331 area code
Area code 331 is in Illinois, United States, in the Central time zone. It covers Addison, Bartlett, Batavia, Bensenville, Bloomingdale, Bolingbrook and more.
State / Province
Illinois (IL)
Country
United States
Region
Midwest
Time zone
Central
Current local time
—
Approx. location
41.8772, -88.0948 ↗
How to dial a 331 number
- National format
- (331) 555-0100
- International (E.164)
- +1 331 555 0100
- From abroad
- +1 331 …
Cities & areas in the 331 area code
25 known locations — a selection:
Addison
Bartlett
Batavia
Bensenville
Bloomingdale
Bolingbrook
Carol Stream
Darien
Downers Grove
Elmhurst
Glen Ellyn
Glendale Heights
Hanover Park
Lisle
About area code 331
Area code 331 is one of the North American Numbering Plan (NANP) codes serving Illinois. In the NANP a full number looks like +1 (331) NXX-XXXX: the +1 is the country code for the US and Canada, 331 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.