(...)After going live in February 1996, Switchboard.com achieved rapid success on the Internet by being the first to market with a free, national directory of U.S. residential information. Prior to that, most people at home and in the workplace had little or no access to print directories covering more than their immediate local area. Switchboard broke down those information barriers and gave individuals access to free, nationwide listing information....More

White Pages:

Find a Person - " All of the residential white pages listings are public information obtained from local telephone records for published telephone listings. These listings can range from three months to six months old and are updated every three months. Since erroneous information comes from local companies, errors must be corrected through those local companies..."

Yellow Pages:
Find a Business - "Yellow Page listings (searches by category or name) are obtained from InfoSpace and are updated monthly."

Privacy
" AT&T does not sell to any third parties the contents of the AnyWho directories for purposes such as marketing. The contents of these directories are all publicly accessible, however, either through our service provided at AnyWho.com or which we also provide through some third party web sites." More about privacy

Infobel To seek the phone's numbers subscribers on the most part of the world.

" Infobel.com: the white, yellow and business pages on the internet.

" Infobel.com is able to respond in a few milliseconds to thousands of simultaneous requests, and is now the reference in white and yellow pages search; it gives access to the national sites more specifically dedicated to their own market. "