| 1 | HDR | Helikopterdrift AS | Callsign: Helidrift, Name changed to Helitrans AS. ICAO callsign changed to Helitrans. | N | AVCODES |
| 2 | HDR | Helitrans AS | Callsign: Helitrans, Name changed from Helikopterdrift AS. ICAO callsign changed to Helitdrift. | N | AVCODES |
| 3 | HDR | Helikopterdrift | | | ICAO1 |
| 4 | HDRC | HANDRICH TRUCKING INC | | | SCAC4 |
| 5 | HDRI | HOOD TRANSPORTATION | | | SCAC4 |
| 6 | HDRK | HINDRIKS, GEORGE | | | SCAC4 |
| 7 | HDRM | HEIDMAR INC | | | SCAC4 |
| 8 | HDRN | HENDRICKSON TRANSPORTATION LLC | | | SCAC4 |
| 9 | HDRQ | H D R | | | SCAC4 |
| 10 | HDRT | HYDRA TRANSPORT | | | SCAC4 |
| 11 | HDRX | Helm Diamond Rail Leasing | added 10/2008 | | NAKINA |
| 12 | HDRX | HELM DIAMOND RAIL LEASING | | | PWRC |
