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The Northwestern Suburbs is a region in Chicagoland, primary located in northwestern Cook, southern Lake and northern DuPage County, primarily centered along the Union Pacific Northwest Metra Line, though encompassing areas well beyond the rail line. Map. Directions.
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.
North Chicago is a city in Lake County, Illinois, United States, and a suburb of the Chicago metropolitan area. The population was 30,759 at the 2020 census making it the third-most populous city by population in the county, after Waukegan and Mundelein. Map.
The Chicago metropolitan area, also referred to as the Greater Chicago Area and Chicagoland, is the largest metropolitan statistical area in the U.S. state of Illinois, and the Midwest, containing the City of Chicago along with its surrounding suburbs and satellite cities.
Chicago, IL has the following Exchanges (NXX) List of all area codes in Chicago, IL. Chicago, IL area code map, list, and phone lookup.
* 312: Chicago, the central city area including the Chicago Loop and the Near North Side. * 618: Southern Illinois, including Carbondale and most of the Metro East region of St. Louis suburbs in 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.
