AnyWho Directories  Includes toll-free numbers and reverse look-ups
Bigfoot.com  Nationwide white and yellow pages directory
Canada411  Canadian personal and business listings
Country Calling Codes Calling codes, instructions on making international calls, and time zones
Federal Citizen Information Center: National Contact Center Directory of federal government toll-free telephone numbers
Go Toll Free “The Internet 800 directory”
Infobel - International Telephone Directories  Links to yellow pages, white pages, business directories, email addresses and fax listings from around the world
Internet Public Library:  Telephone and Address  “Directories on the Web listing telephone, fax numbers, street addresses and e-mail addresses for people and businesses”
Open Directory Project:  Address and Phone Numbers Extensive list of online directories
DexKnows.com  Nationwide yellow and white pages courtesy of Qwest
Reverse Phone Directory Reverse lookups by phone number and address, plus area codes and zip codes
Seccion Amarilla Yellow and white pages for Mexico, in Spanish
Superpages.com Verizon’s white and yellow page listings
Switchboard  Nationwide personal and business listings, plus maps
Ultimate White Pages  Search Infospace, Dogpile, Whitepages.com, Yahoo, WhoWhere, and Switchboard, plus reverse directory and maps
United States Postal Service Zip Code Lookup Input an address to find the zip+4
Whitepages.com Includes reverse phone number, address, and area code searches
Yahoo!  People Search Search for email addresses as well as phone numbers
Yellow Book “Complete local yellow pages nationwide”
ZabaSearch "People search and public information search engine"