Information for Area Code 312

312 Area Code belongs to the Illinois (IL) State.

Other cities in the 312 Area Code.

Chicago (city area)

Illinois (IL) also shares with these area codes:

| 217
| 224
| 309
| 312
| 331
| 618
| 630
| 708
| 773
| 779
| 815
| 847
| 872
     

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