what erea code is 224
Area code 224 is an area code that covers Northeastern Illinois, mostly Chicago's Northern suburb.Area code 224 overlays the area code of 847. Illinois has area codes of 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 872.llinois has area codes of 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 872.