| 5501 | PLTF | PICHARD, LINDA TRUCKING LLC | | | SCAC4 |
| 5502 | PLTG | PLATTS GARAGE INC | | | SCAC3 |
| 5503 | PLTG | P L T TRUCKING | | | SCAC4 |
| 5504 | PLTH | PRO LINE TRANSPORTATION CO | | | SCAC4 |
| 5505 | PLTI | PARNESS, LEONARD TRUCKING CORP | | | SCAC3 |
| 5506 | PLTJ | PELLICAN TRANS CO INC | | | SCAC3 |
| 5507 | PLTJ | POULTEX INC | | | SCAC4 |
| 5508 | PLTL | PLANT TRUCK LINE, INC | | | SCAC3 |
| 5509 | PLTM | PLEASANTON TRUCKING INC | | | SCAC3 |
| 5510 | PLTN | PELTON BROS TRANSPORT LIMITED | | | SCAC3 |
| 5511 | PLTO | P L TRUCKING CO | | | SCAC3 |
| 5512 | PLTO | POLTOM TRANSPORT | | | SCAC4 |
| 5513 | PLTP | POLAR TRANSPORT INC | | | SCAC3 |
| 5514 | PLTQ | PLATTE VALLEY FREIGHTWAYS INC | | | SCAC3 |
| 5515 | PLTR | PLATTSMOUTH TRANSFER | | | SCAC3 |
| 5516 | PLTS | PALANTIC STEAMSHIP CO INC | | | SCAC3 |
| 5517 | PLTS | PALLET SERVICES INC | | | SCAC4 |
| 5518 | PLTT | PLANTATION TRANSPORT COMPANY | | | SCAC3 |
| 5519 | PLTT | PLETT TRUCKING LTD | | | SCAC4 |
| 5520 | PLTU | PANEUROPA TRANSPORT GMBH | | D | BIC |
| 5521 | PLTU | TRANSTORE LTD | | | SCAC3 |
| 5522 | PLTV | PAUL TRUCKING, Amar Transportation, INC | | | SCAC3 |
| 5523 | PLTW | PRICE, LOUIS TRUCKING | | | SCAC3 |
| 5524 | PLTW | PLENTYWOOD ELECTRIC | | | SCAC4 |
| 5525 | PLTX | Clearwater Paper Corp. | added 4/2009 | | NAKINA |
| 5526 | PLTX | Potlatch Forest Products Corp. | added 7/2006; eliminated 4/2009 | | NAKINA |
| 5527 | PLTX | Potlatch Corp. | 7/2005 (not listed) | | NAKINA |
| 5528 | PLTX | POTLACH FOREST PRODUCTS CORP. | | | PWRC |
| 5529 | PLTX | POTLATCH FOREST PRODUCTS CORP | | | SCAC4 |
| 5530 | PLU | Pilatus PC-12 Center de Mexico, S.A. de C.V. | Callsign: Pilatus Mexico, | MEX | AVCODES |
| 5531 | PLU | Pilatus PC-12 Center De Mexico | | | ICAO1 |
| 5532 | PLU | Pacific Lumber | Real: PL | USA | TRAFFIC |
| 5533 | PLUA | PANDA LOGISTICS USA INC | | | SCAC4 |
| 5534 | PLUB | PARMAN ENERGY CORP | | | SCAC4 |
| 5535 | PLUC | PLUM CITY FEED MILL | | | SCAC3 |
| 5536 | PLUD | PORT LAUDANIA INC DANIA FL | | | SCAC3 |
| 5537 | PLUI | PALUMBO USA INC. | | | SCAC3 |
| 5538 | PLUI | PALUMBO USA INC. | | | SCAC4 |
| 5539 | PLUM | PLUMB, J G | | | SCAC3 |
| 5540 | PLUN | PLUNKETT MOTOR FREIGHT, INC | | | SCAC3 |
| 5541 | PLUN | PLUNKETT MOTOR FREIGHT, INC | | | SCAC4 |
| 5542 | PLUN | UAB PIungės AP | | LT | TRAFFIC |
| 5543 | PLUO | PLUTO TANKERS, INC. | | | SCAC3 |
| 5544 | PLUP | PETROLEUM TRANSPORT INC | | | SCAC3 |
| 5545 | PLUP | PRUETT, LUPE | | | SCAC4 |
| 5546 | PLUR | PLUMAS ROCK INC | | | SCAC3 |
| 5547 | PLUS | PLUS ENTERPRISES INC | | | SCAC3 |
| 5548 | PLUT | PENALUNA TRANSFER INC | | | SCAC3 |
| 5549 | PLUX | The Plusar Equipment Corp. | 7/2000 (not listed) | | NAKINA |
| 5550 | PLUX | The Plusar Equipment Corp. | Jul-00 | | NRHS |
| 5551 | PLUX | PLUSAR EQUIPMENT CORP. | | | PWRC |
| 5552 | PLUX | Pulser Equipment Corporation | | | RSRV |
| 5553 | PLUY | PLUS TRANSPORTATION SYSTEMS INC | | | SCAC3 |
| 5554 | PLV | Perla Airlines, C.A. | Callsign: Perla, | YV | AVCODES |
| 5555 | PLVB | PTS LOGISTICS SERVICES INC | | | SCAC4 |
