CallerSmart is a phone information service that helps people identify unfamiliar callers and learn more about phone numbers. Its online community phone book offers free search results, with the option to search paid databases for additional information about a number’s owner. The service addresses a gap in traditional telephone directories, which generally do not list mobile numbers, and provides access to caller name information, known as CNAM, on iPhone.

CallerSmart also offers an iOS app, along with online resources including a blog and help materials. Its articles explain topics such as caller ID, phone number recycling, directory reliability, and caller ID spoofing, helping users understand why search results may be incomplete or outdated. Because phone numbers can be reassigned and caller information can be manipulated, directory results are not always accurate. CallerSmart presents its free and paid search options as ways to look up a number, while its educational content offers guidance on interpreting caller information and handling unwanted calls.