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Find out the planned dates and details of new area codes in the North American Numbering Plan (NANP) for relief of central office code exhaustion. See the list of affected NPAs, jurisdictions, projected exhaust dates and effective dates.
Find the area code for any location in North America, including the United States, Canada, and some Caribbean countries. The web page shows the numerical order, territory, date, and notes for each area code, including the overlay and split history.
Learn about the North American Numbering Plan (NANP), a system of ten-digit telephone numbers in the US and Canada. Find out how the NANP is expanded to accommodate future needs, and see examples of proposed and current formats.
An area code overlay is a numbering plan area that has multiple area codes assigned to increase the number of available telephone numbers. The web page lists the overlay complexes in North America, including the base area code and the overlaid area code, with location and notes.
Find the area codes for different regions or countries in North America, including the original NANP and other autonomous plans. Learn how to format and dial telephone numbers in Mexico, Greenland, and Saint Pierre and Miquelon.
The North American Numbering Plan (NANP) is a telephone numbering system for twenty-five regions in twenty countries, mainly in North America and the Caribbean. It uses the country code 1 and divides the territories into numbering plan areas (NPAs) with three-digit area codes.
Learn about the history, service area, and usage of telephone area codes 610, 484, and 835 in Pennsylvania and Delaware. Find out which counties, municipalities, and exchanges are served by these codes and how they differ from other NANP codes.
Learn about the types, structures and formats of telephone numbers and area codes in different regions and countries. Compare the closed and open numbering plans, the E.164 standard and the North American Numbering Plan.