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Illinois Area Codes

Illinois is serviced by various internet service providers offering different area codes. The most common area codes used in the state are 312, 630, 708, and 847. Depending on where you live in Illinois, your ISP may offer services using one or more of these area codes. Different ISPs provide varying levels of speed and reliability depending on the coverage areas they serve within each code range. Hence, it’s essential to research what options are available for your specific location before signing up for an internet plan.

Illinois217Springfield, Champaign, Charleston
CST
224Elgin, Algonquin, Arlington Heights
CST
309Peoria, Bloomington, East Moline
CST
312Chicago
CST
331Aurora, Addison, Bartlett
CST
618Belleville, Alton, Carbondale
CST
630Aurora, Addison, Bartlett
CST
708Cicero, Bellwood, Berwyn
CST
773Chicago
CST
779Rockford, Belvidere, Crystal Lake
CST
815Rockford, Belvidere, Crystal Lake
CST
847Elgin, Algonquin, Arlington Heights
CST
872Chicago
CST