| 1 | ROK | National Airlines | Callsign: Red Rock, Founded in 1998. Commenced operations on 27 May 1999. Ceased opertions on 06 November 2002. | USA | AVCODES |
| 2 | ROK | Red Rock Flight School | Callsign: Red Rock, | USA | AVCODES |
| 3 | ROK | National Airlines | IATA: N7 | | ICAO1 |
| 4 | ROKA | ROKA | | | SCAC3 |
| 5 | ROKB | ROYAL TRUCKING | | | SCAC4 |
| 6 | ROKC | ROCKY MOUNTAIN TRUCKING | | | SCAC3 |
| 7 | ROKC | R O C TRUCKING INC | | | SCAC4 |
| 8 | ROKE | ROANOKE OIL DISTRIBUTORS INC | | | SCAC4 |
| 9 | ROKEM | KEMWATER CRISTAL SRL | | RO | VKM |
| 10 | ROKG | ROYAL CITY TRUCKING | | | SCAC4 |
| 11 | ROKL | ROK TRUCK LINES INC | | | SCAC3 |
| 12 | ROKL | ROK LOGISTICS | | | SCAC4 |
| 13 | ROKN | RAST, OSCAR TRUCKING CO | | | SCAC3 |
| 14 | ROKQ | ROARK TRUCKING CO | | | SCAC3 |
| 15 | ROKS | ROBINSON, KARL S TRUCKING COMPANY I | | | SCAC3 |
| 16 | ROKS | ROBINSON, KARL S TRUCKING COMPANY I | | | SCAC4 |
| 17 | ROKT | ROMEOS TRUCKING LTD | | | SCAC4 |
| 18 | ROKX | Alpha Crushed Stone, Inc. | added 7/1972; eliminated 10/1974 | | NAKINA |
| 19 | ROKX | Alpha Crushed Stone, Inc. | eliminated 10/74 | | NRHS |
| 20 | ROKX | *ALPHA CRUSHED STONE, INC. | | | PWRC |
| 21 | ROKX | +CAROLINA POWER & LIGHT CO. d/b/a PROGRESS ENERGY, INC. | | | PWRC |
| 22 | ROKX | CAROLINS POWER & LIGHT D/B/A PROGRE | | | SCAC4 |
| 23 | ROKY | ROCKY MOUNTAIN SUPPLY INC | | | SCAC4 |
