About CallerCheck
Helping UK residents identify unknown callers and stay safe from phone scams.
Making Phone Safety Accessible to Everyone
Every day, millions of UK residents receive unwanted calls from scammers, telemarketers, and fraudsters. These calls are more than an annoyance. Criminals stole £1.28 billion through payment fraud in 2025 according to UK Finance, and the distress they cause goes far beyond the money.
CallerCheck was built to fight back. We believe everyone deserves to know who's calling before they answer, and that protecting yourself from phone fraud shouldn't cost a penny.
Our platform, driven by community reports, lets people share their experiences, warn others about scam numbers, and make informed decisions about unknown callers.
Protection Powered by the Community
Search
Look up any UK phone number to see reports from our community. No registration needed.
Report
Share your experience with unknown callers. Mark numbers as spam or safe to help others.
Protect
Make informed decisions about answering calls. Together, we're building a safer phone network.
What CallerCheck Offers
Phone Number Lookup
Search any UK phone number to see community reports, its spam score and the area or network it belongs to. Works with landlines, mobiles and other UK numbers.
Spam Scores
Our spam scores are based on community reports, giving you a quick indication of whether a number is likely to be safe or suspicious.
Community Reports
Read detailed reports from real people who've received calls from the same number. Learn what callers said and whether they're legitimate.
Area Code Directory
See where calls are coming from with our UK area code directory. Know if a call is local or from across the country.
Safety Guides
Learn how to protect yourself with our guides on blocking calls, recognising scams, and reporting nuisance callers to authorities.
Scam Alerts
Stay informed about the latest phone scams targeting UK residents. Know what to look out for before you receive that suspicious call.
CallerCheck for iPhone
Get a warning when a reported scam number rings, check numbers and send reports on the go. Download on the App Store.
Number Alerts
Follow a number and we'll email you when someone new reports it, so you know if it keeps calling people.
For Businesses
Own a number that's listed? Claim it from its page to add your own statement, so people know who's calling.
What We Stand For
Privacy First
We don't require accounts, collect as little as we can, and never sell your data. Your privacy matters.
Community Driven
Our reports come from real people sharing real experiences. Together, we're stronger.
Free to Use
Phone safety is a right, not a privilege. Checking numbers and reporting calls will always be free.
The Scale of the Problem
Sources: UK Finance Annual Fraud Report 2026 and Ofcom scams research.
Phone Scams Affect Everyone
Phone scams aren't just an inconvenience. They're a serious threat to people's financial security and emotional wellbeing. Fraudsters are becoming more sophisticated, using technology to spoof caller IDs and impersonate trusted organisations.
The impact goes beyond money. Victims often experience shame, anxiety, and a loss of trust. Many are reluctant to answer the phone at all, potentially missing important calls from doctors, family, and legitimate businesses.
CallerCheck exists to shift the balance of power back to ordinary people. By sharing information, we can make it harder for scammers to operate and easier for everyone to stay safe.
Frequently Asked
Is CallerCheck really free?
Where does your data come from?
Can I report a number anonymously?
Ready to Check a Number?
Search our database of community reports to find out who's been calling you.
Get in Touch
Have a question, suggestion, or need help? We'd love to hear from you.
Contact UsFind all our official links at bio.site/callercheck