UK Phone Number Lookup
Check who called or texted you from an unknown number. See what others report and get guidance on what to do next.
How it works
1. Enter the number
Paste or type the phone number you want to check. We handle all UK formats automatically.
2. See what others report
View aggregated, anonymous reports from others who received calls from the same number.
3. Stay safe
Get guidance on what to do next and report your own experience to help others.
Popular checks right now
Frequently asked questions
Is this service free?
Yes, CheckItFirst is completely free to use. We don't require registration or payment.
Can you tell me exactly who called?
We can't identify specific callers. We provide information about the number type, location (for landlines), and aggregated reports from other users.
How do I report a number?
Simply look up the number and use the report buttons on the page. Reports are anonymous and help others make informed decisions.