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872: City of Chicago, overlaying area codes 312 and 773. History. In the group of original North American area codes, established in 1947, all of the Chicago metropolitan area was part of numbering plan area 312, the rest of northern Illinois was 815, central Illinois was 217, and southern Illinois was 618.
Chicago, IL has the following Exchanges (NXX) List of all area codes in Chicago, IL. Chicago, IL area code map, list, and phone lookup.
Prefixes – 1708 codes. Area codes in Chicago, Illinois. Get the area’s map, current time, and prefixes for Chicago.
Lookup area code information for CHICAGO, IL. Get the NPA NXX (area code and prefix) as well as much more data for CHICAGO, IL.
Area code 312 is a telephone area code in the North American Numbering Plan for the city of Chicago, including downtown, the Chicago Loop, and its immediate environs. The numbering plan area is completely surrounded by area code 773, which serves the rest of Chicago.
Chicago, IL Area Codes are. 312, 773 and 872. Chicago, IL originally utilized area code 312 which was one of the original area codes assigned to Illinois in 1947. In 1996 area code 312 was split to form area code 773.
Find the local area code for Chicago, Illinois. Our complete calling resource guide instantly gives you the the Chicago area code and local time to help you make your long distance call to Chicago, Illinois.
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