779 Area Code
The 11 central offices below make up area code (779) in Illinois.
These exchanges encompass the following IL cities:
- Crystal Lake
- La Salle
- Rockford
- Sandwich
- Dekalb
- Kankakee
- Dixon
- Joliet
Learn more: Area code 779 at Wikipedia
The 11 central offices below make up area code (779) in Illinois.
These exchanges encompass the following IL cities:
Learn more: Area code 779 at Wikipedia