Caller ID for
Area code 779
Area code 779 Rockford, Illinois
Area code 779 is in Illinois, with numbers assigned in Rockford, Joliet, Momence and 131 more places. It’s 11:11 PM there now.
- State
- Illinois17 area codes in Illinois
- Time zone
- Central11:11 PM there now
- Exchanges
- 354134 places
- Overlay
- 815Same area, 10-digit dialing
- No sign-up
- We never contact the number
- Spam risk included
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Where area code 779 is
Numbers in 779 are assigned to 134 places in 25 counties: Winnebago County, Will County, Ogle County, Kendall County, Kankakee County, DeKalb County, plus 19 more.
No single place dominates: Rockford, the largest, has 12% of the exchanges.
- Rockford44
- Joliet26
- Momence20
- DeKalb15
- Freeport12
- Kankakee9
- Woodstock9
- Frankfort8
- Forrest7
- Plainfield6
- McHenry6
- Sterling6
- Crystal Lake5
- South Beloit5
- LaSalle4
- Sandwich4
- Dixon4
- Galena3
- Oglesby3
- Braidwood3
- Sycamore3
- Wilmington3
- Streator3
- Dwight3
Phone companies in 779
354 blocks of numbers in 779 are held by 41 phone companies. The most belong to Inteliquent (48), AT&T Mobility (43) and Stratus Networks (35).
A large share, about 63%, belongs to competitive and internet phone carriers; wireless networks hold 30% and local phone and cable companies 7%.
A block’s holder is the company it was first assigned to; numbers can move to other carriers since.
History and overlays
779 went into service in 2007, added to the area of 815.
815 (since 1947) shares the same area, so a new number there can get any of these codes and local calls are dialed with all 10 digits.
161 new exchanges were assigned since 2021, the latest in October 2026.
Calling 779
It’s 11:11 PM Central time in 779 right now.
From elsewhere in the U.S., dial 1, 779 and the 7-digit number; inside the area, all 10 digits too.
Nearby area codes
Illinois has 17 area codes: 217, 224, 309, 312, 331, 447, 464, 618, 630, 708, 730, 773, 779, 815, 847, 861 and 872.
- 331 · Aurora, IL · about 26 mi
- 630 · Roselle, IL · about 33 mi
- 464 · Oakford, IL · about 38 mi
- 708 · La Grange, IL · about 43 mi
- 847 · Northbrook, IL · about 46 mi
- 224 · Northbrook, IL · about 46 mi
From the North American Numbering Plan Administrator’s area code and exchange records (10/22/2026) and U.S. Census place and county names. Places and companies are where number blocks were assigned, not where anyone lives or which carrier a number uses today.
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Questions about 779
Where is area code 779?
In Illinois, covering Rockford, Joliet and Momence and other places across 25 counties.
What time zone is 779 in?
Central time. It was 11:11 PM there when this page loaded.
Is 779 an overlay?
Yes. 815 serves the same area, so dial all 10 digits for local calls.
Which phone companies have 779 numbers?
41 companies hold blocks; the most belong to Inteliquent, AT&T Mobility and Stratus Networks. About 30% of blocks are wireless.
Is 779 running out of numbers?
Not on record. 161 new exchanges have been assigned since 2021.