| 1 | MTP | Island Helicopters, Inc. | Callsign: Metrocopter, | USA | AVCODES |
| 2 | MTP | Island Helicopters | | | ICAO1 |
| 3 | MTP | MIDWEST COACHES INC | | | SCAC4 |
| 4 | MTPC | M T C TRANSPORTATION CO | | | SCAC4 |
| 5 | MTPD | MOUNTAIN TRANSPORT INC | | | SCAC4 |
| 6 | MTPE | M C TRANSPORT ET FILS INC | | | SCAC4 |
| 7 | MTPF | METROPOLITAN TRANSIT AUTHORITY | | | SCAC4 |
| 8 | MTPH | MOORE TRANSPORTATION INC | | | SCAC4 |
| 9 | MTPI | MUELLER TRANSPORTATION INC | | | SCAC4 |
| 10 | MTPN | MARTINS TRANSPORT SERVICE | | | SCAC4 |
| 11 | MTPP | MARINE TRANSPORT, INC | | | SCAC1 |
| 12 | MTPP | MARINE TRANSPORT INC | | | SCAC4 |
| 13 | MTPS | METRO EXPRESS AMERICA INC | | | SCAC4 |
| 14 | MTPU | METRANS, a.s. | | CZ | BIC |
| 15 | MTPV | METROPOLITAN VAN & STORAGE INC | | | SCAC4 |
| 16 | MTPX | Montana Power Co. | added 10/1994; 7/2000-7/2005 | | NAKINA |
| 17 | MTPX | Montana Power Co. | added 10/94; 7/2000 | | NRHS |
| 18 | MTPX | MONTANA POWER COMPANY | | | PWRC |
| 19 | MTPX | Montana Power | | | RSRV |
| 20 | MTPX | MONTANA POWER COMPANY | | | SCAC4 |
| 21 | MTPY | MALLORY TRUCKING | | | SCAC4 |
