| 1 | HI | Holton Inter-Urban Ry. Co. | 8/1920-10/1966 & 1/1975-1/1980; eliminated 4/1986 | NAKINA | |
| 2 | HI | Holton Inter-Urban Ry. Co. | 4/38-10/66 & 1/75-1/80; eliminated 4/86 | NRHS | |
| 3 | HI | HOLTON INTERURBAN RY | PWRC | ||
| 4 | HI | Holton Interurban Railway | RSRV | ||
| 5 | HI | Hammersley Iron | AUS | TRAFFIC | |
| 6 | HIA | Canadian Eagle Aviation | ICAO1 | ||
| 7 | HIAC | HAULCO INC | SCAC4 | ||
| 8 | HIAR | HAWAII AIR CARGO INC | SCAC4 | ||
| 9 | HIB | Helibravo Aviacao | ICAO1 | ||
| 10 | HIBB | HILL, W W INC | SCAC4 | ||
| 11 | HIBT | HIBA TRANSPORT | SCAC4 | ||
| 12 | HIC | THE HIGH IRON CO.INC. | PWRC | ||
| 13 | HICA | HI C TRANSPORTATION | SCAC4 | ||
| 14 | HICC | HIGH TRACK LLC | SCAC4 | ||
| 15 | HICI | HIGH POINT EQUIPMENT LTD | SCAC4 | ||
| 16 | HICL | HARRINGTON TRUCKING | SCAC4 | ||
| 17 | HICN | HIE HOLDINGS INC | SCAC4 | ||
| 18 | HICT | HI C TRANSPORTATION INC | SCAC4 | ||
| 19 | HICU | HAESAERTS INTERMODAL NV | SCAC4 | ||
| 20 | HICV | HORIZON INTERNATIONAL CARGO INC | SCAC4 | ||
| 21 | HICX | HUNTSVILLE INTERNATIONAL INTERMODAL CENTER | PWRC | ||
| 22 | HICX | Huntsville International Intermodal Center | USA | TRAFFIC | |
| 23 | HID | Aviacion Ejecutiva De Hildago | ICAO1 | ||
| 24 | HIDI | HI-DICE TRUCKING | SCAC4 | ||
| 25 | HIDN | HIDDEN VALLEY TRANSFER INC | SCAC4 | ||
| 26 | HIDQ | HI-DESERT MOVING & STG | SCAC4 | ||
| 27 | HIDS | HI-DESERT TRANSFER & STORAGE | SCAC4 | ||
| 28 | HIDT | HEITER TRUCK LINE INC | SCAC4 | ||
| 29 | HIDX | Merchants Despatch Transportation Corp. | 1/1941-1/1943 | NAKINA | |
| 30 | HIDX | MERCHANTS DESPATCH TRANSPORTATION CORP. | PWRC | ||
| 31 | HIEC | HIEB TRANS LOGISTICS LLC | SCAC4 | ||
| 32 | HIEL | HIELO Y REFRIGERACION FRONTERIZA SA | SCAC4 | ||
| 33 | HIEM | HIBMA TRUCKING | SCAC4 | ||
| 34 | HIEP | HOUSTON INTERMODAL EXPRESS LLC | SCAC4 | ||
| 35 | HIER | HILLIER TRUCKING | SCAC4 | ||
| 36 | HIES | HIERS, J CO INC | SCAC4 | ||
| 37 | HIET | HIEL TRUCKING INC | SCAC4 | ||
| 38 | HIF | Heli-Iberica Fotogrametria | ICAO1 | ||
| 39 | HIFER | HIFER CONSTRUCCION, CONSERVACION Y SERVICIOS, S.A. | ES | VKM | |
| 40 | HIFI | HELLMANN WORLDWIDE LOGISTICS INC | SCAC4 | ||
| 41 | HIG | Heli-Inter Guyane | ICAO1 | ||
| 42 | HIGG | HIGG TRUCKING INC | SCAC4 | ||
| 43 | HIGH | HIGHLAND TRANSPORTATION INC | SCAC4 | ||
| 44 | HIGK | HIDALGOS TRUCKING | SCAC4 | ||
| 45 | HIGO | HI-GRADE OIL CO INC | SCAC4 | ||
| 46 | HIGR | HIGH-TECH AGRO LTD | SCAC4 | ||
| 47 | HIGS | HERMILA INES, GARCIA BENAVIDES | SCAC4 | ||
| 48 | HIGY | HIGHWAY FREIGHT SYSTEMS INC | SCAC4 | ||
| 49 | HIHN | HIGH LINK LINE INC | SCAC4 | ||
| 50 | HIHO | HITCH HOUSE, THE | SCAC4 | ||
| 51 | HIHP | HIGH HOPES TRANSPORTATION INC | SCAC4 | ||
| 52 | HIHR | HRCP II HAMPTON ROADS CHASSIS POOL | SCAC4 | ||
| 53 | HIHT | HIGH TECHNOLOGY LOGISTICS | SCAC1 | ||
| 54 | HIIA | HTS INTERNATIONAL INC | SCAC4 | ||
