| 6401 | PNMN | PINE MARINE CO | | | SCAC4 |
| 6402 | PNMO | PENINSULA MOVING & STORAGE | | | SCAC3 |
| 6403 | PNMO | PRECISION MOVERS INC | | | SCAC4 |
| 6404 | PNMR | PENN-MAR OIL CO INC | | | SCAC4 |
| 6405 | PNMS | PATERSON, N M & SONS LTD | | | SCAC3 |
| 6406 | PNMT | PENN MARITIME INC | | | SCAC4 |
| 6407 | PNMV | PIONEER MOVERS INC | | | SCAC3 |
| 6408 | PNMW | P & M TRUCKING INC | | | SCAC3 |
| 6409 | PNMY | PACIFIC NORTHWEST MOVING (YUKON) LT | | | SCAC4 |
| 6410 | PNN | PRESCOTT & NORTHWESTERN RAILROAD CO. | | | PWRC |
| 6411 | PNNB | PENNCO BROKERAGE | | | SCAC3 |
| 6412 | PNNB | PENNER BUILDERS | | | SCAC4 |
| 6413 | PNNE | PINNACLE LOGISTICS INC | | | SCAC4 |
| 6414 | PNNG | PINNACLE TRANSPORTATION SYSTEMS | | | SCAC4 |
| 6415 | PNNI | PINNACLE TRANSPORT LLC | | | SCAC4 |
| 6416 | PNNK | P & N TRUCKING | | | SCAC3 |
| 6417 | PNNK | PENNICK, A J ENTERPRISES INC | | | SCAC4 |
| 6418 | PNNL | PINNACLE INTERNATIONAL TRANSPORTATI | | | SCAC3 |
| 6419 | PNNM | PENN MOUNTAIN TRUCKING CO INC | | | SCAC3 |
| 6420 | PNNP | PENN TRANSPORT INC | | | SCAC3 |
| 6421 | PNNR | PENNYRILE MOVING & STORAGE INC | | | SCAC3 |
| 6422 | PNNS | PENINSULA LOGISTICS INC | | | SCAC4 |
| 6423 | PNNT | PENN TERMINALS INC. | | | SCAC3 |
| 6424 | PNNV | PENNINE NAVIGATION COMPANY S.A. | | | SCAC3 |
| 6425 | PNNV | PENNINE E N E | | | SCAC4 |
| 6426 | PNNW | PENNWALT CORP | | | SCAC3 |
| 6427 | PNO | Panorama Aviation, Inc. | Callsign: Pano, | CDN | AVCODES |
| 6428 | PNOI | POOLE, NORM OIL INC | | | SCAC3 |
| 6429 | PNOL | PIONEER TRUCK LINE | | | SCAC3 |
| 6430 | PNOL | PIONEER TRUCK LINE | | | SCAC4 |
| 6431 | PNOM | PAN-OCEANS MARINE INC | | | SCAC3 |
| 6432 | PNOM | PARNON MARINE CO LTD | | | SCAC4 |
| 6433 | PNOQ | PINOLE VALLEY TRUCKING, INC | | | SCAC3 |
| 6434 | PNOQ | PINOLE VALLEY TRUCKING INC | | | SCAC4 |
| 6435 | PNOR | PRONTO AIR/SYSTEMS INC | | | SCAC3 |
| 6436 | PNOS | PACIFIC NORTHWEST SALVAGE | | | SCAC3 |
| 6437 | PNOU | P & O STRATH SERVICE | | | SCAC3 |
| 6438 | PNOU | P & O STRATH | | | SCAC4 |
| 6439 | PNOW | PACIFIC NORTHWEST CARRIERS INC | | | SCAC3 |
| 6440 | PNP | Pineapple Air | Callsign: Pineapple Air, | BS | AVCODES |
| 6441 | PNP | Pineapple Air | | | ICAO1 |
| 6442 | PNPA | PANALPINA INC | | | SCAC4 |
| 6443 | PNPD | P & P DELIVERIES INC | | | SCAC3 |
| 6444 | PNPE | PRECISION NATIONAL (PRECISION ELECTRIC) | | | PWRC |
| 6445 | PNPE | PENINSULAR PETROLEUM CO | | | SCAC3 |
| 6446 | PNPE | PNP GAMES | | | SCAC4 |
| 6447 | PNPF | PENN-PACIFIC INC | | | SCAC3 |
| 6448 | PNPH | PAY N PAK HOME CENTERS | | | SCAC3 |
| 6449 | PNPI | PACIFIC NURSERY POTS INC | | | SCAC3 |
| 6450 | PNPK | PENN PACKING CO | | | SCAC3 |
| 6451 | PNPL | PARK & PULL LEASING INC | | | SCAC3 |
| 6452 | PNPM | PENN PETROLEUM LLC | | | SCAC4 |
| 6453 | PNPN | P & P TRUCKING COMPANY INC | | | SCAC3 |
| 6454 | PNPP | PNP TRANSPORTATION INC | | | SCAC4 |
| 6455 | PNPQ | PAN-PACIFIC A/B | | | SCAC3 |
| 6456 | PNPR | PINE PRODUCTS TRANSPORT INC | | | SCAC3 |
| 6457 | PNPT | PHILLIPS & PHILLIPS TRUCKING CO | | | SCAC3 |
