555-1212 Online - Directory assistance online.

Big Book Yellow Pages - 16 million business addresses quickly, address books, people finders

Four11 Directories - The internet white pages, add your name if it is not already in the directory

InfoSpace - General multi-purpose directory

National Address Server - Given a valid U.S. postal address, this server attempts to rewrite the address in the proper format along with the ZIP+4 code

Telephone Directories on the Web - index of phone books from all around the world, this is the Internet's original and most detailed listing of online white pages, yellow pages, and fax directories

United States Postal Service - The online version of your local post office

USPS Zip Codes - ZIP code lookup and address information from the US postal service

WhoWhere? - All kinds of searches and listings

World Pages - A thorough site for finding business addresses, people, government, etc.

Yellowbook