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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.
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.
Area code 719. Clickable map of Colorado area codes in blue (with bordering states). [1] Area code 719 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Colorado.
Area codes 904 and 324. Area codes 904 and 324 are telephone area code in the North American Numbering Plan for most of the First Coast (northeast) region of the U.S. state of Florida. The numbering plan ara comprises most of the metropolitan area of Jacksonville.
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 codes 305, 786, and 645. Area codes 305, 786, and 645 are telephone area codes in the North American Numbering Plan (NANP) for Miami, Florida, Miami-Dade County, and the part of Monroe County in the Florida Keys in the United States.
Area codes 213 and 323. Coordinates: 34.0552°N 118.2568°W. Numbering plan areas in California (blue) and border states. Area codes 213 and 323 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California.
Clickable map of Colorado area codes in blue (with bordering states). The U.S. state of Colorado is served by five telephone area codes of the North American Numbering Plan (NANP). Area code 303 is the original area code assigned to the entire state when the first nationwide telephone numbering plan was created in 1947.
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 code 312 is a telephone area code in the North American Numbering Plan for the city of Chicago, including downtown, the Chicago Loop, and its immediate environs. The numbering plan area is completely surrounded by area code 773 , which serves the rest of Chicago.