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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.
World Area Codes. The Bureau of Transportation Statistics (BTS), as part of the United States Department of Transportation (US DOT), maintains a list of U.S. state and country codes, [1] named World Area Codes (WAC).
Area codes 916 and 279. Coordinates: 38.6°N 121.5°W. Numbering plan areas in California (blue) and border states. Area code 916 is shown in red. Area codes 916 and 279 are California telephone area codes that serve Sacramento, the state capital, and most of its suburbs.
Area codes 909 and 840 are telephone area codes in the North American Numbering Plan for the far-eastern part of Los Angeles County and southwestern San Bernardino County in the U.S. state of California. Area code 909 was created on November 14, 1992, in an area code split of 909, and 840 was added to the numbering plan area to form an overlay ...
Area codes 920 and 274 are telephone area codes in the North American Numbering Plan (NANP) for a large area of eastern Wisconsin. Area code 920 was created on July 26, 1997, in a split of area code 414, one of the original North American area codes of 1947. 274 was added to the same numbering plan area (NPA) on May 5, 2023 to create an area ...
Numbering plan areas and area codes of Texas with numbering plan area 214/469/972/945 highlighted. Area codes 214, 469, 972, and 945 are telephone area codes in the North American Numbering Plan (NANP) for Dallas, Texas and most of the eastern portion of the Dallas–Fort Worth metroplex.
Area code 970. Coordinates: 39°N 106°W. Clickable map of Colorado area codes in blue (with bordering states). [1] Area code 970 is a telephone area code in the North American Numbering Plan (NANP) for most of the western and northern parts of the U.S. state of Colorado.
Area code 941 is a telephone area code in the North American Numbering Plan for a west-central coastal portion of the U.S. state of Florida. Introduced on March 3, 1996, [1] the numbering plan area includes the counties of Manatee, Sarasota, and Charlotte, areas along the Sun Coast of southwestern Florida, USA.
Area codes 708 and 464 are telephone area codes in the North American Numbering Plan (NANP) for the southern and western suburbs of Chicago in the U.S. state of Illinois. The numbering plan area comprises most of western and southern Cook County, and eastern and southern Will County .
Area codes of Alabama. The U.S. state of Alabama is served by six area codes. When the North American Numbering Plan was first defined in 1947, Alabama was a single numbering plan area (NPA), with area code 205. This configuration existed until 1995 when area code 334 was added for the southeastern part of the state.