Cheswick, PA utilizes an area code overlay in which area codes 724 and 878 serve the same geographic area. The area code overlay was put into service on August 17, 2001 at which time area code 878 was implemented as an overlay of area codes 724 and 412. Area Code 724 was created from a split of area code 412 in 1998. Ten digit dialing (area code + seven digit number) is necessary because two different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.
In addition to Cheswick, PA area codes 724 and 878 serve many suburbs surrounding Pittsburgh and most of southwestern Pennsylvania, including the larger cities and communities of Mccandless Township, New Castle, Plum, and Upper St. Clair.
Cheswick, PA is located in Allegheny County and observes the Eastern Time Zone. View our Times by Area Code tool.