Area Codes in Illinois

Illinois is located in US. 13 area codes are used in IL by 997 cities.

IL Area Codes

IL NPA
Area Code 217
Area Code 224
Area Code 309
Area Code 312
Area Code 331
Area Code 618
Area Code 630
Area Code 708
Area Code 773
Area Code 779
Area Code 815
Area Code 847
Area Code 872

There are 149 phone companies in Illinois, US.