| 8401 | PRSP | PRECISION STRIP TRANSPORT INC | | | SCAC4 |
| 8402 | PRSQ | PRAIRIE STATE TRUCKING SERVICE INC | | | SCAC3 |
| 8403 | PRSR | PROS CORP | | | SCAC4 |
| 8404 | PRSS | PISTON RING SERVICES | | | SCAC4 |
| 8405 | PRSU | TEXTAINER EQUIPMENT MANAGEMENT LTD | | BM | BIC |
| 8406 | PRSU | NAVIERAS DE PUERTO RICO | | | SCAC3 |
| 8407 | PRSV | PARIS TRANSPORTATION SERVICES | | | SCAC4 |
| 8408 | PRSX | Progress Rail Services Corp. | added 7/1998; 7/2000-7/2005 | | NAKINA |
| 8409 | PRSX | Phoenix Refining Division—Chestnut & Smith Corp. | 7/1923 | | NAKINA |
| 8410 | PRSX | Phoenix Refining Co. | 8/1920 | | NAKINA |
| 8411 | PRSX | Progress Rail Services Corp. | added 7/98; 7/2000 | | NRHS |
| 8412 | PRSX | *PHOENIX REFINING DIV., CHESTNUT & SMITH CORP. | | | PWRC |
| 8413 | PRSX | +PROGRESS RAIL SERVICES CORPORATION {PACIFIC RAIL SERVICES} | | | PWRC |
| 8414 | PRSX | Progress Rail Services Corporation | | | RSRV |
| 8415 | PRSX | PROGRESS RAIL SERVICES CORPORATION | | | SCAC4 |
| 8416 | PRSX | Progress Rail Services Corp. | | USA | TRAFFIC |
| 8417 | PRSY | PRECISION TRANSPORT INC | | | SCAC4 |
| 8418 | PRT | Atlantic Coast Jet, Inc. | IATA: DD, Callsign: Patriot, IATA Prefix: 949, IATA designator changed to DD | USA | AVCODES |
| 8419 | PRT | Prompt Air, Inc. | Callsign: Prompt Air, | USA | AVCODES |
| 8420 | PRT | Atlantic Coast Jet, Inc. | IATA: DD, Callsign: Patriot, IATA Prefix: 949, Desigantor DD recalled by IATA. IATA designator changed from DD* | USA | AVCODES |
| 8421 | PRT | Prime Service Italia S.r.l. | Callsign: Prime Italia, | I | AVCODES |
| 8422 | PRT | Atlantic Coast Jet | | | ICAO1 |
| 8423 | PRT | Parr Terminal R.R. | 1/1975-1/1994; eliminated 7/1997; 7/2000 | | NAKINA |
| 8424 | PRT | Parr Terminal R.R. | 1/75-1/94; eliminated 7/97; 7/2000 | | NRHS |
| 8425 | PRT | PARR TERMINAL RAILROAD | | | PWRC |
| 8426 | PRT | Philadelphia Rapid Transit | | US-PA | TRAFFIC |
| 8427 | PRT | Przedsiębiorstwo Robót Torowych “TORREMS” sp. z o. o. | | PL | VKM |
| 8428 | PRTA | PRO-TRUCKER | | | SCAC1 |
| 8429 | PRTA | PROPANE RESOURCES TRANSPORTATION IN | | | SCAC4 |
| 8430 | PRTC | PROVANCE TRUCKING CO | | | SCAC3 |
| 8431 | PRTD | Portland Traction Co. | added 10/1989; eliminated 7/1992; 1/1994-7/2005 | | NAKINA |
| 8432 | PRTD | Portland Traction Co., Portland R.R. and Terminal Division | 10/1957-1/1980; eliminated 10/1989 | | NAKINA |
| 8433 | PRTD | Portland Traction Co., Portland R.R. and Terminal Division | 10/57-1/80; eliminated 10/89 | | NRHS |
| 8434 | PRTD | Portland Traction Co. | added 10/89; eliminated 7/92; 1/94-7/2000 | | NRHS |
| 8435 | PRTD | PORTLAND TRACTION COMPANY | | | PWRC |
| 8436 | PRTD | Portland Traction | | | RSRV |
| 8437 | PRTD | PORTLAND TRACTION COMPANY | | | SCAC3 |
| 8438 | PRTE | PROTEIN EXPRESS | | | SCAC3 |
| 8439 | PRTF | PRUITT, TY TRUCKING | | | SCAC3 |
| 8440 | PRTG | PORT TRUCKING INC | | | SCAC4 |
| 8441 | PRTH | PROTRANS INC | | | SCAC4 |
| 8442 | PRTJ | PRIDE TRANSPORT CO | | | SCAC3 |
| 8443 | PRTJ | PETERS TRUCKING INC | | | SCAC4 |
| 8444 | PRTK | PRIMA TRUCKING CO | | | SCAC3 |
| 8445 | PRTL | PORTILLO BROKERAGE | | | SCAC3 |
| 8446 | PRTL | PIELEMEIER TRANSPORT LLC | | | SCAC4 |
