Free UK Phone Number Tools
Simple, free tools for anyone dealing with UK phone numbers: check a number, format it correctly, find a dialling code, or warn others about an unwanted call.
UK Phone Number Checker
Is this a valid UK number? Landline or mobile? Where is it from?
- Number type, area and range holder
- UK, +44 international and E.164 formats
- How to dial it from the USA or Europe
- Check up to 500 numbers at once, download CSV
UK Area Code Finder
Find the dialling code for any UK town, or which place a code belongs to.
- All UK area codes, searchable by town or code
- A to Z list of towns and cities
- How to dial each code from abroad
Call the UK from Abroad
What to dial from the USA, Australia, Spain, India and 35 more countries.
- Dial builder: pick a country, type a number
- Exit codes, examples and time difference
UK Call Cost Checker
Is it free, normal rate or premium? Check 03, 0800, 084, 087 and 09 numbers before you call.
Check a call cost →Scam Alerts
How the most common UK phone scams work, the warning signs and the numbers people reported.
See scam alerts →Report a Number
Got a scam, sales or silent call? Warn others in under a minute.
Report a number →How to Block Calls
Step-by-step for iPhone, Android, BT and other landlines, plus the TPS.
Read the guide →Look up any number for free
Every UK number on Who Calls You has its own page with the number type, area, phone company and reports from people who received calls from it. Browse area codes, number types and UK phone companies, or see the latest reports.