| 101 | HAFR | HORIZON AIR FREIGHT INC | | | SCAC4 |
| 102 | HAFU | HAFNARBAKKI HF | | | SCAC4 |
| 103 | HAFW | HARVEY FREIGHT-WAYS, INC | | | SCAC1 |
| 104 | HAFW | HARVEY FREIGHTWAYS | | | SCAC4 |
| 105 | HAFX | Herf & Frerichs Chemical Co. | 8/1920-7/1923 | | NAKINA |
| 106 | HAFX | HERF & FRERICHS CHEMICAL CO. | | | PWRC |
| 107 | HAG | Hageland Aviation Services, Inc | IATA: H6, Callsign: Hageland, Founed in 1981. Rebranded as Era Alaska in 2009. | USA | AVCODES |
| 108 | HAG | Hageland Aviation Services, Inc | IATA: H6, Callsign: Hageland, Filed for Chapter 11 Bankruptcy, temporarily ceased all operations on 05 April 2020. Founed in 1981. Rebranded as Era Alaska in 2009. | USA | AVCODES |
| 109 | HAG | Hageland Aviation Services | IATA: H6 | | ICAO1 |
| 110 | HAGD | HANSON AGGREGATES NEDERLAND B V | | | SCAC4 |
| 111 | HAGE | Hamburger Eisenbahn e.K | | DE | VKM |
| 112 | HAGEN | Hagener Straßenbahn AG | Real: HST, City: Hagen | D | TRAFFIC |
| 113 | HAGI | HAG LINE | | | SCAC4 |
| 114 | HAGJ | HAGER, JOE TRUCKING INC | | | SCAC4 |
| 115 | HAGO | HAAG OIL COMPANY LLC | | | SCAC4 |
| 116 | HAGQ | HAGEMASTER MOTOR SERVICE, INC | | | SCAC1 |
| 117 | HAGS | HAGAN AND SON TRUCKING INC | | | SCAC4 |
| 118 | HAGU | HERRENKNECHT AG | | D | BIC |
| 119 | HAGX | Hazel-Atlas Glass Co. | 8/1920; 7/1937-1/1941 | | NAKINA |
| 120 | HAGX | Hazel-Atlas Glass Co. | Apr-38 | | NRHS |
| 121 | HAGX | HAZEL-ATLAS GLASS CO. | | | PWRC |
| 122 | HAGY | HAGGERTY LOGISTICS | | | SCAC4 |
| 123 | HAH | Hanhwa Business Jet Airlines Co., Ltd | Callsign: Hanma, | PRC | AVCODES |
| 124 | HAH | Air Comores International | IATA: GG | | ICAO1 |
| 125 | HAHE | HARRAH INDUSTRIES INC | | | SCAC4 |
| 126 | HAHK | H AND H TRUCKING | | | SCAC4 |
| 127 | HAHN | HAHN TRANSPORT | | | SCAC4 |
| 128 | HAHU | SHANGHAI HAI HUA SHIPPING CO LTD | | | SCAC4 |
| 129 | HAHX | The H. & H. Refinery Co. | 8/1920 | | NAKINA |
| 130 | HAHX | H. & H. REFINERY CO. | | | PWRC |
| 131 | HAI | Century Aviation International, Ltd. | | CDN | AVCODES |
| 132 | HAI | Hai Au Aviation Joint Stock Company | | VN | AVCODES |
| 133 | HAI | Century Aviation International | | | ICAO1 |
| 134 | HAIC | HAULIN ACID INC | | | SCAC4 |
| 135 | HAIG | HAIGOOD & CAMPBELL LLC | | | SCAC4 |
| 136 | HAIH | HOLDEN & ASSOCIATES INC | | | SCAC4 |
| 137 | HAIN | HALE INTERMODAL TRUCKING COMPANY (D | | | SCAC4 |
| 138 | HAIO | HODGINS AUCTIONEERS INC | | | SCAC4 |
| 139 | HAIR | HAIR, C ENTERPRISES INC | | | SCAC4 |
| 140 | HAIS | HAI SOON INTERNATIONAL PTE LTD | | | SCAC4 |
| 141 | HAIW | HANNAH MARINE CORP | | | SCAC4 |
| 142 | HAIY | HAILEY TRANSPORT INC | | | SCAC4 |
| 143 | HAIZ | HALBUCK iNDUSTRY | | | PWRC |
| 144 | HAJ | Hajvairy Airlines | Callsign: Hajvairy, | PK | AVCODES |
| 145 | HAJ | Zhoushan Avic Joy General Aviation Co., Ltd. | Callsign: Dingchang, Name changed to Avic Joy General Aviation Co., Ltd. | PRC | AVCODES |
| 146 | HAJ | Avic Joy General Aviation Co., Ltd. | Callsign: Dingchang, Name changed from Zhoushan Avic Joy General Aviation Co., Ltd. | PRC | AVCODES |
| 147 | HAJ | Hajvairy Airlines | | | ICAO1 |
| 148 | HAJ | Hammel - Århus Jernbane (Hammelbanen) | 1902 - 1914 | DK | jernbanen.dk |
