| 1 | HTB | Helix-Craft Aviation | Callsign: Helix-Craft, | PA | AVCODES |
| 2 | HTB | Horsens - Tørring Banen (Tørringbanen) | 1891 - 1929 | DK | jernbanen.dk |
| 3 | HTB | Hörseltalbahn GmbH | Eisenach (Connex-Gruppe > Veolia Verkehr > Captrain) | D | privat-bahn.de |
| 4 | HTB | Hellertalbahn GmbH | Betzdorf | D | privat-bahn.de |
| 5 | HTB | Hörseltalbahn, Eisenach | | D | TRAFFIC |
| 6 | HTB | Hörseltalbahn | | DE | VKM |
| 7 | HTBB | HUGHES, B & B TRUCKING LLC | | | SCAC4 |
| 8 | HTBC | HELMBOLT TRUCKING INC | | | SCAC4 |
| 9 | HTBC | Hokkaido Takushoku Bus Co.,Ltd. | | J | TRAFFIC |
| 10 | HTBD | HUNT TRANSPORTATION INC (BROKERAGE | | | SCAC4 |
| 11 | HTBD | Horsens - Tørring Banen (Tørringbanen) | Real: HTB, 1891 - 1929 | DK | TRAFFIC |
| 12 | HTBF | HEFFERNAN TRUCKING LLC | | | SCAC4 |
| 13 | HTBI | HOT OIL TRANSPORT | | | SCAC4 |
| 14 | HTBP | HT LOGISTICS LLC | | | SCAC4 |
| 15 | HTBQ | HERSHEY TRANSPORT | | | SCAC4 |
| 16 | HTBR | H T BAR INC | | | SCAC4 |
| 17 | HTBT | HEIL TRUCK BROKERAGE INC | | | SCAC4 |
| 18 | HTBV | HERBERT TRANSPORTATION INC | | | SCAC4 |
| 19 | HTBW | HAMPTON TRANSPORT LLC | | | SCAC4 |
