| 1 | HGD | Hangard Aviation Ltd. | Callsign: Hangard, | MGL | AVCODES |
| 2 | HGD | Korea Aerospace University | Callsign: Hangdae, | ROK | AVCODES |
| 3 | HGD | Hangard Aviation | | | ICAO1 |
| 4 | HGDO | HUNTERS TRUCKING | | | SCAC4 |
| 5 | HGDP | HELENIC ANGEL SHIPPING INC | | | SCAC4 |
| 6 | HGDQ | HUGO TRUCKING LLC | | | SCAC4 |
| 7 | HGDU | HANGZHOU GREENDA ELECTRONIC MATERIALS CO., LTD. | | PRC | BIC |
| 8 | HGDU | HANGZHOU GREENDA CHEMICAL CL LTD | | | SCAC4 |
| 9 | HGDW | HIGGINS, DEWAYNE TRUCKING | | | SCAC4 |
