Area code and exchange code is assigned to every constituent of city in the United States. The area and exchange codes of the telephone can be used to find information about a region. Area code 412 and exchange code 274 is assigned to Bethel Park. The latitude and longitude corresponding to 40.33 and -80.02 can be used to find an area on the map. Arch Wireless Holdings, Inc.operates most of the land lines in United States.