| 1 | MPE | Air Norterra Inc, d/b/a Canadian North | IATA: 5T, Callsign: Emphis, IATA Prefix: 518, Founded in 1989. Name changed to Canadian North Inc. ICAO callsign changed to Empress. IATA designator changed from 3F* | CDN | AVCODES |
| 2 | MPE | Air Norterra Inc, d/b/a Canadian North | IATA: 5T, Callsign: Empress, IATA Prefix: 518, Founded in 1989. ICAO designator changed from ANX, ICAO Callsign changed to Norterra | CDN | AVCODES |
| 3 | MPE | Canadian North Inc. | IATA: 5T, Callsign: Empress, IATA Prefix: 518, Founded in 1989. Name changed from Air Norterra Inc, d/b/a Canadian North w.e.f. 07 May 1998. ICAO callsign changed from Emphis. IATA designator changed from 3F* | CDN | AVCODES |
| 4 | MPE | Canadian North | IATA: 5T | | ICAO1 |
| 5 | MPEI | MERCER, PAUL ENTERPRISES INC | | | SCAC4 |
| 6 | MPES | M P ENVIRONMENTAL SERVICES INC | | | SCAC4 |
| 7 | MPEX | Motivepower Industries Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 8 | MPEX | Motivepower Industries Inc. | Jul-00 | | NRHS |
| 9 | MPEX | *MEAD PAPER COMPANY | | | PWRC |
| 10 | MPEX | +MOTIVEPOWER INDUSTRIES INCORPORATED | | | PWRC |
| 11 | MPEX | MotivePower Industries | | | RSRV |
| 12 | MPEX | Motivepower Industries Inc. | | USA | TRAFFIC |
