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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.
The state of California was divided into three numbering plan areas (NPAs) with distinct area codes: 213, 415, and 916, for the southern, central, and northern parts of the state, respectively. As of July 2023, California has 38 active area codes.
Subcategories. This category has the following 4 subcategories, out of 4 total. Area codes in the United States by state or territory (50 C) Area codes in Washington, D.C. (1 P)
List of Washington (state) area codes. The U.S. state of Washington has six telephone area codes. The state initially used a single area code ( 206) until it was divided in 1957 with the creation of area code 509 to serve Eastern Washington. In 1995, 206 was split again to serve just the Puget Sound region after area code 360 was created for ...
List of New York area codes. New York area codes (blue area). The North American Numbering Plan Administration has divided the state of New York into twelve numbering plan areas (NPAs) with a total of 19 area codes. Syracuse, Utica, Watertown, and north central New York; overlaid by 680.
Numbering plan areas and area codes of Texas (tan). This is a list of area codes in the U.S. state of Texas. The date of establishment of each area code is indicated in parentheses: 210: San Antonio area; overlays with 726 (November 1, 1992) 214: Dallas area, overlays with 469, 972, and 945 (October 1947)
Lists of North American area codes. The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries.
List of Missouri area codes. This is a list of telephone area codes in the state of Missouri. The area codes are allocated within the North American Numbering Plan (NANP) . The two original area codes for Missouri in 1947 were 314 and 816.
List of Arkansas area codes. The state of Arkansas is served by four telephone area codes: 479, 501, 870, and 327. In 1947, when the North American Numbering Plan was first implemented, the entire state of Arkansas was assigned the area code 501.
List of Massachusetts area codes. Numbering plan areas and area codes since May 2001. September 1997 – May 2001. July 1988 – September 1997. October 1947 – July 1988. Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP), [1] organized as ...