Where is Area Code 331?

Located in the state of Illinois (IL)

Area Code 331


Area Code 331

The 331 Area Code is located in the state of Illinois. Area Code 331 is one of the 312 three-digit telephone area codes in the USA. It covers roughly 48,070 unique phone numbers and 8,885,919 individuals near the cities of Chicago-Naperville-Elgin.
State:Illinois (IL)
Metro Area
Metro Area:Chicago-Naperville-Elgin
Estimated Population
Est. Population:8,885,919
Nearby Area Codes
Nearby Area Codes:219, 224, 262, 312, 331, 630, 708, 773, 779, 815, 847, 872
Phone Prefixes
Phone Prefixes:111
Phone Numbers
Phone Numbers: 48,070

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