What is area code? - Definition from WhatIs.com

In the North American telephone system, an area code is a three-digit code delineating a "toll" area in the United States, Canada, and Mexico. Area codes are distributed according to the North American Number Plan (NANP). The area code is also referred to as a Number Plan Area or NPA.

This was last updated in April 2005
Posted by: Margaret Rouse

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