Free online phone directories, such as Whitepages or AnyWho, are available for users to look up listed residential phone numbers. Unlisted or cell phone numbers can often be obtained through paid services.
An online user may use a name, address or zip code when searching for a phone number. The results include a listing of possible matches for the user to choose from, and details such as full name, address and a map showing the exact location. Listings also include names of other contacts associated with the person.
Advanced features are available for a fee, such as background checks, marriage and divorce records, address history and social profiles.