| 1 | PSU | Aeropeninsular, S.A. de C.V. | Callsign: Aeropeninsular, | MEX | AVCODES |
| 2 | PSU | PHS Premium Aviation and Handling Services, Sociedada Unipessoal Lda | Callsign: Premium, | P | AVCODES |
| 3 | PSUR | PACIFIC SOURCE INC | | | SCAC4 |
| 4 | PSUT | PETROSOURCE TRANSPORTATION | | | SCAC3 |
| 5 | PSUX | Pavers Supply Co. | added 4/1982; eliminated 10/1987 | | NAKINA |
| 6 | PSUX | Shippers' Car Line Corp. | 4/1947 (not listed) | | NAKINA |
| 7 | PSUX | Pennsylvania Sugar Co. | 7/1930-1/1946 | | NAKINA |
| 8 | PSUX | Pennsylvania Sugar Co. | Apr-38 | | NRHS |
| 9 | PSUX | Pavers Supply Co. | added 4/82; eliminated 10/87 | | NRHS |
| 10 | PSUX | *PENNSYLVANIA SUGAR CO. (SHIPPERS' CAR LINE CORP.) | | | PWRC |
| 11 | PSUX | *PAVERS SUPPLY CO. | | | PWRC |
