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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.
The red numbering plan area has area code 702/725; the blue area has area code 775, also in Nevada. All other area codes are in other states. Area codes 702 and 725 are telephone area codes in the North American Numbering Plan (NANP) for Clark County , including Las Vegas , in the U.S. state of Nevada .
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 310 and 424. Coordinates: 34.0383°N 118.5108°W. Numbering plan areas in California (blue) and border states. Area codes 310 and 424 are shown in red. Area codes 310 and 424 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of California.
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 404 is a telephone area code in the North American Numbering Plan (NANP) for Atlanta, Georgia and its closest suburbs. This comprises roughly the area encircled by Interstate 285 . It is an enclave area code, surrounded by area code 770 , which serves most of Atlanta's suburbs.
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 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 519, 226, 548, and 382 are overlay telephone area codes in the North American Numbering Plan (NANP) for most of southwestern Ontario. Area code 519 was the initial code of the numbering plan area (NPA). It was created in 1953 from the western portion of area code 416 and the southwestern portion of 613.