| 1 | MHC | Aero Jomacha, S.A. de C.V. | Callsign: Aero Jomacha, | MEX | AVCODES |
| 2 | MHC | Aero Jomacha | | | ICAO1 |
| 3 | MHC | MOHALL CENTRAL RAILROAD, INC. | | | PWRC |
| 4 | MHC | MOHALL CENTRAL RAILROAD INC | | | SCAC4 |
| 5 | MHCA | MICHAEL, CHRISTOPHER & ASSOCIATES I | | | SCAC4 |
| 6 | MHCC | MALHA TRANSPORT INC | | | SCAC4 |
| 7 | MHCD | MATTHES, C. D., INC. | | | SCAC1 |
| 8 | MHCE | MACHINE CARRIERS | | | SCAC4 |
| 9 | MHCG | MACKENZIE HEATING AND COOLING INC | | | SCAC4 |
| 10 | MHCH | MID-SOUTH CONSOLIDATED CHASSIS POOL | | | SCAC4 |
| 11 | MHCI | MOUNTAIN HIGH CONTRACTORS INC | | | SCAC4 |
| 12 | MHCK | MOHAWK CUSTOMS AND SHIPPING CO INC | | | SCAC4 |
| 13 | MHCM | M H C MESSENGERS INC | | | SCAC4 |
| 14 | MHCN | MILLER HONEY CO INC | | | SCAC4 |
| 15 | MHCO | Marquette & Huron Mountain R.R. Co., Inc. | 1/1975-1/1980 | | NAKINA |
| 16 | MHCO | Marquette & Huron Mountain R.R. Co., Inc. | 1/75-1/80 | | NRHS |
| 17 | MHCO | MARQUETTE & HURON MOUNTAIN RAILROAD CO. | | | PWRC |
| 18 | MHCO | Marquette and Huron Mountain Railroad | | | RSRV |
| 19 | MHCP | MCH TRANSPORTATION CO | | | SCAC4 |
| 20 | MHCQ | MARSHALL CONSTRUCTION CO INC | | | SCAC4 |
| 21 | MHCR | M H CRUCES INTERNACIONALES | | | SCAC4 |
| 22 | MHCT | MITSUBISHI CORPORATION | | | SCAC4 |
| 23 | MHCU | MAG CONTAINER LINES INC | | SY | BIC |
| 24 | MHCU | MINTURNO CORPORATION | | | SCAC4 |
