Learn about the 312 area code, including its location, cities, time zone, introduction date, and related area codes.
312 Area Code Details
Major Cities in the 312 Area Code
The 312 area code is associated with the following cities and communities:
- West Chicago
Where Is Area Code 312 Located?
The 312 area code serves communities in Illinois. The exact communities and numbering assignments can change as telephone numbering resources are updated.
312 Area Code Time Zone
The 312 area code is associated with the Central time zone.
When Was 312 Area Code Introduced?
The 312 area code was introduced in 01-Jan-1947.
How to Call a 312 Area Code Number
For a call within the same numbering plan, dial the required local number according to your carrier’s dialing rules. For calls from outside the United States, use the United States country code (+1), followed by the area code and seven-digit telephone number.
Related Area Codes
312 Area Code FAQ
What state is 312 area code in?
The 312 area code is associated with Illinois.
What time zone is 312 area code in?
The 312 area code is associated with Central.
What cities use 312 area code?
West Chicago
More Questions About Area Code 312
What state is area code 312 in?
Area code 312 is associated with Illinois.
What time zone is area code 312 in?
The listed time zone for area code 312 is Central.