| 1 | ORM | Orel State Air Enterprise | Callsign: Orprise, | RUS | AVCODES |
| 2 | ORM | Orel State Air Enterprise | | | ICAO1 |
| 3 | ORMA | ORIENTAL MASTER INTERN | | | SCAC3 |
| 4 | ORMA | ORIENTAL MASTER INTERN | | | SCAC4 |
| 5 | ORMB | ORMSBY INTERNATIONAL CUSTOMHOUSE BR | | | SCAC3 |
| 6 | ORMB | OREMBA LIVESTOCK, KELLY HAULING LTD | | | SCAC4 |
| 7 | ORME | ORMES TRANSPORTATION INC | | | SCAC3 |
| 8 | ORME | Eisenbahnausrüstung und Zubehör mbH | | DE | VKM |
| 9 | ORMG | O/R MESSENGER SERVICE INC | | | SCAC3 |
| 10 | ORML | OCEANREIGN MARINE LIMITED | | | SCAC3 |
| 11 | ORMM | OMEGA RIGGING & MACHINERY MOVING IN | | | SCAC4 |
| 12 | ORMQ | ORR, LEONARD MOTOR SERVICE INC | | | SCAC3 |
| 13 | ORMX | D.L. Orme | 1/1952-10/1966; eliminated 1/1970 | | NAKINA |
| 14 | ORMX | D.L. Orme | 1/52-10/66; eliminated 1/70 | | NRHS |
| 15 | ORMX | *D. L. ORME | | | PWRC |
| 16 | ORMX | *OHIO RAILWAY MUSEUM | | | PWRC |
| 17 | ORMX | ORME, D L | | | SCAC3 |
| 18 | ORMX | OHIO RAILWAY MUSEUM | | | SCAC4 |
