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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 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). An area code is part of a telephone number in the United States, Canada, and the Caribbean.
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 ...
- 217, 312, 618, 815
- 216, 419, 513, 614
- 212, 315, 518, 716, 914
- 215, 412, 717, 814
815 is an area code located in the state of Illinois, US. The largest city it serves is Rockford. Location, time zone and map of the 815 area code. Local time. 5:24:59 PM, Friday 24, May 2024 CDT. Time difference to GMT/UTC. Daylight Saving Time 2024 (Summer Time) DST starts on Sunday 10 March 2024, 02:00. DST ends on Sunday 03 November 2024, 02:00
Area codes 815 and 779 are telephone area codes for most of northern Illinois outside the Chicago and Quad Cities areas. It also serves the Joliet area and some of Chicago’s western and northwestern exurbs. 815 was one of the four original Illinois area codes set up in 1947.
