AnyWho Directories

General web directory which allows you to look up personal and business phone numbers, maps, websites, businesses, & fax numbers. Also has reverse lookup feature, which is very useful in attributing an unknown phone number to a person.

BellSouth Real Pages

BellSouth white and yellow pages online.

Big Yellow

Yellow page listings let you find business phone numbers and addresses.

Infospace.com

"Find people, places and things." For a fee, you can also order public record reports of people.

555-1212.com

White and yellow pages. Also allows you to do reverse lookups, and search international directories.

BigBook

"Nationwide yellow pages."

Yahoo! People Search

General web directory. Allows you to find a person's email address or phone number.

Switchboard

General web directory.

Lycos Network

"WhoWhere? People finder."

Worldpages

International white and yellow pages.

AltaVista Connections

Find a business near you, find a person, & get directions. Can also translate text from and into different languages using the "Babel Fish."

Telecommunications Research & Action Center

"Directory assistance via the internet."