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- The city of Chicago is in the state of Illinois. It has the following active area codes: 217
www.wirefly.com/area-codes/illinois/chicagoChicago, IL Area Codes: List, Map, and Phone Lookup | Wirefly
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312: Chicago, the central city area including the Chicago Loop and the Near North Side. 618/730: Southern Illinois, including Carbondale and most of the Metro East region of St. Louis suburbs in Illinois.
Chicago, IL has the following Exchanges (NXX) List of all area codes in Chicago, IL. Chicago, IL area code map, list, and phone lookup.
Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits. A numbering plan area with multiple area codes is called an overlay. Area codes are also assigned for non-geographic purposes.
- 368, 403, 568, 587, 780, 825
- 204, 431, 584
- 236, 250, 257, 604, 672, 778
- 428, 506
Prefixes – 1708 codes. Area codes in Chicago, Illinois. Get the area’s map, current time, and prefixes for Chicago.
As a result, the city of Chicago was divided into two area codes, 312 and 773. Rather than divide the city by a north–south area code, the central business district retained the 312 area code, while the remainder of the city took the new 773 code. In 2002, the 847 area code was supplemented with the overlay area code 224.
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 codes 708 and 464 are telephone area codes in the North American Numbering Plan (NANP) for the southern and western suburbs of Chicago in the U.S. state of Illinois. The numbering plan area comprises most of western and southern Cook County, and eastern and southern Will County.
