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The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are
CodeTerritory Or UseDate200not in use; available for non-geographic ...easily recognizable code (ERC)New Jersey ( Bergen County and Hudson ...19471947Southwestern Connecticut ( Bridgeport, ...1947The North American Numbering Plan (NANP) is a telephone numbering plan for twenty-five regions in twenty countries, primarily in North America and the Caribbean. This group is historically known as World Zone 1 and has the telephone country code 1 .
This is a list of North American telephone area codes in effect for the North American Numbering Plan (NANP). The area to which an area code is officially assigned is known as a Numbering Plan Area (NPA).
This site provides information about the North American Numbering Plan (NANP) and its administration. The NANP is the numbering plan for the Public Switched Telephone Network for Canada, the US and its territories, and some Caribbean countries.
The North American Numbering Plan is used in 25 countries, including the United States and several overseas territories and several Caribbean countries. All countries that are part of the NANP use the same country code for telephone numbers: +1.
Area code maps are available for the U.S. states and Canada. View US Area Code Maps. The Canadian Area Code Map is maintained by the Canadian Numbering Administrator and is available at their site. The Country/Territory Map provides a listing of NPAs used by NANP-member countries, including Bermuda, Caribbean nations and US territories that ...
Code Plan. Earlier the codes were designed in the form of N-Y-X, in which N is a number between 2-9, Y is either 0 or 1 and X represents any number from 1-9 (if Y is 0) or any number between 2-9 (if Y is 1).
