| 1 | RON | Air Nauru | IATA: ON, Callsign: Air Nauru, IATA Prefix: 123, Commenceds operation on 14 February 1970. Ceased operations on 18 December 2005. Relaunched as Nauru Air Corporation t/a Our Airline on 14 October 2006. Designator ON reinstated by IATA | NAU | AVCODES |
| 2 | RON | Nauru Air Corporation t/a Our Airline | IATA: ON, IATA Prefix: 123, Nauru Air Corporation t/a Nauru Airlines w.e.f. 01 August 2014. Name changed from Air Nauru on 14 October 2005. | NAU | AVCODES |
| 3 | RON | Nauru Air Corporation t/a Nauru Airlines | IATA: ON, IATA Prefix: 123, Name changed from Nauru Air Corporation t/a Our Airline w.e.f. 01 August 2014. | NAU | AVCODES |
| 4 | RON | Nauru Air Corporation | IATA: ON | | ICAO1 |
| 5 | RON | Our Airline | IATA: ON | | ICAO1 |
| 6 | RONA | RONTRA FREIGHT INC | | | SCAC4 |
| 7 | RONE | ROUNTREE TRUCKING COMPANY | | | SCAC3 |
| 8 | RONE | ROSENAU EQUIPMENT COMPANY INC | | | SCAC4 |
| 9 | RONE | Rail One S.p.A. | | IT | VKM |
| 10 | RONF | ROANE TRANSFER | | | SCAC3 |
| 11 | RONI | ROMANELLI & SON INC | | | SCAC4 |
| 12 | RONJ | ROGERS TRANSFER, INC | | | SCAC3 |
| 13 | RONK | RONNIES TRUCKING INC | | | SCAC4 |
| 14 | RONL | ROTRANSCO | | | SCAC3 |
| 15 | RONM | RONNOCO 1 INC | | | SCAC4 |
| 16 | RONN | RONE TRUCKING INC | | | SCAC3 |
| 17 | RONN | RONE TRUCKING INC | | | SCAC4 |
| 18 | RONO | RONS TOWING | | | SCAC3 |
| 19 | RONP | RONS PRODUCE INC | | | SCAC3 |
| 20 | RONP | ROLL ON TRANSPORTATION INC | | | SCAC4 |
| 21 | RONQ | RONEY DELIVERY SERVICE | | | SCAC3 |
| 22 | RONR | RONS TRANSPORT | | | SCAC3 |
| 23 | RONS | ROBERTS & SINGER | | | SCAC3 |
| 24 | RONS | ROBERTS & SINGER | | | SCAC4 |
| 25 | RONT | RONALDS TRAILER TRANSPORT | | | SCAC3 |
| 26 | RONU | RDON, INC. | | | SCAC3 |
| 27 | RONU | NAHSHOL TALLYING AND SUPERVISION | | | SCAC4 |
| 28 | RONW | ROWELL & WATSON CO INC | | | SCAC3 |
| 29 | RONX | MACQUARIE RAIL INC | | | SCAC4 |