| 55 | HIIN | HARMON INTERNATIONAL INDUSTRIES INC | SCAC4 | ||
| 56 | HIIT | HAWAII INTERMODAL TANK TRANSPORT | SCAC4 | ||
| 57 | HIIX | TTX Co., Hamburg Division | added 1/1992; 1/1994; eliminated 7/1996; 7/2000-7/2005 (not listed) | NAKINA | |
| 58 | HIIX | Trailer Train Co., Hamburg Division | added 7/1984; eliminated 1/1992 | NAKINA | |
| 59 | HIIX | Hamburg Industries, a Division of Trailer Train Co. | added 4/1984; eliminated 7/1984 | NAKINA | |
| 60 | HIIX | Hamburg Industries, Inc. | added 4/1976; 1/1980; eliminated 4/1984 | NAKINA | |
| 61 | HIIX | Hamburg Industries, Inc. | added 4/76; 1/80; eliminated 4/84 | NRHS | |
| 62 | HIIX | Hamburg Industries, a Division of Trailer Train Co. | added 4/84; eliminated 7/84 | NRHS | |
| 63 | HIIX | Trailer Train Co., Hamburg Division | added 7/84; eliminated 1/92 | NRHS | |
| 64 | HIIX | TTX Co., Hamburg Division | added 1/92; 1/94; eliminated 7/96 | NRHS | |
| 65 | HIIX | TTX Co., Hamburg Division | Jul-00 | NRHS | |
| 66 | HIIX | TTX COMPANY - HAMBURG DIVISION | PWRC | ||
| 67 | HIIX | Hamburg Industries (TTX) | RSRV | ||
| 68 | HIIX | TTX COMPANY | SCAC4 | ||
| 69 | HIKH | HIKOH TRUCKING | SCAC4 | ||
| 70 | HIKS | HICKS TRUCKING INC | SCAC4 | ||
| 71 | HIKT | HICK TRUCKING COMPANY OF LITCHFIELD | SCAC4 | ||
| 72 | HIKW | HIRSCHE, KENNETH WILLIAM INC | SCAC4 | ||
| 73 | HILC | HILL TRANSPORT INC | SCAC4 | ||
| 74 | HILF | HILITE SEAFOOD | SCAC4 | ||
| 75 | HILH | HORIZON INT'L SHIPPING INC | SCAC4 | ||
| 76 | HILI | HI-LINE TRANSFER AND STORAGE INCORP | SCAC4 | ||
| 77 | HILJ | HILL, JAMES P INC | SCAC4 | ||
| 78 | HILLSIDE | 22 Hillside | USA | TRAFFIC | |
| 79 | HILM | HI-LITE MARKINGS INC | SCAC4 | ||
| 80 | HILN | HORIZON INTERNATIONAL LINES | SCAC4 | ||
| 81 | HILP | HILLTOP OIL COMPANY INC | SCAC4 | ||
| 82 | HILS | HILL TRANSPORTATION CO | PWRC | ||
| 83 | HILV | HILL TRANSPORTATION SERVICE INC | SCAC4 | ||
| 84 | HILX | Hillman Coal & Coke Co. | 7/1923 | NAKINA | |
| 85 | HILX | *HILLMAN COAL & COKE CO. | PWRC | ||
| 86 | HILX | +HILLIARD INVESTMENT, LLC | PWRC | ||
| 87 | HILX | HILLIARD INVESTMENTS LLC | SCAC4 | ||
| 88 | HIMA | HI-MYST | SCAC4 | ||
| 89 | HIMG | HILL MOVING SERVICES INC | SCAC4 | ||
| 90 | HIMR | HI-LINE MOVING SERVICES INC | SCAC4 | ||
| 91 | HIMS | HINDMAN & ISAACS MOVING & STORAGE I | SCAC4 | ||
| 92 | HIMT | HIMCO TRUCKING SERVICE INC | SCAC4 | ||
| 93 | HIMU | BASELL POLIOLEFINE ITALIA SPA | SCAC4 | ||
| 94 | HIMX | Heppner Iron & Metal Co. | added 1/1975; 1/1975-1/1980; eliminated 5/1983; eliminated 7/1988 | NAKINA | |
| 95 | HIMX | Heppner Iron & Metal Co. | added 1/75; 1/75-1/80; eliminated 5/83; eliminated 7/88 | NRHS | |
| 96 | HIMX | HEPPNER IRON & METAL CO. [HANNIBAL IRON & METAL] | PWRC | ||
| 97 | HIMX | Heppner Iron and Metal | RSRV | ||
| 98 | HIMY | HIMILAYA EXPRESS ANTWERPEN BELGIUM | SCAC4 | ||
| 99 | HIN | Holding International Group | ICAO1 | ||
| 100 | HINA | HUNTWOOD INDUSTRIES | SCAC4 |