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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 .
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.
This is a list of area codes in the U.S. state of Florida. When the original North American area codes were introduced for a nationwide telephone numbering plan in 1947, the entire state was a single numbering plan area (NPA) with area code 305.
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.
In the group of original North American area codes, established in 1947, all of the Chicago metropolitan area was part of numbering plan area 312, the rest of northern Illinois was 815, central Illinois was 217, and southern Illinois was 618.
Clickable map of Colorado area codes in blue (with bordering states). Area code 719 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Colorado.
Area codes 718, 347, and 929 are telephone area codes in the North American Numbering Plan (NANP) for the New York City boroughs of the Bronx, Brooklyn, Queens, and Staten Island, as well as the Marble Hill section of Manhattan.
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.
Georgia is served by ten area codes. The newest area code, 943, went into service in March 2022 as another area code for the Atlanta area. Current projections suggest that both 229 and 912 will require further relief before 2030. List of area codes
This is a list of telephone area codes of Pennsylvania. In 1947, the American Telephone and Telegraph Company divided Pennsylvania into four numbering plan areas (NPAs) and assigned distinct area codes for each.