| 101 | HTDT | HILLSIDE TRANSPORTATION LLC | | | SCAC4 |
| 102 | HTDV | HARPS, TIMOTHY | | | SCAC4 |
| 103 | HTDW | HOLDER, TED W TRUCKING | | | SCAC4 |
| 104 | HTDY | HEAVENBOUND TRANSPORT INC | | | SCAC4 |
| 105 | HTE | Midwest Helicopters de Mexico, S.A. de C.V. | Callsign: Helicoptersmexico, | MEX | AVCODES |
| 106 | HTE | Midwest Helicopters De Mexico | | | ICAO1 |
| 107 | HTEC | HI-TECH CARGO, INC | | | SCAC1 |
| 108 | HTEL | HANSERS TRUCKING LLC | | | SCAC4 |
| 109 | HTEN | HOKER TRUCKING LLC | | | SCAC4 |
| 110 | HTEO | HEMCHAK TRUCKING LLC | | | SCAC4 |
| 111 | HTEQ | HYPATIA TRANSPORT | | | SCAC4 |
| 112 | HTFB | HALLWAY TRANSPORT LLC | | | SCAC4 |
| 113 | HTFH | HORST TRUCKING | | | SCAC4 |
| 114 | HTFJ | HILLCORP TRANSPORTATION LLC | | | SCAC4 |
| 115 | HTFM | HILLTOP FARMS LEASING INC | | | SCAC4 |
| 116 | HTFO | HERCHE TRANSFER INC | | | SCAC4 |
| 117 | HTFW | HOLTZMAN TRANSPORT LLC | | | SCAC4 |
| 118 | HTG | Grossman Air Serivce | Callsign: Grossmann, | A | AVCODES |
| 119 | HTG | Hunting Surveys Ltd | Callsign: Hunting, | GB | AVCODES |
| 120 | HTG | Grossmann Air Service | | | ICAO1 |
| 121 | HTGC | HALO TRUCKING LLC | | | SCAC4 |
| 122 | HTGG | HARRIS TRANSPORTATION GROUP LLC | | | SCAC4 |
| 123 | HTGH | HILLTOP GREENHOUSES LTD | | | SCAC4 |
| 124 | HTGI | HI TRADING INTERNATIONAL CORP | | | SCAC4 |
| 125 | HTGM | H T L LOGISTICS INDIA PRIVATE LIMIT | | | SCAC4 |
| 126 | HTGN | HIGHTOWER OIL CO INC | | | SCAC4 |
| 127 | HTGO | HERITAGE OPERATING LP | | | SCAC4 |
| 128 | HTGP | HUTCH TRANSPORTATION GROUP | | | SCAC4 |
| 129 | HTGQ | HURLEY TRUCKING COMPANY, INC | | | SCAC1 |
| 130 | HTGQ | HURLEY TRUCKING COMPANY INC | | | SCAC4 |
| 131 | HTGS | HUNT TUGS & BARGES INC | | | SCAC4 |
| 132 | HTGU | ASIA PACIFIC GAS ENTERPRISE CO., LTD | | HK | BIC |
| 133 | HTGW | HERE TODAY GONE TOMORROW INC | | | SCAC4 |
| 134 | HTGY | HERITAGENERGY | | | SCAC4 |
| 135 | HTH | Helitt Lineas Aereas | IATA: H9, Callsign: Alboran, | E | AVCODES |
| 136 | HTHA | HUGHES TRUCKING INC | | | SCAC4 |
| 137 | HTHB | HUNTS TRUCKING INC | | | SCAC4 |
| 138 | HTHC | HATHCO LINES INC | | | SCAC4 |
| 139 | HTHF | HANCE TRUCKING LLC | | | SCAC4 |
| 140 | HTHH | HIGHTAIL HOTSHOT | | | SCAC4 |
| 141 | HTHL | HEATH OIL INC | | | SCAC4 |
| 142 | HTHM | HP-TECH MOTORSPORT | | | SCAC4 |
| 143 | HTHO | HEATH LOGISTICS INC | | | SCAC4 |
| 144 | HTHR | HOLT TOUR & CHARTER | | | SCAC4 |
| 145 | HTHV | HUWE THE HOUSE MOVER INC | | | SCAC4 |
| 146 | HTI | Haiti International Air, S.A. | Callsign: Haiti International, | RH | AVCODES |
| 147 | HTI | Haiti International Air | | | ICAO1 |
| 148 | HTIC | HOFFMAN TRANSPORTATION INC | | | SCAC4 |
| 149 | HTIE | HARTKE TRUCKING INC | | | SCAC4 |
| 150 | HTIF | HOSPITALITY TRANSPORTS INC | | | SCAC4 |
| 151 | HTIG | HASKINS TRUCKING INC | | | SCAC4 |
| 152 | HTIH | HOLICK TRANSPORTATION INC | | | SCAC4 |
