White Pages directory listings can be found on the websites WhitePages.com and AnyWho.com. The searches on these sites require a last name and ZIP code, with the option of entering a first name as well.
The basic search function on WhitePages.com is free, although the site offers reverse searches for a fee.
AnyWho allows searches by address and phone number. The site also offers a reverse lookup and a function to locate area codes. The AT&T Directory Assistance page offers a White Pages search of residential numbers in conjunction with AnyWho.
Both sites also offer Yellow Pages listings for business numbers.