Guides
Long-form, citation-rich guides on UK telephone numbering, common scam patterns, and how to identify any UK caller using free public data.
- Lookup
Who called me? UK reverse phone lookup guide
How to identify an unknown UK caller in seconds using free public data — Ofcom range data, community scam reports, and a live AI internet check.
12 Apr 2026
- Lookup
UK phone number lookup — the complete 2026 guide
How 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.
20 Apr 2026
- Lookup
Free UK reverse phone lookup — no signup
Free 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.
22 Apr 2026
- Lookup
UK phone number checker — validate any UK number
A 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.
24 Apr 2026
- Lookup
Whose number is this? Identify any UK number
Whose 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.
26 Apr 2026
- Lookup
Check this phone number — UK lookup in 30s
Need 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.
28 Apr 2026
- Lookup
How to find out who called me — UK 2026 guide
How 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.
30 Apr 2026
- Lookup
Identify a UK caller — network, provider, type
Identify 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.
2 May 2026
- Lookup
British phone number search — landline or mobile
British 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.
4 May 2026
- Safety
Common 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.
12 Apr 2026
- Safety
Is this number a scam? UK fraud-call detection in 2026
Is 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.
6 May 2026
- Safety
How 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.
12 Apr 2026
- Safety
How 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.
12 Apr 2026
- Reference
UK phone number format — E.164, regex, rules
The complete UK phone number format reference: E.164 spec, the libphonenumber regex, valid prefixes, length rules, and a working JavaScript validator.
8 May 2026
- Reference
Validate 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.
9 May 2026
- Reference
UK phone number validation API — 2026 guide
Compare the major UK phone number validation APIs (Twilio, Numverify, Vonage, MessageBird) on accuracy, cost, carrier data and Ofcom-equivalent coverage.
10 May 2026
- Reference
UK number cleansing for CRM — 2026 playbook
How to cleanse a UK phone number list in your CRM: format normalisation, libphonenumber, carrier-aware deduplication, TPS suppression, and Ofcom-aware quality scoring.
11 May 2026
- How it works
How Ofcom allocates UK phone numbers
Inside the National Telephone Numbering Plan: blocks, sub-allocations, porting, status flags, and the weekly numbering data feed that powers UK reverse lookups.
12 Apr 2026
- How it works
Range Holder vs current provider explained
Why 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.
12 Apr 2026
- How it works
AI internet check vs database lookup compared
Why combining structured Ofcom data with an LLM-powered web search is more accurate than either signal alone for UK reverse phone lookup.
12 Apr 2026
- Number types
How 0800 freephone numbers work in the UK
Who pays for an 0800 call, how routing works, the difference vs 0808, and why scammers use freephone numbers too. UK 2026 explainer.
12 Apr 2026
- Number types
0808 numbers UK — cost, callers, who uses them
What 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.
15 Apr 2026
- Number types
0345 numbers UK — is 0345 free to call?
Is 0345 free to call in the UK? Yes if you have inclusive mobile minutes. Here is the full 0345 explainer: cost, who uses 0345, and how to identify an 0345 caller.
17 Apr 2026
- Number types
0345 vs 0800: which is cheaper from a UK mobile?
0345 vs 0800 explained — what each costs from mobiles and landlines in 2026, why businesses pick one over the other, and what it means for you.
12 Apr 2026
- Number types
0333 numbers UK — cost, callers, is it premium?
0333 numbers explained — costs, common uses, why so many UK businesses pick them, and how to recognise legitimate vs scam 0333 calls.
12 Apr 2026
- Number types
What 0843, 0844 and 0871 cost — and why they exist
Service charges, access charges and how to spot expensive 'business-rate' numbers in the UK. Includes 2026 price ceilings and free-alternative finders.
12 Apr 2026
- Safety
070 personal-numbering scams — 070 is not mobile
An 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.
12 Apr 2026
- Reference
UK area codes — every 01/02 dialling code
What 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.
18 Apr 2026
- Reference
020 London — 0203, 0207, 0208, 0204 explained
What 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.
19 Apr 2026
- Number types
0330 numbers UK — cost, callers, what to know
0330 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.
21 Apr 2026