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UCSD Department of Computer Science and Engineering

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

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

State information resource links to state homepage, symbols, flags, maps, constitutions, representitives, songs, birds, flowers, trees

Conversion and Calculation Center home page that contains links to our measurement conversion, currency exchange rate, world time zone, reference information, and other pages.

Find more information about country codes, phone codes, and ISO country codes. We

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

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

The Most Complete USA Cell Phone Number List Database. Perfect for Text Marketing. Includes Area Code, Prefix, Carrier, SMS TXT Messaging Domain

The Library of Congress. The Library of Congress is the nation