Rock City, Illinois Area Code

Rock City, IL is officially utilizing an area code overlay in which area codes 779 and 815 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.

In addition to Rock City, IL area code information read more about area codes 779 and 815 details and Illinois area codes.

Rock City, IL is located in Stephenson County and observes the Central Time Zone.
View our Times by Area Code tool.