WhoCalled.org.uk exists for a simple reason: most people have had that awkward moment when the phone rings, the number looks unfamiliar, and something about the call already feels off. We built this service to make that moment easier. Instead of guessing, people can search the number, read what others experienced, and decide what to do next with a bit more confidence.
The site focuses on UK telephone numbers and the calls people here actually receive every day: scam attempts, nuisance sales calls, robocalls, silent calls, repeat spam, and the occasional legitimate caller who gave too little context to be trusted on first contact.
What the service does
At heart, WhoCalled.org.uk is a public lookup service supported by community reporting. Visitors search a number, read recent comments, and add their own experience if they have something useful to share. Over time that creates a practical record around a number: who called, what they claimed to be, whether the call sounded legitimate, and whether other people saw the same pattern.
We also publish guidance on common phone problems such as spoofed numbers, blocking tools, scam scripts, reporting routes, and privacy protection. The aim is not to sound dramatic. The aim is to be useful.
How we think about trust
Unknown numbers are not automatically dangerous. A school, GP practice, courier, recruiter, bank fraud team, or neighbour using a borrowed phone can all appear as unfamiliar callers. That is why we try to stay measured in tone. We would rather help someone slow down and verify a number than frighten them into assuming the worst every time their phone rings.
The same principle applies to user comments. Reports are valuable because they are immediate and specific, but they are still individual accounts. We encourage visitors to look for patterns, not just single remarks.
Who this is for
This service is for anyone in the UK who wants a quick, practical way to check a number before calling back, answering again, or sharing personal information. It is especially useful for people tired of nuisance calls, families trying to support older relatives, and anyone who has been caught off guard by a convincing scam approach.
A lot of harm caused by telephone fraud is preventable if people get a short pause to think. That pause is often what a number lookup provides.
How we collect and manage data
The site combines several sources of information to make number lookups more useful:
| Data Source | How It Works |
|---|---|
| Community reports | Visitors share their experience after receiving a call. Reports are reviewed before publication and each report carries the category the user selected (Safe, Nuisance, Dangerous, or Neutral). |
| Number allocation data | UK phone numbers are assigned to operators and geographic areas by Ofcom. We use publicly available allocation information to show which area code and general region a number belongs to. |
| Search and reporting patterns | When multiple people search the same number or report similar experiences, those patterns help confirm whether a number is widely seen as problematic. |
| Moderation and risk scoring | Reports are moderated to filter out spam, abuse, and off-topic content. An automated risk score (1-3) is calculated from community report categories to give a quick indication of how previous callers rated the number. |
For a more detailed explanation of our data practices, see our Methodology page and Privacy Policy.
How the site is funded
WhoCalled.org.uk is operated by TRUECALLER LTD and funded through advertising. Display ads shown on the site help cover hosting, moderation, development, and operational costs while keeping the core lookup and reporting service free for everyone to use.
If you need to contact us about a correction, privacy concern, or moderation issue, please use the contact page. For operator details, see the legal notice.