| 1 | HO | Hoogovens (Corus) | NL | TRAFFIC | |
| 2 | HOA | Hola Airlines | IATA: H5 | ICAO1 | |
| 3 | HOAG | HOAGLANDS TRANSPORT SERIVCE | SCAC4 | ||
| 4 | HOAK | HOMESTEAD MORGANS | SCAC4 | ||
| 5 | HOAL | HOT SHOT FREIGHT | SCAC4 | ||
| 6 | HOAM | HOLM TRUCKING INC | SCAC4 | ||
| 7 | HOAP | HOWARD & SONS TRUCKING INC | SCAC4 | ||
| 8 | HOAQ | HOFFMAN | SCAC4 | ||
| 9 | HOAS | HOUSE, JASON D TRUCKING LLC | SCAC4 | ||
| 10 | HOB | HENDERSON OVERTON BRANCH | SCAC4 | ||
| 11 | HOB | Hoboken Transportation | USA | TRAFFIC | |
| 12 | HOBB | HOBBS TRUCKING CO | SCAC1 | ||
| 13 | HOBBY | Hobbytrain | X | TRAFFIC | |
| 14 | HOBE | HORIZON ENERGY TRANSPORT LLC | SCAC4 | ||
| 15 | HOBI | HODGEN BUTANE INC | SCAC4 | ||
| 16 | HOBL | HOBBS, LARRY FARM EQUIPMENT INC | SCAC4 | ||
| 17 | HOBR | HOBBY TRUCKING | SCAC4 | ||
| 18 | HOBU | HOLVRIEKA BV | SCAC4 | ||
| 19 | HOBY | HONEOYE AUTO PARTS | SCAC4 | ||
| 20 | HOC | CHOCTAW TRANSPORT INC | SCAC4 | ||
| 21 | HOCA | HANCOR OF CANADA INC | SCAC4 | ||
| 22 | HOCB | HALCOMB OIL CO | SCAC4 | ||
| 23 | HOCC | HOME OIL CO INC | SCAC4 | ||
| 24 | HOCE | HOC-EXPRESS, INC | SCAC1 | ||
| 25 | HOCE | HOC EXPRESS INC | SCAC4 | ||
| 26 | HOCF | HERSHBERGER OIL COMPANY LLC | SCAC4 | ||
| 27 | HOCG | HOC TRUCKING INC | SCAC4 | ||
| 28 | HOCI | HENRY OIL CO INC | SCAC4 | ||
| 29 | HOCK | HOCKER OIL COMPANY | SCAC4 | ||
| 30 | HOCM | HARBERT OIL COMPANY INC | SCAC4 | ||
| 31 | HOCO | HOKENBROUGH, M D TRUCKING INC | SCAC4 | ||
| 32 | HOCQ | H CARGO LINES | SCAC4 | ||
| 33 | HOCR | HANSEN OIL COMPANY | SCAC4 | ||
| 34 | HOCU | HOEGH CONTAINER LINES | PWRC | ||
| 35 | HOCU | Hoegh Container Lines | RSRV | ||
| 36 | HOCX | Hunt Oil Co. | 1/1943-1/1946 | NAKINA | |
| 37 | HOCX | Head-On Collision Line | added 4/1957; 10/1957-1/1980; eliminated 1/1991 | NAKINA | |
| 38 | HOCX | Head-On Collision Line | added 4/57; 10/57-1/80; eliminated 1/91 | NRHS | |
| 39 | HOCX | *HUNT OIL CO. | PWRC | ||
| 40 | HOCX | *HEAD-ON COLLISION LINE | PWRC | ||
| 41 | HOCX | Head-On Collision Line | RSRV | ||
| 42 | HODA | HOLIDAY TOURS INC | SCAC4 | ||
| 43 | HODG | HODGE, PETER TRANSPORT LIMITED | SCAC4 | ||
| 44 | HODM | Hód-Mez? | City: Hódmezõvásárhely | H | TRAFFIC |
| 45 | HODO | HOWARD DEDICATED OPERATIONS INC | SCAC4 | ||
| 46 | HODQ | HODGES, ED F INC | SCAC4 | ||
| 47 | HODT | HBX INC | SCAC4 | ||
