To faciltiate users, the United States of America is divided into regions known as Area Codes, corresponding to particular geographic telephone dialing areas.
An area code denotes the regional location of a phone number within the United States.
The Area Code table below shows an area codes each.
Area Code 779 listing, by city
@The cities listed with each area code are the major cities for that area code;
| City / State | Area code | Zip Code | County | Iso | |
|---|---|---|---|---|---|
| Dixon (Illinois) | 779 | 61021 | Lee | US-IL | |
| Joliet (Illinois) | 779 | 60436 | Will | US-IL | |
| Mchenry (Illinois) | 779 | 60051 | McHenry | US-IL | |
| Newark (Illinois) | 779 | 60541 | Kendall | US-IL | |
| Rockford (Illinois) | 779 | 61107 | Winnebago | US-IL | |
| Watseka (Illinois) | 779 | 60970 | Iroquois | US-IL | |
| Wonder Lake (Illinois) | 779 | 60097 | McHenry | US-IL |