| 153 | HTIJ | HART TRANSPORT INC | | | SCAC4 |
| 154 | HTIL | HEATWAVE TRANSPORT INC | | | SCAC4 |
| 155 | HTIO | HERITAGE TRUCKING INC | | | SCAC4 |
| 156 | HTIS | HTI | | | SCAC4 |
| 157 | HTIT | HTI HYDRAULIC TECHNOLOGIES INC | | | SCAC4 |
| 158 | HTIU | Hudson Technologies | | | RSRV |
| 159 | HTIU | HUDSON TECHNOLOGIES INC | | | SCAC4 |
| 160 | HTIY | HOLY TRANSPORTATION, INC | | | SCAC4 |
| 161 | HTJ | Høng - Tølløse Jernbane (Tølløsebanen) | 1901 - 2003 | DK | jernbanen.dk |
| 162 | HTJ | Hörby - Tollarp Järnväg | 1886 - 1898 | S | svenska-lok.se |
| 163 | HTJ | Høng - Tølløse Jernbane (Tølløsebanen) | 1901 - 2003 | DK | TRAFFIC |
| 164 | HTJB | HARKINS, T J BASIC COMMODITY BROKER | | | SCAC4 |
| 165 | HTK | Ningxia Cargo Airlines Co., Ltd. | IATA: HT, Callsign: Lingbird, IATA Prefix: 669, | PRC | AVCODES |
| 166 | HTKA | H TRUCKING INC | | | SCAC4 |
| 167 | HTKB | HITE TRUCKING LLC | | | SCAC4 |
| 168 | HTKC | HART TRUCKING CORP | | | SCAC4 |
| 169 | HTKD | HILLIARD TRUCKING INC | | | SCAC4 |
| 170 | HTKG | HODGES TRUCKING COMPANY | | | SCAC4 |
| 171 | HTKH | HUFF TRUCKING LLC | | | SCAC4 |
| 172 | HTKI | HORNE TRUCKING INC | | | SCAC4 |
| 173 | HTKJ | HENRYS TRUCKING LLC | | | SCAC4 |
| 174 | HTKL | HANA TRUCKLINES | | | SCAC4 |
| 175 | HTKM | HENNIGAR TRUCKING LLC | | | SCAC4 |
| 176 | HTKO | HOSTETLER TRUCKING | | | SCAC4 |
| 177 | HTKP | HTL TRUCKING CORP | | | SCAC4 |
| 178 | HTKQ | HOMBERGER TRUCKING, INC | | | SCAC1 |
| 179 | HTKR | HANDYTANKERS K/S | | | SCAC4 |
| 180 | HTKV | HOUSTON TANK SERVICES LLC | | | SCAC4 |
| 181 | HTKW | HEARN TRUCKING | | | SCAC4 |
| 182 | HTKY | HOLLIS TRUCKING COMPANY | | | SCAC4 |
| 183 | HTL | Jet Linx Aviation | Callsign: Heartland, | USA | AVCODES |
| 184 | HTL | My Fair Jet GmbH | Callsign: Hotline, | A | AVCODES |
| 185 | HTL | Jet Link Aviation | | | ICAO1 |
| 186 | HTLC | HOMEFOLK TRANSPORTATION, LLC | | | SCAC4 |
| 187 | HTLF | HILLMANS TRANSFER LTD | | | SCAC4 |
| 188 | HTLI | HANNA TRUCK LINE INC | | | SCAC4 |
| 189 | HTLJ | HTL INC | | | SCAC4 |
| 190 | HTLN | HOLTON TRUCK LINE | | | SCAC4 |
| 191 | HTLO | HARTT LOGISTICS | | | SCAC4 |
| 192 | HTLQ | HTL | | | SCAC4 |
| 193 | HTLS | HORIZON TANK LINES INC | | | SCAC4 |
| 194 | HTLU | SHENZHEN HUITAI STEEL MANUFACTURE CO., LTD. | | PRC | BIC |
| 195 | HTLX | Haymer Transport Leasing Co. | added 1/1970; 4/1970; eliminated 7/1971 | | NAKINA |
| 196 | HTLX | Haymer Transport Leasing Co. | added 1/70; 4/70 | | NRHS |
| 197 | HTLX | HAYMER TRANSPORT LEASING CO. | | | PWRC |
| 198 | HTLY | HARTLEY TRUCKING COMPANY, INC | | | SCAC1 |
| 199 | HTM | HTM Jet Service GmbH & Co KG | Callsign: Helitravel, Name changed to HTM Helicopter Travel | D | AVCODES |
| 200 | HTM | HTM Helicopter Travel | Callsign: Helitravel, Name changed from HTM Jet Service GmbH & Co KG | D | AVCODES |
