| 1 | PLI | Aeroperú | IATA: PL | | ICAO1 |
| 2 | PLIA | PROLIANCE INTERNATIONAL INC | | | SCAC4 |
| 3 | PLIB | PRESTIGE LIMOUSINE SERVICE INC | | | SCAC3 |
| 4 | PLIB | PERFECT LOGISTIC INC | | | SCAC4 |
| 5 | PLIC | PLEASANT INVESTMENT CORPORATION INC | | | SCAC3 |
| 6 | PLID | PALMER INDUSTRIES INC | | | SCAC3 |
| 7 | PLIE | PRAIRIE LINES INC | | | SCAC3 |
| 8 | PLII | PLI | | | SCAC4 |
| 9 | PLIK | PLUM LINE INC | | | SCAC3 |
| 10 | PLIK | PANTHER LINES | | | SCAC4 |
| 11 | PLIL | PALLINI SHIPPING CO LTD. | | | SCAC3 |
| 12 | PLIM | PLIMSOLL MARINE INC, | | | SCAC3 |
| 13 | PLIN | PLAINS PIPE LINE COMPANY | | | SCAC3 |
| 14 | PLIN | POULIN ENTERPRISES INC | | | SCAC4 |
| 15 | PLIP | PELICAN TRANSPORTATION INC | | | SCAC3 |
| 16 | PLIP | PELICAN TRANSPORTATION INC | | | SCAC4 |
| 17 | PLIQ | PASCO LINES INC | | | SCAC3 |
| 18 | PLIQ | PALM LITE ELECTRIC MOTORS INC | | | SCAC4 |
| 19 | PLIT | PALLET LOGISTICS OF AMERICA | | | SCAC4 |
| 20 | PLIU | PRUDENTIAL GRACE LINES, INC. | | | SCAC3 |
| 21 | PLIU | PIPELINE CONNECTORS INTERNATIONAL L | | | SCAC4 |
| 22 | PLIV | PETERSEN TRUCKING & LIVESTOCK | | | SCAC3 |
| 23 | PLIX | Polymont Plastics Corp. | added 4/1992; 1/1994-7/2000; eliminated 10/2003; 7/2005 (not listed) | | NAKINA |
| 24 | PLIX | Polysar Inc. | added 4/1981; eliminated 4/1992 | | NAKINA |
| 25 | PLIX | Polysar Inc. | added 4/81; eliminated 4/92 | | NRHS |
| 26 | PLIX | Polymont Plastics Corp. | added 4/92; 1/94-7/2000 | | NRHS |
| 27 | PLIX | POLYMONT PLASTICS CORPORATION (POLYSAR INC.) | | | PWRC |
| 28 | PLIX | Polymont Plastics Corporation | | | RSRV |
| 29 | PLIX | POLYMONT PLASTICS CORPORATION | | | SCAC4 |
| 30 | PLIZ | PELLEX INC. | | | PWRC |
| 31 | PLIZ | P and L Intermodal Corporation | | | RSRV |
| 32 | PLIZ | P & L INTERMODAL CORP | | | SCAC4 |
