| 1 | MGC | Magec Aviation Limited | Callsign: Magec, | GB | AVCODES |
| 2 | MGC | Air Cargo Mongolia | Callsign: Mongolia Cargo, | MGL | AVCODES |
| 3 | MGCD | MILGRAM & COMPANY LTD | | | SCAC4 |
| 4 | MGCJ | MULTI GROUP LOGISTICS INC | | | SCAC4 |
| 5 | MGCL | M G CHEMICALS LTD | | | SCAC4 |
| 6 | MGCM | M G CABINETS & MILLWORK LTD | | | SCAC4 |
| 7 | MGCO | MACLEOD GENERAL CONST LTD | | | SCAC4 |
| 8 | MGCP | MORRIS, GENE COMPANY INC | | | SCAC4 |
| 9 | MGCT | MAGIC TRANSPORT | | | SCAC4 |
| 10 | MGCU | MAC FIELD GROUP OF COMPANIES, THE | | | SCAC4 |
| 11 | MGCW | MTI LOGISTICS LLC | | | SCAC4 |
| 12 | MGCX | Morrison Grain Co. | added 1/1967; eliminated 4/1967 | | NAKINA |
| 13 | MGCX | Morrison Grain Co. | added 1/67; eliminated 4/67 | | NRHS |
| 14 | MGCX | MORRISON GRAIN CO. | | | PWRC |
| 15 | MGCY | MAGIC TRANSPORTATION COMPANY INC | | | SCAC4 |
