| 4401 | PIRI | PIRIE MOTOR FREIGHT INC | | | SCAC3 |
| 4402 | PIRM | PLYMOUTH IRON & METAL INC | | | SCAC3 |
| 4403 | PIRO | PIROSMANI SHIPPING CO LTD | | | SCAC3 |
| 4404 | PIRP | PIONEER PLASTICS | | | SCAC3 |
| 4405 | PIRP | PIONEER PACKAGING | | | SCAC4 |
| 4406 | PIRQ | PEEL, IRENE | | | SCAC4 |
| 4407 | PIRR | PIONEER TOURS INC | | | SCAC3 |
| 4408 | PIRS | PRECISION TRANSPORT INC | | | SCAC4 |
| 4409 | PIRT | PIROLLO TRANSPORT CO INC | | | SCAC3 |
| 4410 | PIRU | PROVINI OF IRAN, S.A. | | | SCAC3 |
| 4411 | PIS | Parsis | Callsign: Parsis, | IR | AVCODES |
| 4412 | PISC | PIONEER STORAGE COMPANY | | | SCAC3 |
| 4413 | PISC | PACIFICO INDUSTRIAL SA DE CV | | | SCAC4 |
| 4414 | PISF | PISTOLE FARMS | | | SCAC4 |
| 4415 | PISK | PETERS, ISACK | | | SCAC4 |
| 4416 | PISL | PIERSON, SHELTON | | | SCAC3 |
| 4417 | PISM | PRISM SYSTEMS INC | | | SCAC3 |
| 4418 | PISN | PIKE & SONS MOVERS | | | SCAC3 |
| 4419 | PISO | PIERCE, SOLOMON | | | SCAC3 |
| 4420 | PISP | PALM ISLAND SHIPPING | | | SCAC3 |
| 4421 | PIST | PISTORESI, NELLO & SON, INC | | | SCAC3 |
| 4422 | PIST | PISTON TRUCKING | | | SCAC4 |
| 4423 | PISV | PIASECKI SERVICE INC | | | SCAC3 |
| 4424 | PIT | Panair S.p.A. | IATA: P2, Callsign: Panairfly, Name changed from Panair - Comagnia Aerea Mediterranea Srl. Name changed from Panair - Comagnia Aerea Meridiaonale Srl | I | AVCODES |
| 4425 | PIT | Panair International Srl | Name changed to Panair - Comagnia Aerea Mediterranea | I | AVCODES |
| 4426 | PITA | PITTS, ALAN TRUCKING | | | SCAC3 |
| 4427 | PITC | PIERCETON TRUCKING COMPANY, INC | | | SCAC3 |
| 4428 | PITD | PITT-OHIO EXPRESS, INC | | | SCAC3 |
| 4429 | PITD | PITT-OHIO EXPRESS | | | SCAC4 |
| 4430 | PITE | PIRIL INSAAT TICARET VE BILGISAYAR | | | SCAC4 |
| 4431 | PITER | Piteravto LLC | | RUS | TRAFFIC |
| 4432 | PITF | PITCHFORD ELEVATOR CO | | | SCAC4 |
| 4433 | PITG | PITTSBURGH TRANSFER & STORAGE COMPA | | | SCAC3 |
| 4434 | PITH | PIER 333 INC | | | SCAC3 |
| 4435 | PITI | PITITI TRANSPORTATION | | | SCAC4 |
| 4436 | PITJ | PILGRIM TRUCKING COMPANY | | | SCAC3 |
| 4437 | PITJ | PILGRIM TRUCKING CO INC | | | SCAC4 |
| 4438 | PITK | PIANA TRUCKING COMPANY | | | SCAC4 |
| 4439 | PITL | PIPERS TRANSFER | | | SCAC3 |
| 4440 | PITO | PIPELINE TRUCKING COMPANY, INC | | | SCAC3 |
| 4441 | PITO | PORTLAND INTERMODAL TRANSPORT SERVI | | | SCAC4 |
| 4442 | PITQ | PITT, WILLIAM CO INC | | | SCAC3 |
| 4443 | PITS | PIER TRANSPORTATION INC | | | SCAC4 |
| 4444 | PITT | PITT COUNTY TRANSPORTATION COMPANY, | | | SCAC3 |
| 4445 | PITT | Pittsburg Coal Company | | USA | TRAFFIC |
| 4446 | PITTSBURGH | | City: Pittsburgh | USA | TRAFFIC |
| 4447 | PITU | PITERS AG, | | | SCAC3 |
| 4448 | PITU | POLITRANSPOOL SA | | | SCAC4 |
| 4449 | PITW | PIONEER TRANSFER AND WAREHOUSE COMP | | | SCAC3 |
| 4450 | PITW | PIT PACIFIC INVESTMENT & TRADING GM | | | SCAC4 |
| 4451 | PIU | 43 Air School | Callsign: Prima, | ZA | AVCODES |
| 4452 | PIUT | PIONEER TRANSPORTATION INC | | | SCAC3 |