| 5556 | PLVC | POLOVIC TRANSPORT CO | | | SCAC3 |
| 5557 | PLVE | PRICE-LES TRAVEL SERVICE INC | | | SCAC3 |
| 5558 | PLVL | PLATTE VALLEY TRUCKING | | | SCAC3 |
| 5559 | PLVN | PILGRIM VAN LINES LLC | | | SCAC4 |
| 5560 | PLVQ | PENLAND, VON L | | | SCAC3 |
| 5561 | PLVS | PLAYGROUND VAN & STROAGE | | | SCAC3 |
| 5562 | PLVT | PLATTE VALLEY TRANSPORT CO | | | SCAC3 |
| 5563 | PLVT | PLAINVIEW TRANSPORTATION SERVICES L | | | SCAC4 |
| 5564 | PLVU | CONTAINER MANAGERS LTD. | | | SCAC3 |
| 5565 | PLVU | CP SHIPS | | | SCAC4 |
| 5566 | PLW | PL&W R.R., Inc. | added 10/1993; added 1/1994; eliminated 1/1996; 7/2000-7/2005 | | NAKINA |
| 5567 | PLW | Pittsburgh, Lisbon & Western R.R. | 4/1938-1/1952 | | NAKINA |
| 5568 | PLW | Pittsburgh, Lisbon & Western R.R. | 4/38-1/52 | | NRHS |
| 5569 | PLW | PL&W R.R., Inc. | added 10/93; added 1/94; eliminated 1/96; 7/2000 | | NRHS |
| 5570 | PLW | PL&W RAILROAD CO., INC. {PITTSBURGH, LISBON & WESTERN RAILROAD CO.] | | | PWRC |
| 5571 | PLW | Pittsburgh, Lisbon & Western Railroad (PL&W Railroad) | | | RSRV |
| 5572 | PLWG | POLLYWOG TRANSPORT INC | | | SCAC3 |
| 5573 | PLWG | POLLYWOG TRANSPORT INC | | | SCAC4 |
| 5574 | PLWH | PALMER WAREHOUSE & TRANSFER CO INC | | | SCAC3 |
| 5575 | PLWJ | PLUMLY, W J INC | | | SCAC3 |
| 5576 | PLWM | PARK LAKE WELDING AND MFG LTD | | | SCAC4 |
| 5577 | PLWO | PLASTIC CONTAINERS TRANSPORT | | | SCAC3 |
| 5578 | PLWQ | PLEASANT WAY VAN & STORAGE | | | SCAC3 |
| 5579 | PLWU | INSPEKTORAT WSPARCIA SZ U.L DWERNICKIEGO 1 | | PL | BIC |
| 5580 | PLWU | DOWODZTWO WOJSK LADOWYCH | | | SCAC4 |
| 5581 | PLWX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 5582 | PLWX | General Electric Railcar Services Corp. | added 10/1992; 1/1994; eliminated 1/2000 | | NAKINA |
| 5583 | PLWX | Itel Rail Corp. | added 1/1990; eliminated 10/1992 | | NAKINA |
| 5584 | PLWX | Pullman Leasing Co. | added 4/1981; eliminated 1/1990 | | NAKINA |
| 5585 | PLWX | Pullman Leasing Co., a Subsidiary of Pullman Inc. | eliminated 1/1990 | | NAKINA |
| 5586 | PLWX | Pullman Leasing Co., a Subsidiary of Pullman Inc. | eliminated 1/90 | | NRHS |
| 5587 | PLWX | Pullman Leasing Co. | added 4/81; eliminated 1/90 | | NRHS |
| 5588 | PLWX | Itel Rail Corp. | added 1/90; eliminated 10/92 | | NRHS |
| 5589 | PLWX | General Electric Railcar Services Corp. | added 10/92; 1/94; eliminated 1/2000 | | NRHS |
| 5590 | PLWX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 5591 | PLWX | *PL&W RAILROAD CO., INC. {PITTSBURGH, LISBON & WESTERN RAILROAD CO.] | | | PWRC |
| 5592 | PLWX | +(NATX) GENERAL ELECTRIC RAIL SERVICES CORP. [ITEL RAIL CORP.; PULLMAN LEASING CO.] | | | PWRC |
| 5593 | PLWX | Pullman Leasing Co. (GE Capital Railcar Services) | | | RSRV |
| 5594 | PLWX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 5595 | PLX | Pool Aviation | | GB | AVCODES |
| 5596 | PLX | Pool Aviation | | | ICAO1 |
| 5597 | PLXA | PRISSEL TRANSPORT LLC | | | SCAC4 |
| 5598 | PLXB | P AND L EXPRESS INC | | | SCAC4 |
| 5599 | PLXC | PLYMOUTH TAXI COMPANY | | | SCAC3 |
| 5600 | PLXG | PROEX LOGISTICS INC | | | SCAC4 |
