| 7401 | PPIX | Pacific Petrochemicals, Inc. | added 10/1965; 10/1966; eliminated 7/1968 | | NAKINA |
| 7402 | PPIX | National Car Co. | eliminated 7/1959 | | NAKINA |
| 7403 | PPIX | Fruit Growers Express Co. (reporting marks for Pearl Packing Co.) | 7/1937-10/1957 | | NAKINA |
| 7404 | PPIX | Pearl Packing Co. | 7/1935 | | NAKINA |
| 7405 | PPIX | Pearl Packing Co. (National Car Co.) | Apr-38 | | NRHS |
| 7406 | PPIX | Fruit Growers Express Co. | 1/52-10/57 | | NRHS |
| 7407 | PPIX | National Car Co. | eliminated 7/59 | | NRHS |
| 7408 | PPIX | Pacific Petrochemicals, Inc. | added 10/65; 10/66; eliminated 7/68 | | NRHS |
| 7409 | PPIX | Ashland Oil & Refining Co. | added 7/68 | | NRHS |
| 7410 | PPIX | Pacific Petrochemicals, Inc. | eliminated 4/70 | | NRHS |
| 7411 | PPIX | *PEARL PACKING CO. (NCCO; FRUIT GROWERS EXPRESS CO.) | | | PWRC |
| 7412 | PPIX | *PACIFIC PETROCHEMICALS (ASHLAND OIL & REFINING CO.) | | | PWRC |
| 7413 | PPIX | PACIFIC PETROCHEMICALS INC | | | SCAC3 |
| 7414 | PPIZ | PEPIN IRESCO, INC. | | | PWRC |
| 7415 | PPJ | Premier Air, Inc. d/b/a Premier Private Jets | Callsign: Premier Jets, ICAO designator changed to MVP. ICAO callsign changed to Allstar. | USA | AVCODES |
| 7416 | PPJA | PIERZ, PHILIP J & ASSOCIATES | | | SCAC3 |
| 7417 | PPJO | PAPA JOE TRUCKING | | | SCAC4 |
| 7418 | PPK | Ramp 66 | Callsign: Pelican, | USA | AVCODES |
| 7419 | PPK | Ramp 66 | | | ICAO1 |
| 7420 | PPK | PIKES PEAK TOURS & CHARTERS INC | | | SCAC4 |
| 7421 | PPKC | PERFECT PAK COMPANY | | | SCAC3 |
| 7422 | PPKD | PRIORITY PACKAGE DELIVERY | | | SCAC3 |
| 7423 | PPKI | P & P TRUCKING | | | SCAC3 |
| 7424 | PPKN | PIPKIN, RALPH TRUCKING | | | SCAC3 |
| 7425 | PPKN | PROMPT TRUCKING | | | SCAC4 |
| 7426 | PPKO | POPKO TRUCKING CO INC | | | SCAC3 |
| 7427 | PPKQ | PASSPORT TRUCKING INC | | | SCAC4 |
| 7428 | PPKSBB | PPKS Bialsko Biala | | PL | TRAFFIC |
| 7429 | PPKWAR | PPKS w Warszawie | | PL | TRAFFIC |
| 7430 | PPKX | North American Car Corp. | 7/1937-4/1947 | | NAKINA |
| 7431 | PPKX | Palace Poultry Car Co. (Palace Live Poultry Car Co.) | 7/1930-7/1935 | | NAKINA |
| 7432 | PPKX | (North American Car Corp.) | Apr-38 | | NRHS |
| 7433 | PPKX | NORTH AMERICAN CAR CORP. [PALACE LIVE POULTRY CAR CO.] | | | PWRC |
| 7434 | PPL | Pluto Airlines LLC | IATA: PD, Callsign: Pluto Air, Ceased Operations | UAE | AVCODES |
| 7435 | PPL | Air Pegasus Pvt. Ltd. | IATA: OP, Callsign: Pegasus, Founded in 2014. Commenced operations on 12 April 2015. Ceased operations on 27 July 2016. | IND | AVCODES |
| 7436 | PPLA | PIERPOINT TRANS LINE INC | | | SCAC4 |
| 7437 | PPLB | PRECISION PALLET LLC | | | SCAC4 |
| 7438 | PPLC | PHILLIPS PIPE LINE COMPANY | | | SCAC3 |
| 7439 | PPLD | PRODUCER'S PETROLEUM LLC | | | SCAC4 |
| 7440 | PPLE | PRAIRIE PIRATES LTD | | | SCAC4 |
| 7441 | PPLJ | PAPPAS LOGISTICS INC | | | SCAC4 |
| 7442 | PPLL | PURPLE LINE HOLDING S A | | | SCAC3 |
| 7443 | PPLL | PIONEER PALLET & LUMBER LTD | | | SCAC4 |
| 7444 | PPLO | PEOPLES OIL | | | SCAC4 |
| 7445 | PPLOCK | Przedsiębiorstwo Komunikacji Samochodowej w Płocku | | PL | TRAFFIC |
| 7446 | PPLP | PINNACLE PROPANE LLC | | | SCAC4 |
| 7447 | PPLQ | PHANEUF, PIERRE LUC (PLP) INC | | | SCAC4 |
| 7448 | PPLR | POPLAR SCHOOLS | | | SCAC3 |
