Chicago Area Codes, Illinois, Unites States

How to call Chicago, Illinois?

Chicago has 3 area codes. To call Chicago you need to dial the Unites States country code (+1) and one of the following area codes:

312 773 872

How to know if I'm receiving calls from Chicago, Illinois?

You are receiving calls from Chicago when the phone number starts with one of the following combinations:

1-312 1-773 1-872

Other area codes in Unites States