| 1 | HWK | Swazi Air Charter (Pty) Ltd. | Callsign: Hawk, Ceased operations. | SD | AVCODES |
| 2 | HWK | Hawkrise Air Services Ltd. | Callsign: Hawkrise, | GB | AVCODES |
| 3 | HWK | Brainerd Helicopters, Inc. t/a Firehawk Helicopters | Callsign: Firehawk, | USA | AVCODES |
| 4 | HWKA | HAWKINS CHARTER SERVICE INC | | | SCAC4 |
| 5 | HWKB | HAWTHORNE TRUCKING LLC | | | SCAC4 |
| 6 | HWKC | HANDWERK CONTRACTORS | | | SCAC4 |
| 7 | HWKH | HARTWICK & HAND INC | | | SCAC4 |
| 8 | HWKI | HAWKINS TRUCKING L C | | | SCAC4 |
| 9 | HWKK | HAWK-N-TRANS TRUCKING LLC | | | SCAC4 |
| 10 | HWKN | HAWKS, LOREN | | | SCAC4 |
| 11 | HWKO | HAWKES, WILLIAM PRODUCTS | | | SCAC4 |
| 12 | HWKP | HAWKS TRANSPORT | | | SCAC4 |
| 13 | HWKQ | HOLLYWOOD TRUCKING SOLUTIONS INC | | | SCAC4 |
| 14 | HWKT | HAWK, RANDY TRUCKING INC | | | SCAC4 |
| 15 | HWKW | HAWKWAY INDUSTRIES INC | | | SCAC4 |
