| 1 | HES | Heli Services | | F | AVCODES |
| 2 | HES | Harbour Air (Malta) Ltd | Callsign: Harbour Express, Ceased operations. sunsidary of Harbour Air Seaplanes, Canada. Founded in June 2007. | M | AVCODES |
| 3 | HES | Holiday Europe Ltd. | IATA: 5Q, Callsign: Holiday Europe, IATA Designator changed to 5Q. | BG | AVCODES |
| 4 | HES | Holiday Europe Ltd. | IATA: 5Q, Callsign: Holiday Europe, IATA Prefix: 062, IATA Designator changed from 5Q*. | BG | AVCODES |
| 5 | HES | Hennigsdorfer Elektrostahlwerk GmbH | | D | TRAFFIC |
| 6 | HESA | HERNANDEZ SOLORZANO, ANTONIO | | | SCAC4 |
| 7 | HESB | HESTER BROKERS INC | | | SCAC4 |
| 8 | HESE | H E S EXPRESS INC | | | SCAC4 |
| 9 | HESF | Hammer Eisenbahnfreunde e. V. + Museumseisenbahn Hamm e. V | | D | TRAFFIC |
| 10 | HESJ | HINE ENVIRONMENTAL SERVICES LLC | | | SCAC4 |
| 11 | HESK | HESTER TRUCKING INC | | | SCAC4 |
| 12 | HESO | HATCH ESSENTIAL OIL CO | | | SCAC4 |
| 13 | HESP | HELIX ENERGY SOLUTIONS GROUP INC | | | SCAC4 |
| 14 | HESR | Huron and Eastern Ry. Co. | added 7/1986; eliminated 7/1991 | | NAKINA |
| 15 | HESR | Huron and Eastern Ry. Co., Inc. | added 7/1991; 1/1994-7/2005 | | NAKINA |
| 16 | HESR | Huron and Eastern Ry. Co. | added 7/86; eliminated 7/91 | | NRHS |
| 17 | HESR | Huron and Eastern Ry. Co., Inc. | added 7/91; 1/94-7/2000 | | NRHS |
| 18 | HESR | HURON & EASTERN RAILWAY CO | | | PWRC |
| 19 | HESR | Huron and Eastern Railway | | | RSRV |
| 20 | HESR | HURON AND EASTERN RAILWAY COMPANY I | | | SCAC4 |
| 21 | HESS | Carrosserie HESS AG | | CH | TRAFFIC |
| 22 | HEST | HESS TRUCKING CO | | | SCAC4 |
| 23 | HESU | HUTCHINSON EQUIPMENT SERVICES | | USA | BIC |
| 24 | HESU | HERITAGE ENVIRONMENTAL SERVICES, INC. | | | PWRC |
| 25 | HESU | Heritage Environmental Services | | | RSRV |
| 26 | HESX | Heritage Environmental Services, Inc. c/o Heritage Group | 1/1994 (not listed); added 1/1997; 7/2000-7/2005; eliminated 7/2007 | | NAKINA |
| 27 | HESX | Heritage Environmental Services, Inc. | 1/94; added 1/97 | | NRHS |
| 28 | HESX | Heritage Environmental Services, Inc. c/o Heritage Group | Jul-00 | | NRHS |
| 29 | HESX | HERITAGE ENVIRONMENTAL SERVICES, INC. | | | PWRC |
| 30 | HESX | Heritage Environmental Services | | | RSRV |
| 31 | HESX | HERITAGE ENVIRONMENTAL SERVICES LLC | | | SCAC4 |
| 32 | HESZ | *HERITAGE ENVIRONMENTAL SERVICES, INC | | | PWRC |
| 33 | HESZ | *HESKETT #1 | | | PWRC |
| 34 | HESZ | Heritage Environmental Services | | | RSRV |
| 35 | HESZ | HERITAGE ENVIRONMENTAL SERVICES, IN | | | SCAC4 |
