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Area code 815 serves northern Illinois except for the Chicago metro area. It includes the cities of Rockford, Joliet, and DeKalb. It has a single overlay ( 779 ) that serves the same area.
1 lip 2024 · 815 Area Code located in Illinois, including 196 cities, 26 counties, 1 time zone, map, Census demographics, and 782 active prefixes.
Location: Illinois (much of northern Illinois outside Chicago and its immediate surrounding suburbs: Rockford and its suburbs, Belvidere, La Salle, Peru, DeKalb, Sycamore, Freeport, Dixon, Sterling, Rock Falls, Ottawa, Morris, Princeton, Mendota, Rochelle, Sandwich, Streator, Pontiac, Kankakee, and some outlying Chicago suburbs such as Harvard ...
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 code 815 was overlaid with area code 779 in 2007. 847/224: North and northwest suburbs of Chicago including all of Lake County, part of McHenry County, northern Cook County, and northeastern Kane County.
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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.
