Area code 779
Area code 779 serves Rockford and nearby parts of Illinois, including Joliet, Kankakee and DeKalb. It is on Central Time, which observes daylight saving time. 815 is an overlay for the same area.
Area code 779 at a glance
| State | Illinois (IL) |
| Main city | Rockford |
| Time zone | Central Time |
| UTC offset | UTC−6 in winter, UTC−5 in summer |
| Daylight saving time | Yes |
| Overlay codes | 815 |
Cities in 779
- Rockford
- Joliet
- Kankakee
- DeKalb
An area code shows where a number was first assigned. Mobile numbers keep their area code when people move, so the person you’re calling may be somewhere else.
When you can call a 779 number
Federal telemarketing rules under the TCPA allow sales calls between 8 AM and 9 PM in the called person’s local time. Here is that window for a 779 number, shown in your own time zone.
General information, not legal advice. Some states add rules for Sundays, holidays or the number of calls. See our calling hours guide.
| If you’re on | You can call 779 between |
|---|---|
| Eastern | 9:00 AM to 10:00 PM |
| Central | 8:00 AM to 9:00 PM |
| Mountain | 7:00 AM to 8:00 PM |
| Arizona | 6:00 AM to 7:00 PM |
| Pacific | 6:00 AM to 7:00 PM |
See the time in 779 without leaving your CRM
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Other area codes in Illinois
Questions about 779
What time zone is area code 779?
Area code 779 is on Central Time. It observes daylight saving time.
Where is area code 779?
Area code 779 is in Illinois. Its main city is Rockford, and it also covers Joliet, Kankakee and DeKalb.
What are the legal hours to call a 779 number?
Under the federal TCPA, sales calls are allowed from 8 AM to 9 PM in the called person’s local time. Personal and informational calls are not limited by these hours.
What area codes overlay 779?
815 covers the same area as 779, so numbers in the same town can have either code.