| 101 | HILV | HILL TRANSPORTATION SERVICE INC | | | SCAC4 |
| 102 | HILX | Hillman Coal & Coke Co. | 7/1923 | | NAKINA |
| 103 | HILX | *HILLMAN COAL & COKE CO. | | | PWRC |
| 104 | HILX | +HILLIARD INVESTMENT, LLC | | | PWRC |
| 105 | HILX | HILLIARD INVESTMENTS LLC | | | SCAC4 |
| 106 | HIM | Himalaya Airlines Pvt. Ltd. | IATA: H9, Callsign: Himalaya, IATA Prefix: 769, Established on 20 Aug 2014. Formerly known as Yeti International Pvt. Ltd. Joint venture between HIF Aviation Company Pvt Ltd and Tibet Airlines Ltd. | NEP | AVCODES |
| 107 | HIMA | HI-MYST | | | SCAC4 |
| 108 | HIMG | HILL MOVING SERVICES INC | | | SCAC4 |
| 109 | HIMR | HI-LINE MOVING SERVICES INC | | | SCAC4 |
| 110 | HIMS | HINDMAN & ISAACS MOVING & STORAGE I | | | SCAC4 |
| 111 | HIMT | HIMCO TRUCKING SERVICE INC | | | SCAC4 |
| 112 | HIMU | BASELL POLIOLEFINE ITALIA SRL | | I | BIC |
| 113 | HIMU | BASELL POLIOLEFINE ITALIA SPA | | | SCAC4 |
| 114 | HIMX | Heppner Iron & Metal Co. | added 1/1975; 1/1975-1/1980; eliminated 5/1983; eliminated 7/1988 | | NAKINA |
| 115 | HIMX | Heppner Iron & Metal Co. | added 1/75; 1/75-1/80; eliminated 5/83; eliminated 7/88 | | NRHS |
| 116 | HIMX | HEPPNER IRON & METAL CO. [HANNIBAL IRON & METAL] | | | PWRC |
| 117 | HIMX | Heppner Iron and Metal | | | RSRV |
| 118 | HIMY | HIMILAYA EXPRESS ANTWERPEN BELGIUM | | | SCAC4 |
| 119 | HIN | Heli Inter Riviera | IATA: EC, Callsign: Heli Inter, Designator EC* recalled by IATA. Name changed from Heli-Inter SA. | F | AVCODES |
| 120 | HIN | Heli-Inter SA | IATA: EC, Callsign: Heli Inter, Name changed to Heli Inter Riviera | F | AVCODES |
| 121 | HIN | Holding International Group, S.A. de C.V. | Callsign: Holding Group, | MEX | AVCODES |
| 122 | HIN | Holding International Group | | | ICAO1 |
| 123 | HINA | HUNTWOOD INDUSTRIES | | | SCAC4 |
| 124 | HINB | HCC INC | | | SCAC4 |
| 125 | HINC | HINDS TRUCKING INC | | | SCAC4 |
| 126 | HIND | HENSLEY INDUSTRIES INC | | | SCAC4 |
| 127 | HINF | HAINES, FRED, AND COMPANY, INC | | | SCAC1 |
| 128 | HINF | HAINES, FRED AND CO | | | SCAC4 |
| 129 | HINH | HI NEIGHBOR FLOOR COVERING CO | | | SCAC4 |
| 130 | HINI | HI-NOON PETROLEUM INC | | | SCAC4 |
| 131 | HINK | HENDERSON INC | | | SCAC4 |
| 132 | HINL | HAANER INC | | | SCAC4 |
| 133 | HINM | HULTDINS INC | | | SCAC4 |
| 134 | HINN | HINSON TRANSPORT SERVICE | | | SCAC4 |
| 135 | HINO | Hino | | J | TRAFFIC |
| 136 | HINP | HINRICHSEN EXPRESS INC | | | SCAC4 |
| 137 | HINQ | HERNKES INC | | | SCAC4 |
| 138 | HINS | HEALDWORKS INC | | | SCAC4 |
| 139 | HINV | HOMEDELIVERY | | | SCAC4 |
| 140 | HINW | HERWOOD INC | | | SCAC4 |
| 141 | HINX | Heritage Inks International Corp. | eliminated 1/1998; 7/2000-7/2005 (not listed) | | NAKINA |
| 142 | HINX | Heritage Inks International Corp. | eliminated 1/98; 7/2000 | | NRHS |
| 143 | HINX | HERITAGE INKS INTERNATIONAL CORP | | | PWRC |
| 144 | HINX | Heritage Inks International Corporation | | | RSRV |
| 145 | HINY | HATCHERY INTERNATIONAL | | | SCAC4 |
| 146 | HIOL | HALL OIL COMPANY INC | | | SCAC4 |
| 147 | HIOM | HILL, O B TRUCKING & RIGGING CO INC | | | SCAC4 |
| 148 | HION | HJM INTERNATIONAL OF NY INC | | | SCAC4 |
| 149 | HIOT | HAWAIIAN OCEAN TRANSPORT INC | | | SCAC4 |
