List of reporting marks: P
Note: Marks ending in U are for container owners; marks ending in X are not common carriers; marks ending in Z are for trailers without flanged wheels. All other marks are of common-carrier railroads.
P[]
- PACY - Prairie Central Railway
- PAE - Peoria and Eastern Railway; Conrail
- PAL - Paducah and Louisville Railway
- PAM - Pittsburgh, Allegheny and McKees Rocks Railroad
- PARX -
- PARY -
- PAS - Pan Am Southern
- PAUT - ; Conrail
- PBFX - IBP, Inc.; Tyson Foods
- PBL - Philadelphia Belt Line Railroad
- PBLX - Pillsbury
- PBNE -
- PBR - Patapsco and Back Rivers Railroad
- PBRR -
- PBVR - Port Bienville Railroad
- PC - Penn Central; Norfolk Southern
- PCA - Penn Central; Norfolk Southern
- PCB - Penn Central; Norfolk Southern
- PCCX - Peabody Coal Company
- PCEX - GE Rail Services
- PCFX - Pacific Car and Foundry Company
- PCIX - ; ACF Industries
- PCMX -
- PCN - Point Comfort and Northern Railway
- PCRC - Panama Canal Railway Company; Kansas City Southern Railway
- PCSX - GE Rail Services
- PCTX -
- PCY -
- PDQX -
- PE - Pacific Electric Railway; Conrail
- PECX -
- PENX -
- PEPX - Potomac Electric Power Company
- PER -
- PF - Pioneer and Fayette Railroad
- PFE - Pacific Fruit Express; Union Pacific Railroad
- PFM -
- PGDX -
- PGE - Pacific Great Eastern Railway; British Columbia Railway; Canadian National Railway
- PGER - Pacific Great Eastern Railway; British Columbia Railway; Canadian National Railway
- PGEX - Portland General Electric Company
- PGHX -
- PGMX -
- PGR - Progressive Rail
- PHCR - Port Colborne Harbour Railway
- PHD - Port Huron and Detroit Railroad; Chessie System; CSX Transportation
- PHL - Pacific Harbor Line
- PI - Paducah and Illinois Railroad
- PICK - Pickens Railroad
- PJR -
- PLCX - Pullman Leasing Company;
- PLE - Pittsburgh and Lake Erie Railroad; New York Central Railroad; Penn Central; Conrail; CSX Transportation (after Conrail breakup)
- PLEX -
- PLLU - Polynesia Line
- PLLZ - Polynesia Line
- PLMX -
- PLWX -
- PM - Pere Marquette Railway; Chesapeake and Ohio Railway; Chessie System; CSX Transportation
- PMLX -
- PMRX -
- PN - Piedmont and Northern Railway; Seaboard Coast Line; CSX Transportation
- PN - Pennsylvania Northeastern Railroad
- PNRW - Piedmont and Northern Railway (division of Patriot Rail Corporation)
- PNWR - Portland and Western Railroad
- POHC - Pittsburgh and Ohio Central Railroad
- POTB - Port of Tillamook Bay Railroad
- PPAX -
- PPCX -
- PPGX - PPG Industries, Inc.
- PPHX -
- PPLX - Pennsylvania Power and Light Company
- PPNX -
- PPRX - Phillips Petroleum Company
- PPU - Peoria and Pekin Union Railway
- PRCX - 20th Century Fox
- PRGX -
- PRL - Penn Eastern Rail Lines, Inc.; East Penn Railway
- PRLX - Progress Rail Services Corporation
- PRMU -
- PROX - Procor
- PRR - Pennsylvania Railroad; Penn Central; Norfolk Southern
- PRRX - Norfolk Southern
- PRSL - Pennsylvania-Reading Seashore Lines; Norfolk Southern
- PRSX - Progress Rail Services Corporation
- PS - Pittsburg and Shawmut Railroad
- PSCX - Public Service Company of Colorado
- PSL - ; Illinois Central Railroad; Canadian National Railways
- PSPX - Phillips Petroleum Company
- PSR - Pittsburg and Shawmut Railroad
- PTM - Portland Terminal Company; Maine Central Railroad; Pan Am Railways
- PTEX - Canpotex
- PTLX - ; GE Rail Services
- PVVR - ; Spokane, Portland and Seattle Railway; Burlington Northern Railroad
- PW - Providence and Worcester Railroad
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- Lists of AAR reporting marks