| 1 | NHK | Federal Aviation Administration (ATO-330) | Callsign: Nighthawk, Name changed to United States Government, Federal Aviation Administration. | USA | AVCODES |
| 2 | NHK | United States Government, Federal Aviation Administration | Callsign: Nighthawk, Name changed from Federal Aviation Administration (ATO-330). | USA | AVCODES |
| 3 | NHK | Federal Aviation Administration | | | ICAO1 |
| 4 | NHKA | NHK ENTERPRISES AMERICA INC | | | SCAC4 |
| 5 | NHKC | NIGHTHAWK COURIER SERVICE INC | | | SCAC3 |
| 6 | NHKE | NIGHTHAWK ENTERPRISES | | | SCAC3 |
| 7 | NHKF | NIGHTHAWK FLATBED TRANSPORT | | | SCAC4 |
| 8 | NHKT | NIGHT HAWK TRANSPORT INC | | | SCAC3 |
