| 1 | MRA | Martinaire | Callsign: Martex, ICAO callsign changed from Martinaire U S | USA | AVCODES |
| 2 | MRA | Martinaire | | | ICAO1 |
| 3 | MRAA | MARTINEZ RODRIGUEZ, AARON | | | SCAC4 |
| 4 | MRAC | MOORE & SON CO | | | SCAC1 |
| 5 | MRAD | MCRAE, F D TRUCKING INC | | | SCAC4 |
| 6 | MRAE | McRAE, BILL, TRUCKING | | | SCAC1 |
| 7 | MRAE | MATHESON, ROY AND ASSOCIATES INC | | | SCAC4 |
| 8 | MRAF | MORGAN, D W | | | SCAC4 |
| 9 | MRAG | MARQUEZ RODRIGUEZ, ROBERT | | | SCAC4 |
| 10 | MRAP | J. A. MIARA TRANS INC. | | | SCAC1 |
| 11 | MRAP | MIARA, J A TRANSPORTATION INC | | | SCAC4 |
| 12 | MRAT | MAR & ALI TRANSFER | | | SCAC4 |
| 13 | MRAV | MORELAND OIL CO | | | SCAC4 |
| 14 | MRAW | MARS TRANSPORTATION INC | | | SCAC4 |
| 15 | MRAX | Mineral Range, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 16 | MRAX | Mineral Range, Inc. | Jul-00 | | NRHS |
| 17 | MRAX | MINERAL RANGE, INC. | | | PWRC |
| 18 | MRAX | Mineral Range | | | RSRV |
| 19 | MRAX | MINERAL RANGE INC | | | SCAC4 |
| 20 | MRAY | MICHAUD & RAYMOND OIL INC | | | SCAC4 |
| 21 | MRAZ | Beneš-Mráz | | CS | TRAFFIC |
