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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. A numbering plan area with multiple area codes is called an overlay. Area codes are also assigned for non-geographic purposes.
In 2016, area code 614 was overlaid with 380 in the Columbus/Central Ohio area for the same reason. In 2020, 326 was added as an all services overlay for 937. Area code 283 was added as an overlay for 513 on April 28, 2023. Area code 436 went into service on March 1, 2024, as an overlay of 440. References
Area codes in the United States. For convenience, all U.S. area codes should be included in this category. This includes all area codes that can also be found in the subcategories. This category lists the telephone area codes in the United States .
The area code is prefixed to each telephone number issued in its service area. Other national telecommunication authorities use various formats and dialing rules for area codes. The size of area code prefixes may either be fixed or variable.
Area codes 614 and 380. Coordinates: 40°N 83°W. The regions shown in blue are in Ohio. Area codes 614 and 380 are telephone area codes in the North American Numbering Plan (NANP) for all or part of four counties in central Ohio, surrounding and including the state capital of Columbus.
As of July 2023, California has 38 active area codes. Area code. Service area. Notes. 209. Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra Nevada range. Split from 415 on October 26, 1957; split off 559 on November 14, 1998; overlaid with 350 on November 28, 2022. 213.
Area codes 713, 281, 832, and 346 are telephone area codes in the North American Numbering Plan (NANP) forming an overlay complex for Houston, Texas and its environs. Area code 713 is one of the original four area codes established for Texas in 1947.
Area codes 740 and 220. Coordinates: 39°0′0″N 82°30′0″W. The regions shown in blue are in Ohio. Area codes 740 and 220 are telephone area codes in the North American Numbering Plan (NANP) for the southeastern and central parts of Ohio. The numbering plan area (NPA) includes the cities of Athens, Belpre, Cadiz, Chillicothe, Circleville ...
The original configuration of the North American Numbering Plan assigned eighty-six area codes in October 1947, one each to every numbering plan area. The territories of the United States, which included Alaska, and Hawaii, did not receive area codes at first, nor did the territories of Canada or Newfoundland and Labrador, which was a British ...
Area codes 602, 480, and 623 are telephone area codes in the North American Numbering Plan (NANP) for most of the Phoenix metropolitan area in the U.S. state of Arizona. Area code 602 is the oldest area code in Arizona and was assigned in 1947 for the entire state.