Mount Lebanon, Pennsylvania Area Code
Mount Lebanon, PA utilizes an area code overlay in which area codes 412 and 878 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
In addition to Mount Lebanon, PA area code information read more about area codes 412 and 878 details and Pennsylvania area codes.
Mount Lebanon, PA is located in Allegheny County and observes the Eastern Time Zone. View our Times by Area Code tool.