| 1 | PLA | Polynesian Air-Ways | Callsign: Polyair, | USA | AVCODES |
| 2 | PLA | Polynesian Air-Ways | | | ICAO1 |
| 3 | PLA | NILES CANYON RAILWAY [PACIFIC LOCOMOTIVE ASSOCIATION] | | | PWRC |
| 4 | PLA | People's Liberation Army | | PRC | TRAFFIC |
| 5 | PLA | Franz Plasser Vermietung von Bahnbaumaschinen GmbH | | AT | VKM |
| 6 | PLAA | PLAISANT, A TRUCKING INC | | | SCAC3 |
| 7 | PLAAF | People's Liberation Army Air Force | | PRC | TRAFFIC |
| 8 | PLAB | PEARSON LOGISTICS CORPORATION | | | SCAC4 |
| 9 | PLAC | PLAZA TRUCKING CO | | | SCAC3 |
| 10 | PLAD | PRAIRIE LAND EXPRESS | | | SCAC3 |
| 11 | PLAD | PRAIRIE LAND EXPRESS | | | SCAC4 |
| 12 | PLAF | PLANTATION FOODS INC | | | SCAC3 |
| 13 | PLAG | PLATZ, GORDON | | | SCAC3 |
| 14 | PLAG | Panlog AG | | CH | VKM |
| 15 | PLAH | PLANTECH CONTROL SYSTEMS INC | | | SCAC4 |
| 16 | PLAI | PLAINS TRUCKING | | | SCAC4 |
| 17 | PLAJ | PENN, LAWRENCE A JR TRUCKING | | | SCAC3 |
| 18 | PLAK | PEMBINA COONY LTD | | | SCAC4 |
| 19 | PLAL | PLATTE TRUCK LINE | | | SCAC3 |
| 20 | PLAL | PEOPLE & LOGISTICS AMERICA INC | | | SCAC4 |
| 21 | PLAM | PLAMONDON TRANSPORT, INC | | | SCAC3 |
| 22 | PLAM | PLAMONDON TRANSPORT, INC | | | SCAC4 |
| 23 | PLAN | PLANTT BROTHERS TRUCKING | | | SCAC4 |
| 24 | PLAO | PLATO AGENCIES INC. | | | SCAC3 |
| 25 | PLAO | P & L LOGISTICS INC | | | SCAC4 |
| 26 | PLAP | PORTLAND PIPE LINE CORPORATION | | | SCAC3 |
| 27 | PLAP | PORTLAND PIPE LINE CORP | | | SCAC4 |
| 28 | PLAR | POLAR EXPRESS INC | | | SCAC3 |
| 29 | PLAS | PLAINS TRANSPORTATION INCORPORATED | | | SCAC4 |
| 30 | PLAS | Plasmor Ltd | | UK | VKM |
| 31 | PLAT | PLATTER, LEE C | | | SCAC3 |
| 32 | PLATA | P.H.U. Lokomotiv | | PL | VKM |
| 33 | PLAU | POLAR CONTAINER SPECIAL EQUIPMENT LIMITED | | PRC | BIC |
| 34 | PLAU | | City: Plauen | D | TRAFFIC |
| 35 | PLAV | PLATEAU VALLEY MOTOR FREIGHT | | | SCAC3 |
| 36 | PLAV | PINE LINE RACING | | | SCAC4 |
| 37 | PLAW | PLATIN ARROW MARINE LTD | | | SCAC3 |
| 38 | PLAX | PORT OF LOS ANGELES | | | PWRC |
| 39 | PLAXTON | Plaxton | | GB | TRAFFIC |