| 7449 | PPLS | PRIDE PLUS TRANSPORTATION | | | SCAC4 |
| 7450 | PPLT | PEOPLES TRANSPORT | | | SCAC3 |
| 7451 | PPLU | BERTSCHI AG | | CH | BIC |
| 7452 | PPLU | PER PLUS LOGISTICS B V | | | SCAC4 |
| 7453 | PPLV | PEREGRINE POINT LLC | | | SCAC4 |
| 7454 | PPLX | Pennsylvania Power & Light Co. | added 10/1964; 7/1965-7/2005 | | NAKINA |
| 7455 | PPLX | Pierce Pipe Line Co. (Pierce Petroleum Corp.) | 7/1930 | | NAKINA |
| 7456 | PPLX | Pennsylvania Power & Light Co. | 7/65-7/2000 | | NRHS |
| 7457 | PPLX | *PIERCE PETROLEUM CORP. [PIERCE PIPE LINE CO.] | | | PWRC |
| 7458 | PPLX | +PENNSYLVANIA POWER & LIGHT CO. | | | PWRC |
| 7459 | PPLX | Pennsylvania Power and Light | | | RSRV |
| 7460 | PPLX | PENNSYLVANIA POWER & LIGHT CO | | | SCAC3 |
| 7461 | PPLX | Pennsylvania Power & Light Co. | | USA | TRAFFIC |
| 7462 | PPLZ | PENNSYLVANIA POWER & LIGHT CO. | | | PWRC |
| 7463 | PPM | Pacific Pearl Airways Corporation | Callsign: Pacific Pearl, Founded in 2006. No operations since earlier 2015. | RP | AVCODES |
| 7464 | PPM | Pacific Pearl Airways | | | ICAO1 |
| 7465 | PPME | PARTES DE PLASTICO DE MEXICO SA DE | | | SCAC4 |
| 7466 | PPMF | POISSONNERIE PRO-MER SEAFOOD | | | SCAC4 |
| 7467 | PPMS | PIKES PEAK MOVING & STRGE | | | SCAC3 |
| 7468 | PPMS | PIKES PEAK MOVING & STORAGE | | | SCAC4 |
| 7469 | PPMT | Pomorskie Przedsiebiorstwo Mechanizno-Torowe Sp. Z o.o. | | PL | VKM |
| 7470 | PPNI | PRECISION PACKING & INSTALLATION | | | SCAC3 |
| 7471 | PPNR | P P & R TRUCKING COMPANY INC | | | SCAC3 |
| 7472 | PPNS | PP & S TRUCKING | | | SCAC3 |
| 7473 | PPNT | PAPIN, NICK TRUCKING | | | SCAC3 |
| 7474 | PPNV | PACIFIC PRIMATE NAVIGATION INC | | | SCAC4 |
| 7475 | PPNX | PCS Phosphate Co., Inc. | added 4/1999; 7/2000-7/2005 | | NAKINA |
| 7476 | PPNX | Pipestone Produce Co. (cars No. 6042-7563) (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 7477 | PPNX | Pipestone Produce Co. (cars No. 627-629) (American Refrigerator Transit Co.) | 7/1935 | | NAKINA |
| 7478 | PPNX | PCS Phosphate Co., Inc. | added 4/99; 7/2000 | | NRHS |
| 7479 | PPNX | PCS PHOSPHATE COMPANY | | | PWRC |
| 7480 | PPNX | PCS Phosphate | | | RSRV |
| 7481 | PPNX | PCS PHOSPHATE COMPANY INC | | | SCAC4 |
| 7482 | PPOC | PEPPER OIL COMPANY INC | | | SCAC4 |
| 7483 | PPOH | PRO/PLUS | | | SCAC3 |
| 7484 | PPOI | PACIFIC PORTS TRANSPORTATION INC | | | SCAC3 |
| 7485 | PPOI | PRAIRIE POLLINATING INC | | | SCAC4 |
| 7486 | PPOL | PRISM POLISH | | | SCAC4 |
| 7487 | PPOR | PRIORITY TRANSPORTATION INC | | | SCAC3 |
| 7488 | PPOT | P POT | | | SCAC3 |
| 7489 | PPPC | PERRY PETROLEUM PRODUCTS CARTAGE CO | | | SCAC3 |
| 7490 | PPPC | PAN PACIFIC PETROLEUM COMPANY INC | | | SCAC4 |
| 7491 | PPPE | PROTO PLUS TRANSPORT INC | | | SCAC4 |
| 7492 | PPPI | PET POULTRY PRODUCTS INC | | | SCAC3 |
| 7493 | PPPK | PUERTO RICO PACKERS, INC. | | | SCAC3 |
| 7494 | PPPK | PUERTO RICO PACKERS INC | | | SCAC4 |
| 7495 | PPPL | PORTAL PIPE LINE COMPANY | | | SCAC3 |
| 7496 | PPPO | POWER POOL PLUS | | | SCAC4 |
| 7497 | PPPP | POPS PIPE & SUPPLY | | | SCAC3 |
| 7498 | PPPP | PENNS PROFESSIONAL PACKING INC | | | SCAC4 |
| 7499 | PPPR | PETALUMA POULTRY PROCESSORS | | | SCAC3 |
| 7500 | PPPS | PERKS PIERCE PIVOTS | | | SCAC3 |
