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Area code 503 was one of the original North American area codes of 1947, assigned to the entire state until 1995, when its extent was reduced to the northwestern corner. Area code 971 was assigned to the service area in stages, completed in 2008, to form an overlay in the area with ten-digit dialing.
971: An overlay of area code 503. Until 2008, 971 was a concentrated overlay, meaning it was only present in some parts of the 503 area. Today it is a standard overlay. 458: An overlay of area code 541. Under the original North American Numbering Plan of 1947, area code 503 covered all of Oregon. Area code 541 was split off in 1995, the 971 ...
A numbering plan area with multiple area codes is called an overlay. Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC).
Area code 603 is the sole area code for the U.S. state of New Hampshire in the North American Numbering Plan (NANP). It was created as one of the original 86 numbering plan areas in October 1947. It was created as one of the original 86 numbering plan areas in October 1947.
Area code: 503: FIPS code: 41-24550 [4] GNIS feature ID: 2410482 [2] Website: www.fallscityoregon.gov: Falls City is a city in Polk County, Oregon, United States.
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Area code: 503: FIPS code: 41-11150 [4] GNIS feature ID: 2409986 [2] Website: www.ci.carlton.or.us: Carlton is a city in Yamhill County, Oregon, United States. The ...
Area code: 503: FIPS code: 41-14750 [5] GNIS feature ID: 2410201 [3] Website: www.columbia-city.org: Columbia City is a city in Columbia County, Oregon, United States.