| 1 | ORR | Operadora Turistica Aurora, S.A. de C.V. | Callsign: Turistica Aurora, | MEX | AVCODES |
| 2 | ORR | Operadora Turistica Aurora | | | ICAO1 |
| 3 | ORR | Osage R.R. | 1/1994; added 1/1996; eliminated 10/1996; 7/2000-7/2005 | | NAKINA |
| 4 | ORR | Osage R.R. | 1/94; added 1/96; eliminated 10/96; 7/2000 | | NRHS |
| 5 | ORR | OSAGE RAILROAD | | | PWRC |
| 6 | ORR | Osage Railroad | | | RSRV |
| 7 | ORRC | ORRICK TRANSPORTATION | | | SCAC3 |
| 8 | ORRC | OSMOSE RAIL ROAD SERVICES INC | | | SCAC4 |
| 9 | ORRG | OCEAN RAIL ROAD LOGISTICS INC | | | SCAC4 |
| 10 | ORRI | OMNI RESOURCE RECOVERY INC | | | SCAC4 |
| 11 | ORRK | ORROCK & SONS TRUCKING INC | | | SCAC4 |
| 12 | ORRQ | ORR TANK LINES | | | SCAC3 |
| 13 | ORRR | ORR, ROBERT B INC | | | SCAC3 |
| 14 | ORRS | ORRIS TRUCKING INC | | | SCAC3 |
| 15 | ORRS | ORR, SAMMY TRUCKING CO | | | SCAC4 |
| 16 | ORRV | ORR, VINCE TRUCKING INC | | | SCAC3 |
| 17 | ORRW | ORRWAY MOTOR SERVICE INC | | | SCAC3 |
| 18 | ORRX | Oregon Dept. of Transportation/Rail Division | added 10/2003; 7/2005; eliminated 1/2007 | | NAKINA |
| 19 | ORRX | OREGON DEPT. OF TRANSPORTATION RAIL DIVISION | | | PWRC |
