Addresses.com
The largest e-mail address database and directory on the web. Varied method of performing searches using phone numbers, e-mail and home addresses. Also able to search for businesses, zip codes, area codes, schools and even persons.

Airline Toll-Free Numbers and Websites
A worldwide list.

AnyWho
Free lookup site by AT&T (does not use billing records of it's customers) for locating a person or business using White Pages, or for finding a business by type, using Yellow pages. All residential listings were obtained from public phone directories and are updated every 3 months, while business White and Yellow Page listings were obtained from InfoSpace and are updated monthly.

AnyWho Find People
An easy search form for phone, address, or E-mail. Does a "begins with" search that others won't.

Area Code Lookup
Know the U.S. city? Find the area code. Works in reverse, too. From Melissa Data.

Argali White & Yellow
Argali White & Yellow searches multiple telephone (and related) directories at once. Many different search types are supported: people, business, toll-free, reverse search (by phone or address), search for area and zip codes. Argali also searches for maps, email addresses and weather conditions and forecast. Search results can be sorted by name, address, street, city, state, zip code or phone number and can also be saved on disk in various formats (plain text, csv/excel, or html). The program automatically remembers your last twenty searches. Aggregates info. from more than 25 sources/sites (Yahoo, InfoSpace and AnyWho).

BigBook Yellow Pages
An easy-to-search directory of U.S. businesses by category. Try the detailed search for the option of sorting by name or city.

Database America
U.S. residential listings, and a reverse directory.

Federal Citizen Information Center Phone Contacts
Lists main number for and links to many government agencies and their directories, plus has a section with congressional phone numbers.

Global Yellow Pages
Links to telephone directories around the world -- residential and business.

InfoSpace International
Residential and business phone numbers from many countries, particularly in Europe.

InfoSpace Reverse Lookup
Just enter a number, address, area code or E-mail address to find listings. Reverse listings are mostly U.S. only. The best part: Look for "find neighbors of...." The result links you to neighborhood map, directions, businesses nearby, and neighbors.

National ZIP Code Address Server
Don't know the ZIP code? Just enter the address and this site will produce it.

PeopleSearch.net
Includes a reverse search by phone number, E-mail, address.

Reporter's Desktop
A fabulous one-stop shop for the best phone finders and search engines. Compiled by Duff Wilson of The Seattle Times.

Switchboard telephone search
Search 106 million listed residential telephone numbers in the U.S., by name. (Also 11 million business listings.)

World Email Directory
Worldwide email databases. Search by name, city, country or business. Want to be found? Add your information.