| 1 | HKS | Helikopter Service A/S | IATA: L5, Callsign: Helibus, Name changed to CHC Helikopter Service AS | N | AVCODES |
| 2 | HKS | Helikopter Service A/S | IATA: HK, Callsign: Helibus, | N | AVCODES |
| 3 | HKS | CHC Helikopter Service AS | IATA: L5, Callsign: Helibus, Designator L5 recalled by IATA. Name changed from Helikopter Service A/S | N | AVCODES |
| 4 | HKS | CHC Helikopter Service AS | Callsign: Helibus, Designator L5 recalled by IATA. Name changed from Helikopter Service A/S | N | AVCODES |
| 5 | HKS | CHC Helikopter Service | | | ICAO1 |
| 6 | HKSB | HAMRICK SR, BRET T | | | SCAC4 |
| 7 | HKSC | HUCKABAY, KENT S LLC | | | SCAC4 |
| 8 | HKSD | HOOKS, DUANE | | | SCAC4 |
| 9 | HKSL | HENRIKSEN, AL TRANS | | | SCAC4 |
| 10 | HKSN | HOCKERSMITH TRANSPORTATION SERVICES COMPANY, INC | | | SCAC1 |
| 11 | HKSP | HAWK SHIPPING LLC | | | SCAC4 |
| 12 | HKSR | H K SPEED EXPRESS INC | | | SCAC4 |
| 13 | HKST | HILKER, STEVE TRUCKING INC | | | SCAC4 |
