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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 ...
Get information and map of 815 area code, Illinois which shows the counties covered in it. Also get the county list which belongs to area code 815.
Area codes 815 and 779 are telephone area codes in the North American Numbering Plan (NANP) for most of northern Illinois outside the Quad Cities areas. It also serves the Joliet area and some of Chicago’s western and northwestern suburbs. 815 was one of the four original Illinois area codes set up in 1947.
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.
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.
