Dennis Diefenderfer Rodney Diefenderfer And Joseph Diefenderfer is an active carrier listed under USDOT number 00853580. The company is listed with MC number 309441, and its operating authority is currently shown as AUTHORIZED in available OTR411/FMCSA record data. The company address on file is 415 Doe Run Road, East Fallowfield, Pa 19320. This OTR411 profile is provided as a public reference for drivers, carriers, brokers, shippers, and transportation professionals looking to identify or review company information.