? Paste it into our free UK phone number checker and see the Ofcom range holder, line type and live AI internet check in seconds.https://whocalledlookup.co.uk/blog/how-to-find-out-who-called-me-uk2026-05-15https://whocalledlookup.co.uk/og.svgHow to find out who called me — UK 2026 guideHow to find out who called you in the UK using free public data: Ofcom range holder lookup, live AI internet check, community boards and the right way to call back safely.https://whocalledlookup.co.uk/blog/identify-uk-caller2026-05-15https://whocalledlookup.co.uk/og.svgIdentify a UK caller — network, provider, typeIdentify the network, provider and line type of any UK caller using the official Ofcom range data plus a live AI internet check. Free, no signup, in seconds.https://whocalledlookup.co.uk/blog/british-phone-number-search2026-05-15https://whocalledlookup.co.uk/og.svgBritish phone number search — landline or mobileBritish phone number search using free official Ofcom data and a live AI internet check. Find the provider, area, line type and reputation of any UK number.https://whocalledlookup.co.uk/blog/scam-numbers-uk2026-05-15https://whocalledlookup.co.uk/og.svgCommon UK scam-call patterns (2026)The eight most common UK call-scams in 2026, with red flags, real examples, and the right response for each. Includes Action Fraud and 159 reporting routes.https://whocalledlookup.co.uk/blog/is-this-uk-number-a-scam2026-05-15https://whocalledlookup.co.uk/og.svgIs this number a scam? UK fraud-call detection in 2026Is this UK number a scam? Use this checklist of free signals — Ofcom range data, live AI internet check, spoofed CLI red flags and reporting routes — to decide in 60 seconds.https://whocalledlookup.co.uk/blog/block-spam-calls-uk2026-05-15https://whocalledlookup.co.uk/og.svgHow to block UK spam calls (2026 guide)Network blocklists, iOS / Android settings, third-party apps and the TPS register — what actually works to stop UK spam calls in 2026.https://whocalledlookup.co.uk/blog/report-scam-call-uk2026-05-15https://whocalledlookup.co.uk/og.svgHow to report a scam call in the UK (2026)Action Fraud, 7726, your bank, the regulator — who to tell, in what order, and what they actually do with the report.https://whocalledlookup.co.uk/blog/uk-phone-number-format-guide2026-05-15https://whocalledlookup.co.uk/og.svgUK phone number format — E.164, regex, rulesThe complete UK phone number format reference: E.164 spec, the libphonenumber regex, valid prefixes, length rules, and a working JavaScript validator.https://whocalledlookup.co.uk/blog/validate-uk-mobile-number2026-05-15https://whocalledlookup.co.uk/og.svgValidate a UK mobile number (2026 guide)How to validate a UK mobile number in 2026: format check, prefix check, libphonenumber-js code, plus carrier-aware paid APIs for bulk B2B work.https://whocalledlookup.co.uk/blog/uk-phone-number-validation-api2026-05-15https://whocalledlookup.co.uk/og.svgUK phone number validation API — 2026 guideCompare the major UK phone number validation APIs (Twilio, Numverify, Vonage, MessageBird) on accuracy, cost, carrier data and Ofcom-equivalent coverage.https://whocalledlookup.co.uk/blog/uk-number-cleansing-for-crm2026-05-15https://whocalledlookup.co.uk/og.svgUK number cleansing for CRM — 2026 playbookHow to cleanse a UK phone number list in your CRM: format normalisation, libphonenumber, carrier-aware deduplication, TPS suppression, and Ofcom-aware quality scoring.https://whocalledlookup.co.uk/blog/how-ofcom-numbering-works2026-05-15https://whocalledlookup.co.uk/og.svgHow Ofcom allocates UK phone numbersInside the National Telephone Numbering Plan: blocks, sub-allocations, porting, status flags, and the weekly numbering data feed that powers UK reverse lookups.https://whocalledlookup.co.uk/blog/range-holder-vs-current-provider2026-05-15https://whocalledlookup.co.uk/og.svgRange Holder vs current provider explainedWhy the network on caller ID often differs from the Ofcom-listed Range Holder, and how to use both signals together when you're trying to identify a UK caller.https://whocalledlookup.co.uk/blog/ai-vs-database-lookup2026-05-15https://whocalledlookup.co.uk/og.svgAI internet check vs database lookup comparedWhy combining structured Ofcom data with an LLM-powered web search is more accurate than either signal alone for UK reverse phone lookup.https://whocalledlookup.co.uk/blog/0800-numbers-uk2026-05-15https://whocalledlookup.co.uk/og.svgHow 0800 freephone numbers work in the UKWho pays for an 0800 call, how routing works, the difference vs 0808, and why scammers use freephone numbers too. UK 2026 explainer.https://whocalledlookup.co.uk/blog/0808-numbers-uk2026-05-15https://whocalledlookup.co.uk/og.svg0808 numbers UK — cost, callers, who uses themWhat does 0808 cost to call in the UK? Free from every line. Here is how 0808 freephone works, who allocates them, and how to identify an 0808 caller in seconds.https://whocalledlookup.co.uk/blog/0345-numbers-explained2026-05-15https://whocalledlookup.co.uk/og.svg0345 numbers UK — is 0345 free to call?Is 0345 free to call in the UK? Yes if you have inclusive mobile minutes. 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Includes 2026 price ceilings and free-alternative finders.https://whocalledlookup.co.uk/blog/070-personal-numbering2026-05-15https://whocalledlookup.co.uk/og.svg070 personal-numbering scams — 070 is not mobileAn 070 UK number looks like a mobile but isn't — it's a personal-numbering forwarding service. Here's why scammers love it, and how to identify one safely.https://whocalledlookup.co.uk/blog/uk-area-codes-explained2026-05-15https://whocalledlookup.co.uk/og.svgUK area codes — every 01/02 dialling codeWhat does each UK area code mean? Full guide to 01 and 02 dialling codes by region, with town look-ups, length rules and why some codes are 4 digits not 3.https://whocalledlookup.co.uk/blog/020-london-numbers-explained2026-05-15https://whocalledlookup.co.uk/og.svg020 London — 0203, 0207, 0208, 0204 explainedWhat is a 0203 number? Are 0207 and 0208 different parts of London? The full guide to 020 London sub-prefixes, who they were allocated to, and what called you.https://whocalledlookup.co.uk/blog/0330-numbers-explained2026-05-15https://whocalledlookup.co.uk/og.svg0330 numbers UK — cost, callers, what to know0330 numbers explained — what does 0330 cost, are 0330 calls free with a mobile bundle, and how to identify who called you from a 0330 number in seconds.