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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.
It has the following active area codes: List of all area codes in Chicago, IL. Chicago, IL area code map, list, and phone lookup.
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 in Chicago, Illinois. Get the area’s map, current time, and prefixes for Chicago.
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.
Area Code 312 is located in Illinois. It covers 16 cities , including Chicago, Cicero, Schaumburg, Glenview, and Buffalo Grove. It also covers 3 counties , including Cook County, Lake County, Dupage County.
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.
773: Chicago, covers most of the geographical area of Chicago except the downtown Chicago Loop, which is in area code 312. 815/779 : Northern Illinois outside of the immediate Chicago area including Joliet , Kankakee , LaSalle , DeKalb , and Rockford .
Area code 773 serves Chicago, Illinois, outside the Loop and the innermost neighborhoods. Originally, all of Chicago and its suburbs used area code 312. In 1989, area code 708 was created for the suburbs, leaving the city in area code 312.
Area code 312 covers the central city of Chicago, Illinois, and includes the Chicago loop extending up to the near north side. The first zip codes, 60601-60607, are assigned for the loop. 60610 and 60611 serve the Gold Coast and Streeterville.