| Any Who Directories by AT&T Labs - Includes toll-free, people, business, and reverse look-up. |
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| Area Code Maps - Maps for U.S. and Canada. PDF format for printing. Maintained by North American Numbering Plan. |
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| Area Decoder - Enter an area code to find a location. Site also provides general communication information. |
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| Country & City Codes - International dialing codes. Interactive form offers great variety. |
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| SuperPages.com - Will search by location and distance between locations. |
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| Telephone Directories of the Web - Information and services for more than 184 countries.Multilingual searches and lookup by street address very helpful. |
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