| 4453 | PIV | Sokol, Joint-Stock Aviation Company | Callsign: Aerosokol, | RUS | AVCODES |
| 4454 | PIV | Sokol | | | ICAO1 |
| 4455 | PIVA | PIONEER VAN & STORAGE CO | | | SCAC3 |
| 4456 | PIVA | PIONEER VAN & STORAGE CO | | | SCAC4 |
| 4457 | PIVI | PALMDALE INVESTMENTS INC | | | SCAC4 |
| 4458 | PIVL | PIERCE VAN LINES | | | SCAC3 |
| 4459 | PIVQ | PIEDMONT VAN AND STORAGE CO | | | SCAC3 |
| 4460 | PIVQ | PIEDMONT VAN AND STORAGE CO | | | SCAC4 |
| 4461 | PIVT | PIV TRUCKING LTL | | | SCAC4 |
| 4462 | PIVW | PINEVIEW TRANSPORT INC | | | SCAC3 |
| 4463 | PIVX | The Andrews Companies, LLC | added 7/2007 | | NAKINA |
| 4464 | PIVX | Pivotal Enterprises Corp. | 7/2000 (not listed); added 7/2002; 7/2005; eliminated 7/2007 | | NAKINA |
| 4465 | PIVX | Pivotal Enterprises Corp. | Jul-00 | | NRHS |
| 4466 | PIVX | *PIVOTAL ENTERPRISES CORP. | | | PWRC |
| 4467 | PIVX | +THE ANDREWS COMPANIES, LLC | | | PWRC |
| 4468 | PIVX | Pivotal Enterprises Corporation | | | RSRV |
| 4469 | PIVX | ANDREWS COMPANIES LLC, THE | | | SCAC4 |
| 4470 | PIW | Panama International Air, S.A. | | PA | AVCODES |
| 4471 | PIWC | PITTS, W C CONSTRUCTION CO INC | | | SCAC3 |
| 4472 | PIWC | PRESQUE ISLE WINE CELLARS INC | | | SCAC4 |
| 4473 | PIWD | PILGRIM, W D TRUCKING | | | SCAC4 |
| 4474 | PIWI | PELHAMS INDUSTRIAL WAREHOUSES INC | | | SCAC3 |
| 4475 | PIWI | PELHAMS INDUSTRIAL WAREHOUSES INC | | | SCAC4 |
| 4476 | PIWQ | PIEDMONT INTERSTATE WAREHOUSE SYSTE | | | SCAC3 |
| 4477 | PIWT | PINEWOOD TRANSPORT INC | | | SCAC3 |
| 4478 | PIX | Philippine International Airways Corporation | Callsign: Philinter, | RP | AVCODES |
| 4479 | PIX | Metropix Ltd | | GB | AVCODES |
| 4480 | PIX | Metropix UK | | | ICAO1 |
| 4481 | PIX | Publicker Industries, Inc. | 4/1947-1/1952; eliminated 4/1953 | | NAKINA |
| 4482 | PIX | Publicker Industries, Inc. | Jan-52 | | NRHS |
| 4483 | PIX | PUBLICKER INDUSTRIES, INC. | | | PWRC |
| 4484 | PIXL | PIX LINE | | | SCAC3 |
| 4485 | PIXL | PIX LINE | | | SCAC4 |
| 4486 | PIXT | PIXLEY TRANSPORTATION | | | SCAC3 |
| 4487 | PIZ | Pizaz European | Callsign: Pizaz, | GB | AVCODES |
| 4488 | PIZ | PFIZER INC. | | | PWRC |
| 4489 | PIZA | PIAZZA, SAMUEL J & SON INC | | | SCAC3 |
| 4490 | PIZA | PIZANA CABRERA, JESUS | | | SCAC4 |
| 4491 | PIZT | PIAZZA TRUCKING INC | | | SCAC3 |
| 4492 | PJ | Air St. Pierre | ICAO: SPM, IATA Prefix: 638, Name changed to Air Saint Pierre | SPM | AVCODES |
| 4493 | PJ | Apollo Airlines, S.A. | ICAO: AOA, Callsign: Apollo Air, Ceased operations during 1997. | GR | AVCODES |
| 4494 | PJ | Peregrine Air Services Ltd. | | GB | AVCODES |
| 4495 | PJ | Polar-Air O/Y | Callsign: Polarair, | S | AVCODES |
| 4496 | PJ | Air Saint Pierre | ICAO: SPM, IATA Prefix: 638, Name changed from Air St. Pierre | SPM | AVCODES |
| 4497 | PJA | Private Jet Management, Inc | Callsign: Private Flight, | USA | AVCODES |
| 4498 | PJA | Private Jet Management | | | ICAO1 |
| 4499 | PJAC | P J TRAILERS CANADA INC | | | SCAC4 |
| 4500 | PJAE | PITTSBURGH-JOHNSTOWN-ALTOONA EXPRES | | | SCAC3 |
