779 area code
Rockford area, Central Time.Area code 779 covers Rockford, Joliet, Momence and 195 more places in Illinois, on Central Time. 815 covers the same area.
Right now in Rockford
Central Time (CST, UTC-6; CDT, UTC-5 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
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Where 779 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 779 has 198. Each one's share is how many 779 numbers start there. Its biggest metro area is Chicago-Naperville-Elgin, IL-IN.
- Rockford12%
- Joliet7%
- Momence5%
- DeKalb4%
- Freeport3%
- Kankakee3%
- Woodstock3%
- Frankfort2%
Also: McHenry, Plainfield, Sterling, Forrest, Crystal Lake, South Beloit, Dixon, LaSalle, Sandwich, Oglesby, Belvidere, New Lenox + 178 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 779 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 779 number to them, since you can't tell a work line from a personal cell.
What applies to 779Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
779 and 815
779 went into service on March 17, 2007. 779 and 815 cover the same area, so new numbers can get either code and neighbors can have different area codes. 779 holds 31% of the area's exchanges; 815 holds the most. Local calls take all 10 digits.
- 1947815 overlay
- 2007779 starts
Source: NANPA area code database
Calling a list of 779 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
779 area code FAQ
What area code is 779?
779 is an Illinois area code for Rockford, Joliet, Momence, DeKalb and 194 more places.
What time zone is the 779 area code in?
Central Time (CST, UTC-6; CDT, UTC-5 in summer).
Is 815 the same as 779?
Same area, different code. 779 and 815 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 779 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 779 area code start?
On March 17, 2007.
Calling 779 numbers? Reach more of them.
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