| Carrier Code | Carrier Name |
| PTGL | PORTUGUESE LINE |
| PTIU | PAUWELS TRAFO LTD |
| PTKL | PETROKLAV INC C/O KLAVENESS SHIPPING A/S |
| PTLU | PACIFIC ISLANDS TRANSPORT LINE |
| PTOB | PACIFIC TOWBOAT & SALVAGE CO |
| PTOR | PACTOL RIVER |
| PTRU | PETROLITE CORPORATION |
| PTSM | PORT OF ST MARYS |
| PTWS | PASADENA TOWING SERVICE INC |
| PUAM | PUNDA MERCANTILE INC |
| PUBK | PURBECK CO S A |
| PUCG | PUERTO RICO SUN OIL CO SHIPS AGENCY |
| PUKL | PRISCO (UK) LTD |
| PURV | PURVIS MARINE LIMITED |
| PUSG | PURPLE SHIPPING COMPANY LIMITED |
