| 1 | ROI | Aviones de Oriente, C.A. (AVIOR) | IATA: 3B, Callsign: Avior, Designator 3B reinstated by IATA | YV | AVCODES |
| 2 | ROI | Aviones de Oriente, C.A. (AVIOR) | IATA: 9V, Callsign: Avior, IATA Prefix: 742, Designator 3B recalled by IATA | YV | AVCODES |
| 3 | ROI | Avior Airlines | | | ICAO1 |
| 4 | ROIF | ROI RECREATION OUTFITTERS INC | | | SCAC4 |
| 5 | ROIH | RAMSEY OIL | | | SCAC4 |
| 6 | ROII | RADO INTERNATIONAL INC | | | SCAC4 |
| 7 | ROIL | RADIANT OIL C | | | SCAC3 |
| 8 | ROIN | ROSENS INC | | | SCAC3 |
| 9 | ROIN | ROSENS INC | | | SCAC4 |
| 10 | ROIO | REBEL OIL CO INC | | | SCAC4 |
| 11 | ROIP | ROCHESTER INDEPENDENT PACKER, INC | | | SCAC3 |
| 12 | ROIQ | ROGERS, A G INC | | | SCAC3 |
| 13 | ROIR | ROAD ISLAND RED | | | SCAC3 |
| 14 | ROIR | ROMAN IRIBE, OSCAR | | | SCAC4 |
| 15 | ROIT | ROBBINS TRANSPORT INC | | | SCAC3 |
| 16 | ROIX | Shintech Inc. | added 10/1974; 1/1975-7/2000; eliminated 4/2001; 7/2005 (not listed) | | NAKINA |
| 17 | ROIX | Shintech Inc. | added 10/74; 1/75-7/2000; eliminated 4/2001 | | NRHS |
| 18 | ROIX | SHINTECH INC | | | PWRC |
| 19 | ROIX | Shintech | | | RSRV |
| 20 | ROIX | SHINTECH INC | | | SCAC4 |