| 150 | HIP | Starship, S.A. de C.V. | Callsign: Starsa, | MEX | AVCODES |
| 151 | HIP | Starship | | | ICAO1 |
| 152 | HIP | HIP-AZOTARA DOO | | RS | VKM |
| 153 | HIPA | HIGH PLAINS ALPACAS LTD | | | SCAC4 |
| 154 | HIPL | HI-PLAINS SUNFLOWER CO LLC | | | SCAC4 |
| 155 | HIPP | HIPP, JOHN C INC | | | SCAC4 |
| 156 | HIPX | NRG Energy, Inc. | added 10/2006 | | NAKINA |
| 157 | HIPX | Texas Genco II, LP | added 7/2005; 7/2005; eliminated 10/2006 | | NAKINA |
| 158 | HIPX | Texas Genco, LP | added 10/2004; eliminated 7/2005 | | NAKINA |
| 159 | HIPX | Reliant Energy HL&P | added 7/2000; 7/2000; eliminated 10/2004 | | NAKINA |
| 160 | HIPX | Houston Lighting & Power Co. | eliminated 7/2000 | | NAKINA |
| 161 | HIPX | Hawkeye Produce Co. | 1/1952; eliminated 1/1953 | | NAKINA |
| 162 | HIPX | Hawkeye Produce Co. | 1/52; eliminated 1/53 | | NRHS |
| 163 | HIPX | Houston Lighting & Power Co. | eliminated 7/2000 | | NRHS |
| 164 | HIPX | Reliant Energy HL&P | added 7/2000; 7/2000 | | NRHS |
| 165 | HIPX | *HAWKEYE PRODUCE CO. | | | PWRC |
| 166 | HIPX | +NRG ENERGY [TEXAS GENCO, LP; RELIANT ENERGY HL&P; HOUSTON INDUSTRIES INC - HOUSTON LIGHTING AND POWER CO] | | | PWRC |
| 167 | HIPX | Reliant Energy HL and P | | | RSRV |
| 168 | HIPX | NRG ENERGY INC | | | SCAC4 |
| 169 | HIR | HOLTON INTERURBAN RAILWAY CO. | | | PWRC |
| 170 | HIRA | HI-REL ALLOYS LTD | | | SCAC4 |
| 171 | HIRB | HIRD, BILL | | | SCAC4 |
| 172 | HIRC | HOUSTON INTERMODAL RESOURCES LLC | | | SCAC4 |
| 173 | HIRI | HIRAI TRUCKING | | | SCAC1 |
| 174 | HIRM | HIRAM ENTERPRISES INC | | | SCAC4 |
| 175 | HIRO | HILL-ROM LOGISTICS LLC | | | SCAC4 |
| 176 | HIRO | | City: Hiroshima | J | TRAFFIC |
| 177 | HIROD | Hiroshima Electric Railway | | J | TRAFFIC |
| 178 | HIROS | | City: Hiroshima | J | TRAFFIC |
| 179 | HIRR | Hainesport Industrial R.R. LLC | added 4/2006 | | NAKINA |
| 180 | HIRR | HAINESPORT INDUSTRIAL RAILROAD, LLC | | | PWRC |
| 181 | HIRR | HAINESPORT INDUSTRIAL RAILROAD LLC | | | SCAC4 |
| 182 | HIRS | HIRSCHBACH MOTOR LINES INC | | | SCAC4 |
| 183 | HIRT | HIRT, JIM TRUCKING INC | | | SCAC4 |
| 184 | HIRX | TRANSPORTATION SERVICES AND EQUIPME | | | SCAC4 |
| 185 | HIS | Hispaniola Airways, C. Por. A. | Callsign: Hispaniola, | DOM | AVCODES |
| 186 | HIS | Hispaniola Airways, C. Por. A. | IATA: ZS, Callsign: Hispaniola, Designator ZS recalled by IATA. | DOM | AVCODES |
| 187 | HIS | Hispaniola Airways | | | ICAO1 |
| 188 | HISE | HILTON-SPENCERPORT EXPRESS, INC | | | SCAC1 |
| 189 | HISH | HISHON, C I INC | | | SCAC4 |
| 190 | HISI | HIGH SIERRA EXPRESS-McLAUGHLIN DRAYING COMPANY, INC | | | SCAC1 |
| 191 | HISI | HERNANDEZ, ISIDRO | | | SCAC4 |
| 192 | HISN | HILLCREST SYSTEMS CANADA | | | SCAC4 |
| 193 | HISP | HISPEED TRANSPORT INC | | | SCAC4 |
| 194 | HISP | Hispano Carrocera, S.A. | | E | TRAFFIC |
| 195 | HISS | HIGH INCIDENT SAFEGUARD SOLUTIONS I | | | SCAC4 |
| 196 | HIT | Helitalia S.p.A. | Callsign: Helitalia, | I | AVCODES |
| 197 | HIT | Helitalia | | | ICAO1 |
| 198 | HIT | HIT Holzindustrie Torgau OHG | | DE | VKM |
| 199 | HITC | HILLSBORO TRANSPORTATION COMPANY | | | SCAC1 |
| 200 | HITE | HI-TEC INTERVENTION INC | | | SCAC4 |
