| 1 | MDX | Aerosud Charter | Callsign: Medair, Name changed to Medair Charter (Pty) Ltd | ZA | AVCODES |
| 2 | MDX | Medair Charter (Pty) Ltd | Callsign: Medair, Name changed from Aerosud Charter. | ZA | AVCODES |
| 3 | MDX | Aerosud Charter | | | ICAO1 |
| 4 | MDXB | MERIDIAN EXPRESS INC | | | SCAC4 |
| 5 | MDXC | MIDWEST DIRECT TRANSPORT INC. | | | SCAC4 |
| 6 | MDXD | MASON & DIXON LINES (LOGISTICS DIVI | | | SCAC4 |
| 7 | MDXF | M & D AUTO TRANSPORT LLC | | | SCAC4 |
| 8 | MDXG | MDX LOGISTICS LLC | | | SCAC4 |
| 9 | MDXH | M & D TRANSPORT INC | | | SCAC4 |
| 10 | MDXJ | MDA CONTAINER TRANSPORTATION INC | | | SCAC4 |
| 11 | MDXK | MDN TRANSPORT | | | SCAC4 |
| 12 | MDXL | MIDTEX LOGISTICS INC | | | SCAC4 |
| 13 | MDXO | MALLARD TRANSFER LLC | | | SCAC4 |
| 14 | MDXP | MIDAS EXPRESS | | | SCAC1 |
| 15 | MDXP | MODERN EXPRESS INC | | | SCAC4 |
| 16 | MDXS | M D EXPRESS | | | SCAC4 |
| 17 | MDXT | MIDTEX TRANSPORTATION INC | | | SCAC4 |
| 18 | MDXU | MADDOX HOLDING B V | | | SCAC4 |
| 19 | MDXV | MEDICAL TRANSIT SERVICES | | | SCAC4 |
| 20 | MDXW | MEDALLION TRANSPORT & LOGISTICS LLC | | | SCAC4 |
| 21 | MDXY | MID-ATLANTIC TRANSPORT CORPORATION | | | SCAC4 |
