| 1 | MRO | Morrison Flying Service, Inc. | Callsign: Morrison, | USA | AVCODES |
| 2 | MRO | Morrison Flying Service | | | ICAO1 |
| 3 | MROC | M & R TRUCKING ONE (1) INC | | | SCAC4 |
| 4 | MROD | MORALES RODRIGUEZ, ALEJANDRO | | | SCAC4 |
| 5 | MROF | MOORE ORCHARDS FARM INC | | | SCAC4 |
| 6 | MROJ | MAROIS, CHRISTIAN | | | SCAC4 |
| 7 | MROL | MORENO ROLDAN, LUIS | | | SCAC4 |
| 8 | MROM | METRO MOVERS INC | | | SCAC4 |
| 9 | MROO | MORENO PETROLEUM CO (DIVISION OF ST | | | SCAC4 |
| 10 | MROT | MERICLE CONSTRUCTION INC | | | SCAC4 |
| 11 | MROV | MARTINOVICH TRUCKING INC | | | SCAC4 |
| 12 | MROW | MURROWS TRANSFER INC | | | SCAC4 |
| 13 | MROX | Marathon Petroleum Co. LLC | added 1/2009; added 4/2009 | | NAKINA |
| 14 | MROX | Mobile Rosin Oil Co. | 7/1930-7/1935; 7/1937 (not listed) | | NAKINA |
| 15 | MROX | MOBILE ROSIN OIL CO. | | | PWRC |
| 16 | MROX | MARATHON PETROLEUM COMPANY LLC | | | SCAC4 |
