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Area CodesArea Codes > By Area Code | By Country | By LocationTelephone area codes are three-digit numbers that are assigned to specific locations or usages. There are nearly 8 million numbers available in each area code. Each state in the USA, each province in Canada, and certain island countries and territories (primarily in the Caribbean) are assigned one or more area codes, based on phone service requirements. Other area codes are dedicated to toll-free service and specialized telephone services. When making long distance phone calls between cities with differing area codes, callers must dial one ("1") plus an area code before dialing the seven-digit phone number.Originally, most area codes were assigned to geographically distinct areas. Over time, some areas have allocated most of their available phone numbers due to population growth and the unanticipated use of separate phone numbers for fax machines and cell phones. Area code splits or overlays have occurred in such areas. An area code split occurs when an existing area is divided into two parts, one having a new area code and the other continuing to use the old area code. Alternatively, a new area code may overlay an area already assigned to another area code. In the latter case, existing phone numbers need not be changed, but callers within the overlay area must include the area code even when dialing local phone numbers. Area-Codes.org features a convenient list of active Area Codes, sorted numerically, along with their locations or usages, countries, and time zones. You can also search for area codes using two additional lookup tables, listing area codes sorted by country and location. For more information about telephone area codes, please consult your local telephone directory and this article from the Federal Communications Commission website, entitled Area Codes: Frequently Asked Questions and Fact Sheet.
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