Phone Numbered
Share on Facebook
Share on Twitter

331 Area Code


The 9 central offices below make up area code (331) in Illinois.


These exchanges encompass the following IL cities:

  • Aurora
  • Geneva
  • Bartlett
  • Downers Grove
  • Oswego

Learn more: Area code 331 at Wikipedia



Home · Area Codes · About Us · FAQ · Privacy Policy · Contact Us
All rights reserved. © 2021 PhoneNumbered