| 101 | HSEV | HAZCO SERVICES | | | SCAC4 |
| 102 | HSEZ | HARVEST STATE ELEVATOR | | | PWRC |
| 103 | HSF | Hanseo University | Callsign: Han-Seo Flight, | ROK | AVCODES |
| 104 | HSF | HSF Haltinger Speisewagenfreunde | | CH | VKM |
| 105 | HSFD | HENRY SEAFOOD LTD | | | SCAC4 |
| 106 | HSFF | HONCHOS FREIGHT FORWARDING | | | SCAC4 |
| 107 | HSFI | HARRIS FUELS INC | | | SCAC4 |
| 108 | HSFJ | HESS, F J & SONS | | | SCAC4 |
| 109 | HSFJ | Hvellinge - Skanör - Falsterbo Järnväg | 1904 - 1943 | S | svenska-lok.se |
| 110 | HSFM | HIGHLAND STOCK FARMS LTD | | | SCAC4 |
| 111 | HSFU | TIANJIN LVHAI AGRICULTURAL TRADE CO | | | SCAC4 |
| 112 | HSFZ | ATCHISON, TOPEKA & SANTA FE | | | PWRC |
| 113 | HSFZ | Atchison, Topeka and Santa Fe Railway (BNSF Railway) | | | RSRV |
| 114 | HSG | Hesnes Air AS | Callsign: Sky Dolphin, | N | AVCODES |
| 115 | HSG | Vossloh High Speed Grinding GmbH | | DE | VKM |
| 116 | HSGA | HI STAR GROUP INC | | | SCAC4 |
| 117 | HSGC | HANSA SHIPPING GMBH & CO KG | | | SCAC4 |
| 118 | HSGL | HARRIER SHIPPING LLC | | | SCAC4 |
| 119 | HSGP | HARRIS, GENE PETROLEUM INC | | | SCAC4 |
| 120 | HSGR | HASTINGS MARINE | | | SCAC4 |
| 121 | HSGW | HASK GROWERS LTD | | | SCAC4 |
| 122 | HSGZ | HARVEST STATES GRAIN | | | PWRC |
| 123 | HSH | Albanian Railways - Hekurudha e Shqipërisë | | AL | TRAFFIC |
| 124 | HSH | Hekurudha Shqiptare SH.A. | | AL | VKM |
| 125 | HSHM | HISTRIA SHIPMANAGEMENT SRL | | | SCAC4 |
| 126 | HSHN | HARTSHORN OIL INC | | | SCAC4 |
| 127 | HSHR | HARRIS, | | | SCAC4 |
| 128 | HSHT | HOT SHOT TRUCKING LLC | | | SCAC4 |
| 129 | HSI | Heliswiss, Schweizerische Helikopter AG | Callsign: Heliswiss, Name changed to Heliswiss International AG. | CH | AVCODES |
| 130 | HSI | Heliswiss International AG | Callsign: Heliswiss, Name changed to Swiss Helicopter AG. Name changed from Heliswiss, Schweizerische Helikopter AG. | CH | AVCODES |
| 131 | HSI | Swiss Helicopter AG | Callsign: Heliswiss, Name changed from Heliswiss International AG and previously from Heliswiss, Schweizerische Helikopter AG. | CH | AVCODES |
| 132 | HSI | Heliswiss | | | ICAO1 |
| 133 | HSIA | HEATH & SONS INC | | | SCAC4 |
| 134 | HSIJ | HANSA STARS INC | | | SCAC4 |
| 135 | HSIM | HIGHWAY STAR INC | | | SCAC4 |
| 136 | HSIN | Hanshin Electric Railway | | J | TRAFFIC |
| 137 | HSINHO | Hsinho Bus | City: Taipei | RC | TRAFFIC |
| 138 | HSIS | HICKENBOTTOM & SONS INC | | | SCAC4 |
| 139 | HSIT | HEIDEN STRINGED INSTRUMENTS | | | SCAC4 |
| 140 | HSIU | HOYER GLOBAL TRANSPORT | | NL | BIC |
| 141 | HSIU | SHANGHAI HOYER SINOBULK TRANSPORT C | | | SCAC4 |
| 142 | HSIX | Housing Starts Inc. | added 7/1995; eliminated 10/1997; 7/2000-7/2005 (not listed) | | NAKINA |
| 143 | HSIX | Housing Starts Inc. | added 7/95; eliminated 10/97; 7/2000 | | NRHS |
| 144 | HSIX | HOUSING STARTS INC. | | | PWRC |
| 145 | HSIX | Housing Starts Inc. | | | RSRV |
| 146 | HSIZ | HOLLY SUGAR INDUSTRY | | | PWRC |
| 147 | HSJ | Hebei Hongsheng Jet Co., Ltd | Callsign: Baosheng, | PRC | AVCODES |
| 148 | HSJT | HUSS, JIM TRUCKING CO | | | SCAC4 |
| 149 | HSK | Sky Europe Airlines Hungary | IATA: 5P, Callsign: Matra, Designator 5P recalled by IATA | H | AVCODES |
