AT&T Directory Assistance
Anywho is a free directory service with residential, business, and government white and yellow page listings.
http://www.anywho.com/
Infospace USA
The yellow pages and white pages directory from infospace is the most convenient way to find people and businesses.
http://www.infospace.com/
BellSouth Real Pages
BellSouth Real Pages
http://yp.bellsouth.com/?page=wp
Info USA
Mailing list - infousa has 30 years' experience providing mailing lists and email lists to businesses of all sizes. customize our mailing lists to your business needs. with over 14 million business and 300 million consumer sales leads in our databases, you can cull from our mailing lists and target invaluable sales leads to grow your business
http://www.infousa.com/
Switchboard
Telephone directory: internet yellow pages, internet white pages - you can find what is generally regarded as the best phone book online at switchboard.com. online maps, reverse phone number search and more.
http://www.switchboard.com/