| 1 | MOR | Morelfy A.S. | Callsign: Morefly, | FIN | AVCODES |
| 2 | MOR | Aerolineas De Morelia | | | ICAO1 |
| 3 | MOR | MITSUI O.S.K. LINES, LTD. | | | PWRC |
| 4 | MORC | MONROE CONTRACTORS EQUIPMENT, INC | | | SCAC1 |
| 5 | MORC | MONROE CONTRACTORS EQUIPMENT (DIV O | | | SCAC4 |
| 6 | MORD | MOREAU TRANSPORT | | | SCAC4 |
| 7 | MORE | MORRELLE TRANSFER INC | | | SCAC4 |
| 8 | MORG | MORGAN OIL COMPANY | | | SCAC4 |
| 9 | MORH | MORRIS TRANSPORT LLC | | | SCAC4 |
| 10 | MORIS | MORIS s.r.o. | | SK | VKM |
| 11 | MORL | MORALES, LOURDES AND OSCAR HERNANDE | | | SCAC4 |
| 12 | MORN | MORRELL ENTERPRISES LP | | | SCAC4 |
| 13 | MORQ | MARTINEZ VEGA, JOSE A | | | SCAC4 |
| 14 | MORR | MORRELL TRANSFER, INC | | | SCAC1 |
| 15 | MORT | MORRIS TRUCKING | | | SCAC4 |
| 16 | MORU | MITSUI O.S.K. LINES LTD | | J | BIC |
| 17 | MORU | ORMA SERVICES, B.V. | | | SCAC3 |
| 18 | MORU | MITSUI O S K LINES LTD | | | SCAC4 |
| 19 | MORW | MOORE TRANSPORTATION SERVICES INC | | | SCAC4 |
| 20 | MORX | North American Car Corp. | added 7/1955; 10/1957-1/1975; eliminated 4/1976 | | NAKINA |
| 21 | MORX | Mather Stock Car Co. | 1/1941-7/1954; eliminated 7/1955 | | NAKINA |
| 22 | MORX | Mather Stock Car Co. | 1/52; eliminated 7/55 | | NRHS |
| 23 | MORX | North American Car Corp. | added 7/55; 10/57-1/75; eliminated 4/76 | | NRHS |
| 24 | MORX | JOHN MORRELL & CO. (NACCO [MATHER STOCK CAR CO.]) | | | PWRC |
| 25 | MORZ | (MOLU) MITSUI O.S.K. LINES, LTD. | | | PWRC |
| 26 | MORZ | Mitsui O.S.K. Lines | | | RSRV |
| 27 | MORZ | MITSUI O.S.K. LINES, LTD. | | | SCAC4 |
