Cheswick, 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 Cheswick, PA area code information view area codes 724 and 878 details and Pennsylvania area codes.
Cheswick, PA is located in Allegheny County and observes the Eastern Time Zone. View our Times by Area Code tool.