Karns City, Pennsylvania Area Code
Karns City, PA utilizes an area code overlay in which area codes 724 and 878 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Karns City, PA area code information read more about area codes 724 and 878 details and Pennsylvania area codes.
Karns City, PA is located in Butler County and observes the Eastern Time Zone. View our Times by Area Code tool.