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Area code lookup for all US cities or use the area codes locator to find which city a phone area code belongs to.

900 numbers and websites developed and maintained by MMI World Communications.

The AmeriCom Long Distance Area Code Service. Quality Cheap Long Distance service with no minimum usage requirements and 100 free minutes. Also offering stand alone toll-free service and 800 numbers.

Telephone search engine that returns the city, state, and country of any phone number in the world.

AreaCode.org lists US and Canada telephone area codes for reverse area code lookup. Find area code list, area code maps, and cities within an area code.

UCSD Department of Computer Science and Engineering

Locator for telephone area codes in the USA, Canada and some Caribbean Islands; lookup cities in an area code and viceversa - detailed information on all codes including map and time zone/curent time

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Find the international dialing code or time zone for any country. Online tool will instantly show you ALL telephone prefixes needed to call from one area code to another. Add the tool to your own site for quick access.

Area Code Finder - Free service to look up any U.S. area code!

Telephone Area Codes and Area Code Splits. Information about North American Numbering Plan (NANP).