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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.
Learn about the geographic and non-geographic area codes used in the North American Numbering Plan (NANP), which divides the territories of its members into numbering plan areas (NPAs). See the numerical order, date, territory or use, and notes of each area code.
Find out the telephone area codes of Pennsylvania and their locations on an interactive map. Learn about the history and current status of area code splits and overlays in the state.
Learn about the history and development of the North American Numbering Plan (NANP), which was established by AT&T in 1947 to enable direct distance dialing across the continent. The article covers the initial numbering plan areas and area codes, the expansion and changes over time, and the technical specifications and requirements.
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 map of the telephone area codes 814 and 582 in Pennsylvania. Find out how they were created, when they started and which cities and counties they cover.
Learn about the history and service area of the three telephone area codes for Philadelphia and its suburbs in Pennsylvania. Find out how area code 445 was activated in 2018 as an overlay code on 215/267.