| 8447 | PRTM | PARTS MOTOR LINES INC | | | SCAC3 |
| 8448 | PRTM | PROCTOR TRUCKING | | | SCAC4 |
| 8449 | PRTO | PEOPLES, WILLIAM R | | | SCAC3 |
| 8450 | PRTO | PARROT TRANSPORT | | | SCAC4 |
| 8451 | PRTQ | PRINGLE TRANSFER | | | SCAC3 |
| 8452 | PRTR | PORTER, FRANK M, AND FRANCIS PORTER | | | SCAC3 |
| 8453 | PRTR | PREMIUM TRANS | | | SCAC4 |
| 8454 | PRTS | PROGRESSIVE TRANSPORTATION SERVICES | | | SCAC3 |
| 8455 | PRTT | PRATTS TRANSPORTATION, INCORPORATED | | | SCAC3 |
| 8456 | PRTU | GS LINES - TRANSPORTES MARITIMOS LDA | | P | BIC |
| 8457 | PRTU | PORTLINE-TRANSPORTES MARITIMOS INTE | | | SCAC4 |
| 8458 | PRTV | PRINCE TRUCKING INC | | | SCAC3 |
| 8459 | PRTX | *PORT RAILROAD | | | PWRC |
| 8460 | PRTX | +PEORIA RIVER TERMINAL, INC. | | | PWRC |
| 8461 | PRTX | PEORIA RIVER TERMINIAL INC | | | SCAC4 |
| 8462 | PRTY | PROUTY TRUCKING INC | | | SCAC3 |
| 8463 | PRTZ | PACKER RIVER TERMINAL | | | PWRC |
| 8464 | PRU | Aerolineas Peruanas, S.A. | IATA: EP, Callsign: Apsa, | PE | AVCODES |
| 8465 | PRU | Prinair, Inc. | Callsign: Colorbird, | PRI | AVCODES |
| 8466 | PRUA | PRUITT, AVERY AND SON INC | | | SCAC3 |
| 8467 | PRUC | PATTEN, R TRUCKING | | | SCAC3 |
| 8468 | PRUD | PRUDHOMME TRUCK TANK SERVICE INC | | | SCAC3 |
| 8469 | PRUD | PRUDE TRANSPORT | | | SCAC4 |
| 8470 | PRUE | PERDUE INC | | | SCAC4 |
| 8471 | PRUF | PRUEHSNER EXCAVATING & FARMING | | | SCAC3 |
| 8472 | PRUG | PRUITT TRUCKING | | | SCAC3 |
| 8473 | PRUG | P R TRUCKING | | | SCAC4 |
| 8474 | PRUH | PERU HOLLOW TRANSPORT CO | | | SCAC3 |
| 8475 | PRUI | PERU TANK LINES INC | | | SCAC3 |
| 8476 | PRUK | PRUDENCE TRUCKING INC | | | SCAC3 |
| 8477 | PRUN | PRUT TRUCKING INC | | | SCAC4 |
| 8478 | PRUO | PRUITT MOVING AND STORAGE COMPANY | | | SCAC3 |
| 8479 | PRUQ | PETROLEUM TRANSPORT COMPANY INC | | | SCAC3 |
| 8480 | PRUQ | PETROLEUM TRANSPORT COMPANY INC | | | SCAC4 |
| 8481 | PRUR | PARLOUR COACH, THE | | | SCAC3 |
| 8482 | PRUS | PROUSE TRANSPORT LTD | | | SCAC3 |
| 8483 | PRUS | PROUSE TRANSPORT LTD | | | SCAC4 |
| 8484 | PRUT | PRUITT, DELORES | | | SCAC3 |
| 8485 | PRUT | PRUT LOGISTIC INC | | | SCAC4 |
| 8486 | PRV | Provincial Express, Inc. | Callsign: Provincail, Subsidary of Labrador Airways Ltd. WJ/LAL | CDN | AVCODES |
| 8487 | PRV | Premier Aviation Services S.A. | Callsign: Explorer, | GR | AVCODES |
| 8488 | PRV | Aerochaco Líneas Aéreas | IATA: VM, Callsign: Aerochaco, Founded in 2008. | RA | AVCODES |
| 8489 | PRV | Jet-A, LLC | Callsign: Pre Vat, | USA | AVCODES |
| 8490 | PRV | Provincial Express | | | ICAO1 |
| 8491 | PRV | Pearl River Valley R.R. Co. | 1/1975-1/1980; eliminated 10/1986; 1/1994-7/2005 | | NAKINA |
| 8492 | PRV | Pearl River Valley R.R. Co. | 1/75-1/80; eliminated 10/86; 1/94-7/2000 | | NRHS |
| 8493 | PRV | PEARL RIVER VALLEY RAILROAD CO. | | | PWRC |
| 8494 | PRV | Pearl River Valley Railroad | | | RSRV |
| 8495 | PRVA | PROGRESSIVE VAN LINES LLC | | | SCAC4 |
| 8496 | PRVB | PURVIS BROTHERS INC | | | SCAC4 |
| 8497 | PRVC | PROVINCIAL TRANSPORT COMPANY | | | SCAC3 |
| 8498 | PRVC | PROVEEDORA DE PRODUCTOS ALIMENTICIO | | | SCAC4 |
| 8499 | PRVE | PRIVETT, ROY L | | | SCAC3 |
| 8500 | PRVE | PREMIUM VENTURES INC | | | SCAC4 |
