Area Codes in Western Pennsylvania
There are currently three area codes in Western Pennsylvania: 412, 724 and 878.
412/724/878 Area Code Map
Outlines the rate centers in the 412/878 region.
On February 1, 1998, the 412 area code was split and the 724 area code was created. The 412/724 area codes began thousands-block pooling in October 2001.
On July 12, 2001, the 878 area code began as an overlay for both the 412 and 724 area codes.
The area code 878 can be given to customers in the 724 region when any customer orders new service, adds an additional line, or moves. With all overlays, customers must dial 10 digits for all calls.
Currently there is no exhaust date predicted for these area codes.