WhoCalledMe is an Australian reverse phone lookup service that helps people identify unknown callers and stay informed about potentially unwanted calls. Its community-powered directory lets users search phone numbers and read reports about suspected scams, telemarketing, harassment and other nuisance calls. The site also highlights trending numbers and recent reports, giving visitors a way to see which numbers others are searching and what experiences they have shared.

Users can contribute by entering a phone number, describing the call or message, and submitting a report through the site. Reports may include the type and frequency of contact, along with details of any interaction. Contributors can choose whether to remain anonymous or provide contact information for follow-up. WhoCalledMe also offers a phone book, business directory, public-record listings and articles, alongside information about its process and safety. By collecting community reports and making them searchable, the service aims to help Australians make more informed decisions about unknown calls and share information that may help protect others.