| 1 | PSW | Pskov State Aviation Enterprise | Callsign: Pskovavia, | RUS | AVCODES |
| 2 | PSW | Pskovavia | | | ICAO1 |
| 3 | PSWC | PENINSULA SAW COMPANY SALES AND SER | | | SCAC4 |
| 4 | PSWD | PASSWORD TRUCKING LLC | | | SCAC4 |
| 5 | PSWG | PEAK SWINE GENETICS INC | | | SCAC4 |
| 6 | PSWP | PORTLAND STONE WARE PACKAGING INC | | | SCAC3 |
| 7 | PSWP | PORTLAND STONE WARE PACKAGING INC | | | SCAC4 |
| 8 | PSWR | Pennsylvania Southwestern R.R. Inc. | added 10/2003; eliminated 4/2004; added 4/2005; 7/2005 | | NAKINA |
| 9 | PSWR | PENNSYLVANIA SOUTHWESTERN RAILROAD INC. | | | PWRC |
| 10 | PSWR | PENNSYLVANI | | | SCAC4 |
| 11 | PSWS | PITTS & SONS WRECKER SERVICE | | | SCAC3 |
