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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 prefixed to each local telephone number having seven digits.
After the remaining valid area codes were used up by expansion, in 1995 the rapid growth in the need for more area codes forced the NANPA to allow the digits 2 through 8 to be used as a middle digit in new area code assignments, with 9 being reserved as a last resort for potential future expansion. At the same time, local exchanges were allowed ...
Area codes 336 and 743 are NANPA area codes that cover most of north-central and northwestern North Carolina, including the Piedmont Triad region and portions of the northern Foothills and northern Mountains. Area code 336 was split off from area code 910 on December 15, 1997. The 743 overlay area code officially entered service on October 24 ...
An area code overlay is a numbering plan area (NPA) in the North American Numbering Plan (NANP) that has multiple area codes assigned. Overlay complexes are used to add central office prefixes in an NPA to increase the number of available telephone numbers .
This is a list of future area codes in the North American Numbering Plan (NANP) that are in the planning stages for relief of central office code exhaustion in the given numbering plan areas (NPAs). The dates are subject to change during implementation as published in the official NANP Administrator Planning Letters.
Area codes 213, 323, and 738 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. They are assigned in an overlay complex to a numbering plan area (NPA) that comprises, roughly, the area of downtown Los Angeles City , as well as several southeast Los Angeles County cities, such as Bell and ...
To use this template, use {{NANPA area code map|Map=ST}} where ST is the 2-character US state abbreviation, e.g. CA, DC, NY, VA etc. This generates a link to the appropriate area code map at the NANPA website. Example: {{NANPA area code map|Map=CA}} NANPA area code map of California
Area codes 805 and 820 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California. The numbering plan area (NPA) includes most or all of the counties of San Luis Obispo , Santa Barbara , Ventura , and the southernmost portions of Monterey County . 805 was split from area code 213 in 1957, and area code ...