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Chicago, IL has the following Exchanges (NXX) List of all area codes in Chicago, IL. Chicago, IL area code map, list, and phone lookup.
Area codes 847 (northern suburbs) and 630 (western suburbs) were created from a split of suburban area code 708 in 1996. Shortly after in 1996, area code 773 was created for the residential parts of the city of Chicago, while downtown kept area code 312.
Lookup area code information for CHICAGO, IL. Get the NPA NXX (area code and prefix) as well as much more data for CHICAGO, IL.
Illinois currently utilizes 15 area codes. When first established by AT&T and the Bell System in 1947, 217 covered central Illinois, 312 covered the Chicago metropolitan area, 618 covered southern Illinois including East St. Louis and Carbondale, and 815 covered northern Illinois except Chicago
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.
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.
Lookup area code 312 details: major cities and timezone. View the 312 area code map in Illinois. Find the name of any phone number in area code 312.
