| Telephone | Area Codes | Zip Codes |
Below are websites that have multiple search capabilities:
| 411 Locate |
| Addresses.com |
| E-Mail Search This omnibus site permits simultaneous searching of five e-mail address databases: Yahoo, Switchboard, WhoWhere, InfoSpace, and Internet Address Finder. |
| Internet Address Finder This site claims to have more than 6.7M listings; it appears to be both comprehensive and reliable. |
| The Ultimate Email Directory |
| AnyWho Sponsored by the American Telephone and Telegraph Company (AT&T), this site offers telephone, e-mail, home page, FAX number, and toll-free number searching. Reverse look-up is an added feature. |
| Peoplefinders |
| The Ultimate White Pages This omnibus site permits simultaneous searching of six directory databases: Infospace, Dogpile, Whitepages, Yahoo People, WhoWhere, and Switchboard. Each search opens up a new browser window, so be careful to look at all of the results pages. |
| Telephone Directories on the Web is an index to online telephone books, claiming more than 400 links to yellow pages, white pages, business directories, e-mail listings, and fax listings from 170 countries around the world. |
| USA People Search |
| Yellow.com |
In addition to the telephone directories under Telephone above, consult:
| Area Code Listing By Number Includes a link to NANPA, the North American Numbering Plan, with maps and other numbering data. |
| Verizon's Area Code Lookup |
| United States Postal Service Who else? |