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331 Area Code, Where is Area Code 331?

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  2. Illinois
  3. 331 Area Code

331 Area Code is part of 5 counties in the state of Illinois. There are around 13 cities and 63 other places such as towns, cdps and villages in the 331 area code. Area code 331 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Illinois. Below you will find more info about Code and also zip codes, counties, cities and the post offices that belong to this Area Code.

Counties that Use 331 Area Code

331 Area Code covers 5 Counties

Major Cities that Use 331 Area Code

331 Area Code covers 13 Major Cities

All Places, Towns or Villages that Use 331 Area Code

331 Area Code covers 63 Towns, Villages or other places

Sources: North American Numbering Plan Administration (NANPA), telecom providers, and the U.S. Census Bureau.