The phone number 1-800-FREE-411, or 1-800-373-3411, provides toll-free directory assistance. When called, the number may play a short ad before connecting callers to the requested number. 1-800-FREE-411 optionally connects callers to the advertising business instead of to the requested number.
1-800-FREE-411 uses a voice recognition system to process calls, and the service often plays no ads at all. 1-800-FREE-411, along with other free telephone services, may log unlisted numbers, such as cellphone numbers, for sale to telemarketers.
Many websites provide online phone directories, such as YellowPages.com, 411.com and WhitePages.com. Some, such as YellowPages.com, also list user reviews for many businesses.