| 149 | HAJ | Haderslev Amts Jernbaner | 1899 - 1939 | DK | jernbanen.dk |
| 150 | HAJ | HARTSELL, JOHN J | | | SCAC4 |
| 151 | HAJ | Hajdú Volán | | H | TRAFFIC |
| 152 | HAJD | Haderslev Amts Jernbaner | Real: HAJ, 1899 - 1939 | DK | TRAFFIC |
| 153 | HAJK | HAJEK TRUCKING CO INC | | | PWRC |
| 154 | HAJK | HAMILTON, A JACK | | | SCAC4 |
| 155 | HAJM | Hammel - Århus Jernbane (Hammelbanen) | Real: HAJ, 1902 - 1914 | DK | TRAFFIC |
| 156 | HAJN | HAJNY, JON TRUCKING | | | SCAC4 |
| 157 | HAJT | HAJ TRUCKING INCORPORATED | | | SCAC4 |
| 158 | HAK | Harka Air Services Nig. Ltd. | Callsign: Harkair Services, | WAN | AVCODES |
| 159 | HAK | Pegasus Helicopters AS | Callsign: Helihawk, ICAO callsign changed to Helifalcon | N | AVCODES |
| 160 | HAK | Pegasus Helicopters AS | Callsign: Helifalcon, ICAO callsign changed from Helihawk | N | AVCODES |
| 161 | HAK | Pegasus Helicopters | | | ICAO1 |
| 162 | HAKI | H & A TRUCKING | | | SCAC4 |
| 163 | HAKM | HAKME | | | SCAC4 |
| 164 | HAKN | HART TRUCKING | | | SCAC4 |
| 165 | HAKU | CARU CONTAINERS BV | | NL | BIC |
| 166 | HAKU | CONTAINER COMPANY AMSTERDAM B.V. | | | SCAC3 |
| 167 | HAKU | CONTAINER COMPANY AMSTERDAM BV | | | SCAC4 |
| 168 | HAKY | HAWKEY TRANSPORTATION, INC | | | SCAC1 |
| 169 | HAKY | HAWKEY TRANSPORTATION, INC | | | SCAC4 |
| 170 | HAL | Hawaiian Airlines | IATA: HA, Callsign: Hawaiian, IATA Prefix: 173, | USA | AVCODES |
| 171 | HAL | Hawaiian Airlines | IATA: HA | | ICAO1 |
| 172 | HAL | Hawaiian Airlines | | USA | TRAFFIC |
| 173 | HALB | HALBERT BROTHERS, INC | | | SCAC1 |
| 174 | HALF | HALL TRANSFER LINES | | | SCAC4 |
| 175 | HALG | HALL ENTERPRISE II INC | | | SCAC4 |
| 176 | HALH | HIGH ANGLE LOGISTICS LLC | | | SCAC4 |
| 177 | HALICT | Halifax Corporation Transport | | GB | TRAFFIC |
| 178 | HALJ | HALEY, JAMES J TRUCKING CORP | | | SCAC4 |
| 179 | HALL | HALL, TERRY TRANSPORTATION LLC | | | SCAC4 |
| 180 | HALM | Halifax Metro Transit | | CDN | TRAFFIC |
| 181 | HALN | HALCOMB TRANSPORT LLC | | | SCAC4 |
| 182 | HALP | HARTMANN ASIA RTW LINE PTE LTD/HART | | | SCAC4 |
| 183 | HALR | HALO TRANSPORT LLC | | | SCAC4 |
| 184 | HALS | HARMONY LEASING INC | | | SCAC4 |
| 185 | HALT | HALLS TOWING SERVICE INC | | | SCAC4 |
| 186 | HALTON | Halton Transport | | GB | TRAFFIC |
| 187 | HALU | HEUNG-A LINE CO LTD | | ROK | BIC |
| 188 | HALU | NASM HOLLAND AMERICAN LINE | | | SCAC3 |
| 189 | HALU | NASM HOLLAND AMERICAN LINE | | | SCAC4 |
| 190 | HALV | HALVORSON AGRIBILITY LLC | | | SCAC4 |
| 191 | HALW | H A L TRUCKING | | | SCAC4 |
| 192 | HALX | Holland American Line — Westours Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 193 | HALX | Holland American Line -- Westours Inc. | Jul-00 | | NRHS |
| 194 | HALX | HOLLAND AMERICA LINE - WESTOURS, INC. | | | PWRC |
| 195 | HALX | Holland American Line | | | RSRV |
| 196 | HALX | HOLLAND AMERICAN LINE-WESTOURS INC | | | SCAC4 |
| 197 | HALY | HALEY TRANSPORT | | | SCAC4 |
| 198 | HALZ | HALSTEAD ELEVATOR | | | PWRC |
| 199 | HAM | Haiti Ambassador Airlines | IATA: 2T, Founded in April 2002. Commenced operations in 2003. | RH | AVCODES |
| 200 | HAM | Haiti Ambassador Airlines | IATA: 2T | | ICAO1 |
