| 1 | HRE | FFH Sudwestdeutsche Verkehrsfliegerschule | Callsign: Hart Air, | D | AVCODES |
| 2 | HREE | FIVE FIVE SEVEN | | | SCAC4 |
| 3 | HREF | HARE FREIGHT SERVICES INC | | | SCAC4 |
| 4 | HREI | HOUSTON RYDER EXPRESS INC | | | SCAC4 |
| 5 | HREL | HARD ROCK ENTERPRISES LLC | | | SCAC4 |
| 6 | HREM | HOLIDAY RETIREMENT | | | SCAC4 |
| 7 | HREN | HERREN ENTERPRISES INC | | | SCAC4 |
| 8 | HREO | HERRERA, | | | SCAC4 |
| 9 | HREP | HERMITAGE EXPRESS | | | SCAC1 |
| 10 | HREP | HILDABY RIDGE EXPRESS | | | SCAC4 |
| 11 | HRET | HARRIS TRANSPORTATION COMPANY LLC | | | SCAC4 |
| 12 | HREX | Heavy Railroad Excavations, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 13 | HREX | Heavy Railroad Excavations, Inc. | Jul-00 | | NRHS |
| 14 | HREX | HEAVY RAILROAD EXCAVATIONS INC | | | PWRC |
| 15 | HREX | Heavy Railroad Excavations | | | RSRV |
