Area Code 331
Illinois (IL) • Aurora, Naperville, Bolingbrook, Downers Grove, Saint Charles, Wheaton, Addison, Batavia • Central Time (CT)
What Stands Out
- •Coverage: 1.4M people across 56 ZIP codes.
- •Major cities: Aurora, Naperville, Bolingbrook.
Spotlight: Coverage
Snapshot highlights for area code 331.
Income
90th
Home values
80th
Low poverty
71st