| 1 | MRI | Servicios Aereos Moritani, S.A. de C.V. | Callsign: Moritani, | MEX | AVCODES |
| 2 | MRI | Servicios Aereos Moritani | | | ICAO1 |
| 3 | MRI | Mohall R.R., Inc. | 7/2000-7/2005 | | NAKINA |
| 4 | MRI | Mohall R.R., Inc. | Jul-00 | | NRHS |
| 5 | MRI | MOHALL RAILROAD, INC. | | | PWRC |
| 6 | MRI | Mohall Railroad | | | RSRV |
| 7 | MRI | MOHALL RAILROAD INC | | | SCAC4 |
| 8 | MRIC | MORLAES RICO, GREGORIO | | | SCAC4 |
| 9 | MRID | MARTAINER INC | | | SCAC4 |
| 10 | MRIF | MARTIN LOGISTICS INCORPORATED | | | SCAC4 |
| 11 | MRIG | MORRIS TRUCKING CORP | | | SCAC4 |
| 12 | MRIH | MR C INC | | | SCAC4 |
| 13 | MRII | MARELI INTERNATIONAL INC | | | SCAC4 |
| 14 | MRIJ | MARCO RENTAL INC | | | SCAC4 |
| 15 | MRIK | MERRITT OIL COMPANY INC | | | SCAC4 |
| 16 | MRIL | MORRIS INDUSTRIES LTD | | | SCAC4 |
| 17 | MRIM | MERRITT MOVING & STORAGE INC | | | SCAC4 |
| 18 | MRIR | M & R INTERMODAL LLC | | | SCAC4 |
| 19 | MRIS | MARTIN INDUSTRIES | | | SCAC4 |
| 20 | MRIU | MJOLKURFELAG REYKJAVIKUR | | | SCAC4 |
| 21 | MRIX | Monarch Refineries, Inc. | 1/1950-7/1954; eliminated 1/1957 | | NAKINA |
| 22 | MRIX | Monarch Refineries, Inc. | Jan-52 | | NRHS |
| 23 | MRIX | *MONARCH REFINERIES, INC. | | | PWRC |
| 24 | MRIX | *MEADOW RIVER MINE | | | PWRC |
| 25 | MRIX | Motive Rail Industries | | | RSRV |
| 26 | MRIX | MOTIVE RAIL INC | | | SCAC4 |
