| 1 | ORC | Air Cordial Limited | Callsign: Cordiale, | GB | AVCODES |
| 2 | ORC | Oriental Air Bridge Co. Ltd. | IATA: OC, Callsign: Oriental Bridge, IATA designator changed from O3. ICAO Designator changed to NGK. | J | AVCODES |
| 3 | ORC | OGEECHEE RAILROAD CO. | | | PWRC |
| 4 | ORC | OGEECHEE RAILROAD COMPANY | | | SCAC4 |
| 5 | ORC | Oriental Air Bridge | | J | TRAFFIC |
| 6 | ORCA | ORCAS ISLAND FREIGHT LINES, INC | | | SCAC3 |
| 7 | ORCA | ORCAS ISLAND FREIGHT LINES INC | | | SCAC4 |
| 8 | ORCD | ORCHARD TRANSPORT LTD | | | SCAC3 |
| 9 | ORCD | ORCHARD TRANSPORT LTD | | | SCAC4 |
| 10 | ORCF | ORCHARD HILL FARMS INC | | | SCAC4 |
| 11 | ORCK | O R TRUCKING | | | SCAC3 |
| 12 | ORCL | ORACLE TRANSPORT INC | | | SCAC4 |
| 13 | ORCN | OIL RE-REFINING CO INC | | | SCAC4 |
| 14 | ORCO | OHIO RIVER COMPANY, THE | | | SCAC3 |
| 15 | ORCQ | ORICA LINES | | | SCAC3 |
| 16 | ORCS | ORCAL TRANSPORT SERVICES INCORPORAT | | | SCAC3 |
| 17 | ORCT | ORILLIA CITY TRUCKLINES LTD | | | SCAC3 |
| 18 | ORCU | ORCA CONTAINER ASSET MANAGEMENT | | ZA | BIC |
| 19 | ORCU | BSL TRANSPORT | | | PWRC |
| 20 | ORCU | BSL Transport | | | RSRV |
| 21 | ORCU | ORCA CONTAINER ASSET MANAGEMENT | | | SCAC4 |
| 22 | ORCX | Oklahoma Refining Co. | 7/1937-4/1938 | | NAKINA |
| 23 | ORCX | The Neatesfoot Oil Refineries Corp. | 7/1935 | | NAKINA |
| 24 | ORCX | Oklahoma Refining Co. | Apr-38 | | NRHS |
| 25 | ORCX | OKLAHOMA REFINING CO. | | | PWRC |
| 26 | ORCZ | OHIO RIVER COMPANY | | | PWRC |
