312 area code
Area code 312 is in Illinois, United States, in the Central time zone. It covers West Chicago and more.
State / Province
Illinois (IL)
Country
United States
Region
Midwest
Time zone
Central
Current local time
—
Approx. location
41.8847, -88.204 ↗
How to dial a 312 number
- National format
- (312) 555-0100
- International (E.164)
- +1 312 555 0100
- From abroad
- +1 312 …
Cities & areas in the 312 area code
1 known location — a selection:
West Chicago
About area code 312
Area code 312 is one of the North American Numbering Plan (NANP) codes serving Illinois. In the NANP a full number looks like +1 (312) NXX-XXXX: the +1 is the country code for the US and Canada, 312 is the area code, and the remaining seven digits identify the specific line. A call is charged by your own carrier's plan, not by the area code itself.