| 1 | MTN | Mountain Air Cargo, Inc. | IATA: C2, Callsign: Mountain, Designator C2* recalled by IATA. | USA | AVCODES |
| 2 | MTN | Mountain Air Cargo, Inc. | Callsign: Mountain, Designator C2* recalled by IATA. | USA | AVCODES |
| 3 | MTN | Mountain Air Cargo | | | ICAO1 |
| 4 | MTNA | MATTS TRANSPORTATION INC | | | SCAC4 |
| 5 | MTNB | MIDDLETON TRANSPORTATION COMPANY (D | | | SCAC4 |
| 6 | MTNC | MARTINEZ RODRIGUEZ, CALIXTO | | | SCAC4 |
| 7 | MTNE | MILTON ENTERPRISES INC | | | SCAC4 |
| 8 | MTNH | MTN TRANSPORTATION & LOGISTICS INC | | | SCAC4 |
| 9 | MTNI | MOORE TRANSPORTATION INCORPORATED | | | SCAC4 |
| 10 | MTNK | M C TANK TRANSPORT INC | | | SCAC4 |
| 11 | MTNL | MOUNTAINLAND TRANSPORTATION | | | SCAC4 |
| 12 | MTNM | MOUNTAIN STATES MOVING AND STORAGE | | | SCAC4 |
| 13 | MTNM | Mount Newman Mining Railway | | AUS | TRAFFIC |
| 14 | MTNN | MYERS TRANSPORTATION GROUP LLC, THE | | | SCAC4 |
| 15 | MTNO | METALLIC EVOLUTION INC | | | SCAC4 |
| 16 | MTNQ | MOUNTAIN TRUCKING | | | SCAC4 |
| 17 | MTNR | Mississippi Tennessee R.R. LLC | 7/2005 | | NAKINA |
| 18 | MTNR | MISSISSIPPI TENESSEE RAILROAD LLC | | | PWRC |
| 19 | MTNR | MISSISSIPPI TENNESSEE RAILROAD LLC | | | SCAC4 |
| 20 | MTNS | MONTEREY TRANSFER & STORAGE INC | | | SCAC4 |
| 21 | MTNU | MEEBERG HOLDING B.V. | | NL | BIC |
| 22 | MTNV | MOUNTAIN VIEW MOVING & STORAGE | | | SCAC4 |
| 23 | MTNX | Rocky Mountain Transportation Services | added 4/1996; 7/2000-7/2005 | | NAKINA |
| 24 | MTNX | Rocky Mountain Transportation Services | added 4/96; 7/2000 | | NRHS |
| 25 | MTNX | ROCKY MOUNTAIN TRANSPORTATION SERVICES | | | PWRC |
| 26 | MTNX | Rocky Mountain Transportation Services | | | RSRV |
| 27 | MTNY | MCCULLOUGH TRANSPORTATION SERVICES | | | SCAC4 |
