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Illinois area codes

Illinois uses 16 area codes. Open any of them for the map, carriers and prefixes.

All area codes in Illinois

Main city and overlays for each code.

AREA CODE 217 Springfield Overlay with 447 AREA CODE 224 Arlington Heights Overlay with 847 AREA CODE 309 Peoria Overlay with 861 AREA CODE 312 Chicago Overlay with 872 AREA CODE 331 Aurora Overlay with 630 AREA CODE 447 Danville Overlay with 217 AREA CODE 464 Tinley Park Overlay with 708 AREA CODE 618 Collinsville Overlay with 730 AREA CODE 630 La Grange Overlay with 331 AREA CODE 708 La Grange Overlay with 464 AREA CODE 730 Centralia Overlay with 618 AREA CODE 773 Chicago Overlay with 872 AREA CODE 779 Rockford Overlay with 815 AREA CODE 815 Rockford Overlay with 779 AREA CODE 847 Northbrook Overlay with 224 AREA CODE 872 Chicago Overlay with 312

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