| 6458 | PNPV | POINT TO POINT AUTOMOTIVE CARRIERS | | | SCAC4 |
| 6459 | PNQ | Pacific National Queensland | | AUS | TRAFFIC |
| 6460 | PNQP | PNP EXPRESS INC | | | SCAC4 |
| 6461 | PNQR | PANORIA MARITIME INC. | | | SCAC3 |
| 6462 | PNQS | PANCHOS TRANSPORTATION SERVICES LLC | | | SCAC4 |
| 6463 | PNR | PAN AIR Lineas Aereas, S.A. | IATA: PV, Callsign: Skyjet, IATA designator changed from PA | E | AVCODES |
| 6464 | PNR | ASL Airlines Spain, S.A. | IATA: PV, Callsign: Skyjet, Designator PV recalled by IATA. Name changed from PAN AIR Lineas Aereas, S.A. 24 May 2016. IATA designator changed from PA | E | AVCODES |
| 6465 | PNR | ASL Airlines Spain, S.A. | Callsign: Skyjet, Designator PV recalled by IATA. Name changed from PAN AIR Lineas Aereas, S.A. 24 May 2016. IATA designator changed from PA | E | AVCODES |
| 6466 | PNR | PAN Air | IATA: PV | | ICAO1 |
| 6467 | PNR | Panhandle Northern R.R. Co. | 7/2000-7/2005 | | NAKINA |
| 6468 | PNR | Panhandle Northern R.R. Co. | Jul-00 | | NRHS |
| 6469 | PNR | PANHANDLE NORTHERN RAILROAD COMPANY | | | PWRC |
| 6470 | PNR | Panhandle Northern Railroad | | | RSRV |
| 6471 | PNR | PANHANDLE NORTHERN RAILROAD COMPANY | | | SCAC4 |
| 6472 | PNRA | PRIONEER TRUCKING & AGGREGATE INC | | | SCAC3 |
| 6473 | PNRB | PENA ROBLES, BERNARDO | | | SCAC4 |
| 6474 | PNRC | P & R TRUCKING CO | | | SCAC3 |
| 6475 | PNRE | PENQUIN REFRIGERATED EXPRESS | | | SCAC3 |
| 6476 | PNRF | PETERSEN, A REFRIGERATED TRANSPORT | | | SCAC3 |
| 6477 | PNRG | PIONEER GARDENS INC | | | SCAC4 |
| 6478 | PNRH | PENNER, HARLAN TRUCKING | | | SCAC3 |
| 6479 | PNRH | PENNER, HARLAN TRUCKING | | | SCAC4 |
| 6480 | PNRI | PIONEER TRANSPORTATION LTD | | | SCAC4 |
| 6481 | PNRJ | PAINE, J R & ASSOCIATES LTD | | | SCAC4 |
| 6482 | PNRK | P & R TANK LINES INC | | | SCAC3 |
| 6483 | PNRL | PENNER, LARRY ENTERPRISES INC | | | SCAC4 |
| 6484 | PNRM | PENNEBAKER READY MIX | | | SCAC3 |
| 6485 | PNRO | PENROC INC | | | SCAC3 |
| 6486 | PNRO | P N R HOLDINGS | | | SCAC4 |
| 6487 | PNRP | P & R TRANSPORTATION INC | | | SCAC3 |
| 6488 | PNRQ | PENSER TRANSPORTATION, INC | | | SCAC3 |
| 6489 | PNRQ | PENSER TRANSPORTATION INC | | | SCAC4 |
| 6490 | PNRR | PIONEER PETROLEUM CO | | | SCAC4 |
| 6491 | PNRS | POUNDS, RAYMOND A & SONS TRUCKING | | | SCAC3 |
| 6492 | PNRS | PNR TRANSPORT | | | SCAC4 |
| 6493 | PNRT | P & R TRANSPORTATION, LTD | | | SCAC3 |
| 6494 | PNRU | PANMAR LTD | | | SCAC4 |
| 6495 | PNRW | Piedmont and Northern Railway (Patriot Rail Corporation) | | | RSRV |
| 6496 | PNRW | P & R TRUCKING INC | | | SCAC3 |
| 6497 | PNRX | United States Atomic Energy Commission, Pittsburgh Naval Reactors Office | added 7/1970; eliminated 4/1974; 1/1975-1/1980 | | NAKINA |
| 6498 | PNRX | Pioneer Oil & Refining Co. | 7/1935-4/1947; 1/1950 (not listed) | | NAKINA |
| 6499 | PNRX | Pioneer Oil & Refining Co. | Apr-38 | | NRHS |
| 6500 | PNRX | United States Atomic Energy Commission, Pittsburgh Naval Reactors Office | added 7/70; eliminated 4/74; 1/75-1/80 | | NRHS |
