| 1 | MBK | Chrono Jet, Inc. | Callsign: Matblack, ICAO designator changed from BLK. ICAO Callsign changed from Blackmat. | CDN | AVCODES |
| 2 | MBKA | M & T BROKERAGE LLC | | | SCAC4 |
| 3 | MBKC | MOSLEYS TRUCK BROKERAGE INC | | | SCAC4 |
| 4 | MBKD | MEYER BROS TRUCKING | | | SCAC4 |
| 5 | MBKF | M S A BROKERAGE FIRM | | | SCAC4 |
| 6 | MBKG | MARTIN BROKERAGE INC | | | SCAC4 |
| 7 | MBKQ | MNC BROKERAGE INC | | | SCAC4 |
| 8 | MBKR | MIAMI TRADING AND BROKERS INC | | | SCAC4 |
| 9 | MBKS | MAMBRU | | | SCAC4 |
| 10 | MBKT | MARTIN TRANSPORT LOGISTICS LLC | | | SCAC4 |
| 11 | MBKU | MITSUI & CO LTD | | | SCAC4 |
| 12 | MBKX | Mitsui Rail Capital, LLC | added 10/2004; 7/2005 | | NAKINA |
| 13 | MBKX | MRC Rail Services LLC | added 4/1998; added 10/1999; 7/2000; eliminated 10/2004 | | NAKINA |
| 14 | MBKX | MRC Rail Services L.L.C. | added 4/98; added 10/99; 7/2000 | | NRHS |
| 15 | MBKX | MITSUI RAIL CAPITAL LLC [MITSUI RAIL SERVICES LLC, MRC RAIL SERVICES, LLC] | | | PWRC |
| 16 | MBKX | MRC Rail Services | | | RSRV |
| 17 | MBKX | MITSUI RAIL CAPITAL LLC | | | SCAC4 |
| 18 | MBKX | Mitsui Rail Capital, LLC | | USA | TRAFFIC |
| 19 | MBKY | MEADOWS | | | SCAC4 |
