| 1 | HDL | Hendell Aviation Oy | Callsign: Hendell, | FIN | AVCODES |
| 2 | HDL | Hastings Diesels Limited | | UK | VKM |
| 3 | HDLA | HIRSCH DEVELOPMENTS LTD | | | SCAC4 |
| 4 | HDLC | HENDRIX AND DAIL INC | | | SCAC4 |
| 5 | HDLE | HASKELL, DUSTY L | | | SCAC4 |
| 6 | HDLG | HEARTLAND LOGISTICS LLC | | | SCAC4 |
| 7 | HDLK | H D L ENTERPRISES INC | | | SCAC4 |
| 8 | HDLM | HOOFBEATS DISTRIBUTION LIMITED | | | SCAC4 |
| 9 | HDLO | HENDEL'S INCORPORATED | | | SCAC4 |
| 10 | HDLP | HAPPY DAYS LEISURE PRODUCTS LIMITED | | | SCAC4 |
| 11 | HDLR | HIDALGO ROCHIN, MARCOS ABRAHAM | | | SCAC4 |
| 12 | HDLT | H D L TRANSPORT INC | | | SCAC4 |
| 13 | HDLU | SAFMARINE CONTAINER LINES NV | | | SCAC4 |
| 14 | HDLX | Helm Diamond Rail Leasing | added 10/2008 | | NAKINA |
| 15 | HDLX | HELM DIAMOND RAIL LEASING | | | PWRC |
