Any Who AT&T Yellow Pages, White Pages, Reverse Lookup.
Superpages.com ® This site includes a Search by Phone Number (Reverse Lookup) under Advanced Search.
Yellowpages.com ™ Search Bell's Yellowpages.com business guide by company name or business type; includes maps of US cities.
Switchboard ® “Switchboard is committed to delivering highly qualified, Web generated leads to businesses of all sizes.” And it is FREE! And you can register if you want to be in the database (if you are not already). The first and last names are in different fields; so you can limit your searches to the last name only.
Zip Code ™ Lookup and Address Information (USPS) From the US Postal Service.