| 1 | PRS | Pars Air | Callsign: Pars Sky, | IR | AVCODES |
| 2 | PRS | PEARL RIVER VALLEY RAILROAD CO. | | | PWRC |
| 3 | PRSB | P R S CONSULTING GROUP INC | | | SCAC3 |
| 4 | PRSC | PRECISION AIR CARGO | | | SCAC4 |
| 5 | PRSD | PREMIER RECYCLING SARNIA LTD | | | SCAC4 |
| 6 | PRSE | PRIORITY SERVICES INC | | | SCAC3 |
| 7 | PRSE | PERISHABLE EXPRESS LLC | | | SCAC4 |
| 8 | PRSF | PARSEC INC | | | SCAC3 |
| 9 | PRSF | PRESTON, FRANK W TRUCKING | | | SCAC4 |
| 10 | PRSG | PRSI TRADING COMPANY LP | | | SCAC4 |
| 11 | PRSH | PROSHIPPING GROUP | | | SCAC4 |
| 12 | PRSI | PRISCO (SINGAPORE) PTE LTD | | | SCAC4 |
| 13 | PRSJ | PUERTO RICAN SHIPPING AGENCY INC | | | SCAC3 |
| 14 | PRSJ | PROSHIPLINE | | | SCAC4 |
| 15 | PRSK | PIERCESON TRUCKING INC | | | SCAC3 |
| 16 | PRSK | PREUSSNER TRUCK LINES INC | | | SCAC4 |
| 17 | PRSL | Consolidated Rail Corp. | 1/1980-1/1994 | | NAKINA |
| 18 | PRSL | Pennsylvania-Reading Seashore Lines | 1/1975 | | NAKINA |
| 19 | PRSL | Pennsylvania-Reading Seashore Lines | Jan-75 | | NRHS |
| 20 | PRSL | Consolidated Rail Corp. | 1/80-1/94 | | NRHS |
| 21 | PRSL | CONSOLIDATED RAIL CORP. [PENNSYLVANIA-READING SEASHORE LINES] | | | PWRC |
| 22 | PRSL | Pennsylvania-Reading Seashore Lines (Norfolk Southern) | | | RSRV |
| 23 | PRSL | PRESSLEY TRUCKING CO INC | | | SCAC3 |
| 24 | PRSL | PRESLER CARRIERS LLC | | | SCAC4 |
| 25 | PRSL | Pennsylvania-Reading Seashore Lines | | USA | TRAFFIC |
| 26 | PRSM | PEERS MOVING COMPANY | | | SCAC3 |
| 27 | PRSN | PRESNYA SHIPPING COMPANY LIMITED | | | SCAC3 |
| 28 | PRSO | PORTLAND ROAD SERVICES | | | SCAC4 |
| 29 | PRSP | PRECISION STRIP TRANSPORT INC | | | SCAC3 |
| 30 | PRSP | PRECISION STRIP TRANSPORT INC | | | SCAC4 |
| 31 | PRSQ | PRAIRIE STATE TRUCKING SERVICE INC | | | SCAC3 |
| 32 | PRSR | PROS CORP | | | SCAC4 |
| 33 | PRSS | PISTON RING SERVICES | | | SCAC4 |
| 34 | PRSU | TEXTAINER EQUIPMENT MANAGEMENT LTD | | BM | BIC |
| 35 | PRSU | NAVIERAS DE PUERTO RICO | | | SCAC3 |
| 36 | PRSV | PARIS TRANSPORTATION SERVICES | | | SCAC4 |
| 37 | PRSX | Progress Rail Services Corp. | added 7/1998; 7/2000-7/2005 | | NAKINA |
| 38 | PRSX | Phoenix Refining Division—Chestnut & Smith Corp. | 7/1923 | | NAKINA |
| 39 | PRSX | Phoenix Refining Co. | 8/1920 | | NAKINA |
| 40 | PRSX | Progress Rail Services Corp. | added 7/98; 7/2000 | | NRHS |
| 41 | PRSX | *PHOENIX REFINING DIV., CHESTNUT & SMITH CORP. | | | PWRC |
| 42 | PRSX | +PROGRESS RAIL SERVICES CORPORATION {PACIFIC RAIL SERVICES} | | | PWRC |
| 43 | PRSX | Progress Rail Services Corporation | | | RSRV |
| 44 | PRSX | PROGRESS RAIL SERVICES CORPORATION | | | SCAC4 |
| 45 | PRSX | Progress Rail Services Corp. | | USA | TRAFFIC |
| 46 | PRSY | PRECISION TRANSPORT INC | | | SCAC4 |
