SEARCH THE WEB FOR A PHONE NUMBER

Anywho.com
Allows you to search for names or businesses even if you do not know the exact spelling or location. It also offers toll-free numbers and a reverse lookup in those instances where you know the number, but not the locale.

Switchboard.com
An all-in-one person and business search service. You can scour for phone numbers, business addresses or get directions to a location with mapping services.