| 150 | HSK | Sky Europe Airlines Hungary | Callsign: Matra, Designator 5P recalled by IATA | H | AVCODES |
| 151 | HSK | Sky Europe Airlines | | | ICAO1 |
| 152 | HSKA | HASKINS AUTO SALVAGE | | | SCAC4 |
| 153 | HSKC | HUSKY MARKETING AND SUPPLY COMPANY | | | SCAC4 |
| 154 | HSKH | HUSKY HAULERS INC | | | SCAC4 |
| 155 | HSKI | HIRATAS TRUCKING | | | SCAC4 |
| 156 | HSKK | HUSKY EXPEDITERS INC | | | SCAC4 |
| 157 | HSKM | HUSKY ENERGY MARKETING INC | | | SCAC4 |
| 158 | HSKN | HARRIS TRUCKING | | | SCAC4 |
| 159 | HSKO | HOSKINS OIL CO LLC | | | SCAC4 |
| 160 | HSKR | HOOSIER TRUCK BROKERS LLC | | | SCAC4 |
| 161 | HSKT | HUSKY TRANSPORT INC | | | SCAC4 |
| 162 | HSKU | HAFSKIP LTD LINE | | | SCAC4 |
| 163 | HSKW | HARRIS TRUCKING | | | SCAC4 |
| 164 | HSKX | HUSKY OIL OPERATIONS LTD. | | | PWRC |
| 165 | HSKX | HUSKY OIL OPERATIONS LIMITED | | | SCAC4 |
| 166 | HSKY | HUSKY FARM EQUIPMENT LIMITED | | | SCAC4 |
| 167 | HSL | Hispania Lineas Aereas, S.L. | Callsign: Hispania, | E | AVCODES |
| 168 | HSL | Hispania, S.A. | IATA: HH, Ceased operations on 15 July 1989. IATA designator changed from XX | E | AVCODES |
| 169 | HSL | Vladivostock Air | IATA: XF, ICAO designator changed to VLK | RUS | AVCODES |
| 170 | HSL | Hispania, S.A. | IATA: XF, IATA designator changed to HH | E | AVCODES |
| 171 | HSL | Hispania Lineas Aereas, S.L. | IATA: HI, Callsign: Hotel India, IATA designator changed to XF. | E | AVCODES |
| 172 | HSL | Helisirio SRL | Callsign: Helisirio, | I | AVCODES |
| 173 | HSL | HSL-Logistik GmbH | Hamburg | D | privat-bahn.de |
| 174 | HSL | HSL Logistik GmbH | | D | TRAFFIC |
| 175 | HSL | HSL Logistik GmbH | | DE | VKM |
| 176 | HSLB | HESTER LOGISTICS LLC | | | SCAC4 |
| 177 | HSLC | HANSA LINIE CO | | | SCAC4 |
| 178 | HSLD | HOSELTON STUDIO LIMITED | | | SCAC4 |
| 179 | HSLE | HUDSON SHIPPING LINES INC | | | SCAC4 |
| 180 | HSLF | H & STL LLC | | | SCAC4 |
| 181 | HSLN | HOWE SHIPPING LIMITED | | | SCAC4 |
| 182 | HSLO | HASSEL, TOM TRANSPORT INC | | | SCAC4 |
| 183 | HSLQ | H & S LOGISTICS VENTURES LLC | | | SCAC4 |
| 184 | HSLU | HAULAGE SERVICES, LTD. | | | PWRC |
| 185 | HSLU | Haulage Services | | | RSRV |
| 186 | HSLU | HUISMAN SPECIAL LIFTING EQUIPMENT B | | | SCAC4 |
| 187 | HSLV | HABA SPED LTD | | | SCAC4 |
| 188 | HSM | Helicopter Service MTTE | Callsign: Lifestar, | D | AVCODES |
| 189 | HSM | Helicopter Services Malta Limited | Callsign: Helimalt, | M | AVCODES |
| 190 | HSM | Horizon Air for Transport and Training | | | ICAO1 |
| 191 | HSM | Dutch Iron Railway Company | | NL | TRAFFIC |
| 192 | HSMA | HARMONIA SHIPPING MANAGEMENT INC | | | SCAC4 |
| 193 | HSMC | HOLLANDER INTERNATIONAL STORAGE AND | | | SCAC4 |
| 194 | HSMG | HANDLING SPECIALTY MANUFACTURING LI | | | SCAC4 |
| 195 | HSMI | HEWITT, S M (SARNIA) LTD | | | SCAC4 |
| 196 | HSMN | HOLLYWOOD & SPORTS MEMORABILIA INC | | | SCAC4 |
| 197 | HSMX | Housmex, Inc. | added 1/1986; eliminated 7/1992; 1/1994 (not listed) | | NAKINA |
| 198 | HSMX | Housmex, Inc. | added 1/86; eliminated 7/92; 1/94 | | NRHS |
| 199 | HSMX | *HESSEN STEAM MUSEUM | | | PWRC |
| 200 | HSMX | *HOUSMEX, INC. | | | PWRC |
