Internet sites such as WhitePages.com and TollFreeDA.com are useful for searching for toll-free numbers by name or by reverse lookups. A reverse lookup on a toll-free number may be helpful to see where incoming calls are originating, or to check the availability of a vanity number.
AT&T provides TollFreeDA, a site that provides information for toll-free searches only. It collects data from a number of toll-free service providers, allows searches by name or reverse lookup and receives daily updates. Despite displaying the 800-555-1212 toll-free directory assistance number, it does not share the same database and may not offer as many numbers as the telephone-based service. It is free to use, however, and has an extensive database with AT&T support.