| General Information about Area Code 779 | |
|---|---|
| Country | United States |
| State / Province / Territory | Illinois |
| Major City | Rockford |
| Time Zone | Central (UTC-06:00) |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 779-772 | Rockford | Winnebago | Wireless |
| 779-216 | Frankfort | Will | Landline |
| 779-218 | Watseka | Iroquois | Landline |
| 779-232 | Wilmington | Will | Landline |
| 779-432 | Sheffield | Bureau | Landline |
| 779-202 | Galena | Jo Daviess | Landline |
| 779-529 | Manteno | Kankakee | Landline |
| 779-213 | Oglesby | La Salle | Landline |
| 779-803 | New Lenox | Will | Landline |
| 779-220 | Crystal Lake | Mchenry | Landline |
| 779-400 | Dekalb | Dekalb | Landline |
| 779-701 | Kankakee | Kankakee | Landline |
| 779-601 | La Salle | La Salle | Landline |
| 779-888 | Rockford | Winnebago | Landline |
| 779-456 | Joliet | Will | Wireless |
| 779-978 | Sandwich | Dekalb | Wireless |
| 779-229 | Hennepin | Putnam | Landline |
| 779-228 | Mazon | Grundy | Landline |
| 779-423 | Rockford | Winnebago | Landline |
| 779-210 | Rockford | Winnebago | Landline |