779 Area Code
Northern Illinois (overlay), Illinois
Area code 779 is located in Northern Illinois (overlay), Illinois. It covers Rockford, Joliet, and surrounding areas in the Central time zone (UTC-6). Administered by NANPA.
Where is area code 779?
Area code 779 is located in Northern Illinois (overlay), Illinois. It covers Rockford, Joliet, and surrounding areas in the Central time zone (UTC-6).
Cities Covered by Area Code 779
Area code 779 primarily serves the Northern Illinois (overlay) area of Illinois. The exact coverage includes Rockford, Joliet, and Aurora (part), along with surrounding communities and suburbs.
Time Zone
Central Time — UTC-6
Area code 779 operates in the Central Time Zone. When calling 779 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 779
Area code 779 was introduced in 2007 as a geographic area code serving Northern Illinois (overlay), Illinois. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.