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Area codes 815 and 779 are telephone area codes in the North American Numbering Plan (NANP) for most of northern Illinois outside the Quad Cities areas. It also serves the Joliet area and some of Chicago’s western and northwestern suburbs. 815 was one of the four original Illinois area codes set up in 1947.
- List of Illinois area codes
Area code 815 was overlaid with area code 779 in 2007....
- Area codes 816 and 975
Area codes 816 and 975 are telephone area codes in the North...
- Area code 815
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- List of Illinois area codes
This is a list of North American telephone area codes in effect for the North American Numbering Plan (NANP). The area to which an area code is officially assigned is known as a Numbering Plan Area (NPA).
The original configuration of the North American Numbering Plan assigned eighty-six area codes in October 1947, one each to every numbering plan area. The territories of the United States, which included Alaska, and Hawaii, did not receive area codes at first, nor did the territories of Canada or Newfoundland and Labrador, which was a British ...
Area code 815 is located in Illinois. Get the area’s map, cities covered, current time, prefixes, and dialing instructions.
