| 1 | MDK | Medic Air (West Africa) Ltd. | Callsign: Air Doc, | WAN | AVCODES |
| 2 | MDK | Madikwe Charter CC | Callsign: Madikwe, | ZA | AVCODES |
| 3 | MDKC | MEINHARDT TRUCKING LLC | | | SCAC4 |
| 4 | MDKD | MEDINAS TRUCKING | | | SCAC4 |
| 5 | MDKE | MOLARIUS, DAN TRUCKING | | | SCAC4 |
| 6 | MDKG | MD TRUCKING | | | SCAC4 |
| 7 | MDKH | MEDRANO TRUCKING | | | SCAC4 |
| 8 | MDKI | MADINA TRUCKING INC | | | SCAC4 |
| 9 | MDKK | GARDAU MRM STEEL, INC. (MANDAK METAL PROCESSORS DIVISION) | | | PWRC |
| 10 | MDKK | M D S TRUCKING INC | | | SCAC4 |
| 11 | MDKM | M & D TRUCKING | | | SCAC4 |
| 12 | MDKN | MID-DAKOTA TRANSPORT INC | | | SCAC4 |
| 13 | MDKS | MOERDIJK CARGO SERVICES BV | | | SCAC4 |
| 14 | MDKU | RHENUS LOGISTICS AUSTRIA GMBH | | A | BIC |
| 15 | MDKW | MUIRHEAD TRUCKING LIMITED | | | SCAC4 |
| 16 | MDKX | Mandak Metal Processors Division of Gerdau MRM Steel Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 17 | MDKX | Molasses Distributors Corp. | 7/1930 | | NAKINA |
| 18 | MDKX | Mandak Metal Processors Division of Gerdau MRM Steel Inc. | Jul-00 | | NRHS |
| 19 | MDKX | *MOLASSES DISTRIBUTORS CORP. | | | PWRC |
| 20 | MDKX | +MANDAK METAL PROCESSORS DIV., GERDAU MRM STEEL INC. | | | PWRC |
| 21 | MDKX | Gardau MRM Steel Mandak Metal Processors Division | | | RSRV |
| 22 | MDKX | MANDAK METAL PROCESSORS DIV OF GERD | | | SCAC4 |
| 23 | MDKY | M & D TRUCKING LLC | | | SCAC4 |
