How to check an unknown number safely
A missed call does not need an immediate reply. Work through these checks before deciding whether to call back.
Start with the call, not a conclusion
An unfamiliar number might belong to a delivery driver, a business, a wrong-number caller or someone trying to deceive you. The number alone cannot settle that question. Let a call go to voicemail if you are unsure, and review the message when you have time to think.
Save the time, displayed number and any message before blocking or deleting it. You do not need to engage with the caller to collect these basics. Avoid returning a short missed call simply out of curiosity; Ofcom warns that some missed-call schemes try to prompt a callback that can carry high charges.
Search the complete number
Use the full UK number, including its leading zero or international +44 format. On this website, spaces and common formatting are normalised so equivalent versions lead to the same page. Read the report descriptions rather than relying on a headline label.
Check whether accounts describe a similar experience and whether the reports are recent. A report about an unsolicited sales call is different from a report about demands for payment. Neither establishes the identity of the person who called you today.
Verify any organisation independently
If a caller claims to represent a business, open that organisation’s website or app yourself. Use a contact route you already trust. Do not use a number, link or supposed verification service supplied during the suspicious call.
Explain that you received an unexpected call and ask whether there is a genuine matter requiring attention. If you cannot verify it, there is no need to continue the original conversation.
Understand an empty result
No reports means no reports, not that the number is safe. New or spoofed numbers may have no history, and a reassigned number may have reports about a previous user. Geographic information describes a numbering area, not a live location.
Share useful context
If you report the call, describe the request and what you observed. Use “claimed to be” for an unverified organisation. Leave out private names, addresses and financial details. Our reporting policy explains how reports are reviewed and how assessments are calculated.
Sources & further reading
For a situation involving money already sent, contact your bank promptly using contact details you trust.
Have a number to check?
Search a number to read reports or share your experience. No account required.