| 1 | ORS | Action Air S.r.l. | Callsign: Aviation Service, | I | AVCODES |
| 2 | ORS | Action Air | | | ICAO1 |
| 3 | ORSA | ORSA-MAGGIORE TRANSPORTATION | | | SCAC4 |
| 4 | ORSA | Orsatåg AB | 1998 - 2003 | S | TRAFFIC |
| 5 | Orsatåg | Orsatåg AB | 1998 - 2003 | S | svenska-lok.se |
| 6 | ORSC | ORSCHELN CO | | | SCAC3 |
| 7 | ORSE | O'ROURKE SALES | | | SCAC4 |
| 8 | ORSG | ON THE ROAD SALES AGENTS | | | SCAC4 |
| 9 | ORSH | ONLINE ROPE STORE, THE | | | SCAC4 |
| 10 | ORSI | OROSI TRUCKING INC | | | SCAC3 |
| 11 | ORSI | ORANGE RECYCLING SERVICES INC | | | SCAC4 |
| 12 | ÖrSJ | Örebro - Svartå | 1897 - 1907 | S | svenska-lok.se |
| 13 | ORSL | ORINOGO SHIPPING CO LTD | | | SCAC3 |
| 14 | ORSL | ORINOCO SHIPPING CO LTD | | | SCAC4 |
| 15 | ORSR | ORIENT SHIPPING ROTTERDAM | | | SCAC4 |
| 16 | ORSX | Oxweld Railroad Service Co. | 1/1941-4/1961 (not listed) | | NAKINA |
| 17 | ORSX | Oxweld Railroad Service Co. | 1/52-4/61 | | NRHS |
| 18 | ORSX | OXWELD RAILROAD SERVICE CO. | | | PWRC |
