| 1 | ROX | Roblex Aviation, Inc. | IATA: R9, Callsign: Roblex, On January 8, 2011 Roblex Aviation filed Chapter 11 bankruptcy. Ceased operations during July 2013. | USA | AVCODES |
| 2 | ROX | Roblex Aviation | | | ICAO1 |
| 3 | ROX | Atlantic Richfield Co. | added 7/1966; 10/1966-4/1970; eliminated 1/1972 | | NAKINA |
| 4 | ROX | Richfield Oil Corp. | 7/1937-7/1965; eliminated 7/1966 | | NAKINA |
| 5 | ROX | Richfield Oil Co. of California | 7/1930-7/1935 | | NAKINA |
| 6 | ROX | Richfield Oil Corporation | 4/38-7/65; eliminated 7/66 | | NRHS |
| 7 | ROX | Atlantic Richfield Co. | added 7/66; 10/66-4/70; eliminated 1/72 | | NRHS |
| 8 | ROX | ATLANTIC RICHFIELD CO. [RICHFIELD OIL CORP.] | | | PWRC |
| 9 | ROXB | ROXBURY TRUCKING CO INC | | | SCAC3 |
| 10 | ROXC | RIO EXPRESS (MX-374938) | | | SCAC4 |
| 11 | ROXE | ROAD ONE (1) EXPRESS INC | | | SCAC4 |
| 12 | ROXM | ROXMAN TRUCKING | | | SCAC4 |
| 13 | ROXN | R & O TRANSFER | | | SCAC4 |
| 14 | ROXS | ROCKET EXPRESS INTERNATIONAL | | | SCAC3 |
| 15 | ROXS | ROCKET EXPRESS COURIER | | | SCAC4 |
| 16 | ROXT | ROLLIN-ON EXPRESS TRUCKING INC | | | SCAC3 |
| 17 | ROXT | ROMEX TRANSPORT INC | | | SCAC4 |
| 18 | ROXU | EMCO MARINE LTD / CONTAINERS DPT. | | IL | BIC |
| 19 | ROXU | EMCO MARINE LTD / CONTAINERS DPT | | | SCAC4 |
| 20 | ROXX | Rocky Mountain Recycling, Inc. | added 4/2007; eliminated 7/2007; added 1/2009 | | NAKINA |
| 21 | ROXX | ROCKY MOUNTIAN RECYCLING, INC. | | | PWRC |
| 22 | ROXX | ROCKY MOUNTAIN RECYCLING INC | | | SCAC4 |
