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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). NPAs with 9 in the second position are reserved for future format expansion.
The map to the right is now clickable; click on an area code to go to the page for that code, or use the text links below. Map of texas in blue showing area codes, with border codes Pages in category "Area codes in Texas"
Numbering plan areas in California (blue) and border states. This map is clickable; click on any region shown to visit the page for those area codes. In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes.
N=, S=, E= and W= are the area codes (or oceans) that border this area code in those compass directions. Optional Parameters: S1=XX for the first nearby state, province or Caribbean country to this area code, where XX is the two letter state/province abbreviation or the full name of the country. S2=XX for the second nearby state,...
Clickable map of Arizona area codes in blue (and border states) The U.S. state of Arizona is served by five telephone area codes in three numbering plan areas: Area codes 602, 480, and 623 serve the Phoenix metropolitan area. The three area codes were recombined in 2023 into an overlay complex after a 1999 split:
This is a list of the area codes in the state of Illinois and its numbering plan areas in the North American Numbering Plan.. All NPAs within Illinois. 217/447: Central Illinois, including the region running west from the Illinois-Indiana border through Danville, Effingham, Champaign–Urbana, Decatur, Springfield, Quincy until Illinois' western border with Missouri and Iowa.
It was overlaid with area code 924 in 2024. It is the first area code overlay complex in Minnesota. The region was directly bordered by 612 (to the north) until that area code was divided in the 1990s. The western half of 507 bordered area code 320 starting in 1996, and then later came to border also area code 651 (1998) and area code 952 (2000).
This URI provides access, through content negotiation, either to the HTML wiki page, or to a RDF description of the feature, using elements of the GeoNames ontology. [6] This ontology describes the GeoNames features properties using the Web Ontology Language , the feature classes and codes being described in the SKOS language.