Area Codes for Chicago, Illinois
Chicago, Illinois is served by overlaying area codes 773/872.
Area code 773 is the parent Numbering Plan Area and has been in service since October 12, 1996.
The downtown area of Chicago, also known as the Loop, is in overlay complex 312/872 (the newly introduced area code 872 covers both 312 and 773).
Map of overlay complex 773/872
The current time in Chicago, Illinois is 11:59:27 PM, Central Time.