List of North American Numbering Plan area codes

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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).

An area code is part of a telephone number in the United States, Canada, and the Caribbean. It is the part of the telephone number after the county code. For example, in the number 1-562-555-5555, the 1 is the country code (for the United States), and 562 is the area code. An area code is typically assigned to a state, city or region. The area codes range from 200 to 999.

Sometimes, an additional area code will be added to an area. This is called an overlay.