| 48 | HOE | G.Hölzig | DE | VKM | |
| 49 | HOEC | HOLIDAY EXPRESS CORPORATION | SCAC4 | ||
| 50 | HOEE | HOLMES FREIGHT LINES INC | SCAC4 | ||
| 51 | HOEG | HOEGH AUTOLINERS AS | SCAC4 | ||
| 52 | HOEH | HOEGH, DANIEL | SCAC4 | ||
| 53 | HOEI | HOLMES OIL CO INC | SCAC4 | ||
| 54 | HOEL | HOTWHEELS TRUCKING | SCAC4 | ||
| 55 | HOEP | HOEPPNER, DOUGLAS M A | SCAC4 | ||
| 56 | HOES | HOESE TRUCKING | SCAC4 | ||
| 57 | HOEU | HOECHST AKTIENGESELLSCHAFT | PWRC | ||
| 58 | HOEU | Hoechst Aktiengesellschaft | RSRV | ||
| 59 | HOEU | HOECHST AKTIENGESELLSCHAFT | SCAC4 | ||
| 60 | HOFF | Manfred Hoffmann Baumaschinen Industrieservice | DE | VKM | |
| 61 | HOFFM | Hoffmann Erdbau Straenbau Tiefbau GmbH & Co. KG | DE | VKM | |
| 62 | HOFI | HOFFMAN TRANSIT COMPANY INC | SCAC4 | ||
| 63 | HOFL | HOLMES FREIGHT LINES, INC | SCAC1 | ||
| 64 | HOFL | HOLMES FREIGHT LINES, INC | SCAC4 | ||
| 65 | HOFM | HOFFMANN TRUCKING | SCAC4 | ||
| 66 | HOFQ | HOFF BROS. CARTAGE, INC | SCAC1 | ||
| 67 | HOFQ | HERCULES OILFIELD CONSTRUCTION INC | SCAC4 | ||
| 68 | HOFU | HOFER TANKTRANSPORTE AG | SCAC4 | ||
| 69 | HOG | Heart of Georgia R.R., Inc. | 7/2000-7/2005 | NAKINA | |
| 70 | HOG | Heart of Georgia R.R., Inc. | Jul-00 | NRHS | |
| 71 | HOG | HEART OF GEORGIA RAILROAD | PWRC | ||
| 72 | HOG | Heart of Georgia Railroad | RSRV | ||
| 73 | HOG | HEART OF GEORGIA RAILROAD INC | SCAC4 | ||
| 74 | HOG | Heart of Georgia | USA | TRAFFIC | |
| 75 | HOGD | HOGAN DEDICATED SERVICES LLC | SCAC4 | ||
| 76 | HOGE | HOGEMANN TRANSPORT LTD | SCAC4 | ||
| 77 | HOGH | HOSIEN, GHASSAN | SCAC4 | ||
| 78 | HOGL | HOAGLAND'S TRANSPORT SERVICE, INC. | SCAC1 | ||
| 79 | HOGL | HOAGLANDS TRANSPORT SERVICE, INC | SCAC4 | ||
| 80 | HOGT | HOGLAND TRANSFER CO | SCAC1 | ||
| 81 | HOGW | HOG WILD TRANSPORT | SCAC4 | ||
| 82 | HOGX | Clougherty Packing Co. | added 1/1990; 1/1994; eliminated 4/1997 | NAKINA | |
| 83 | HOGX | Harlis Oil & Gas Co. | 7/1923 | NAKINA | |
| 84 | HOGX | Clougherty Packing Co. | added 1/90; 1/94; eliminated 4/97 | NRHS | |
| 85 | HOGX | *HARLIS OIL & GAS CO. | PWRC | ||
| 86 | HOGX | *CLOUGHERTY PACKING | PWRC | ||
| 87 | HOGX | *UNION PACIFIC RAILROAD | PWRC | ||
| 88 | HOGX | Harlis Oil & Gas (Union Pacific Railroad) | RSRV | ||
| 89 | HOHF | HOSS, H F | SCAC4 | ||
| 90 | HOHI | H M H TRANSPORTATION INC | SCAC4 | ||
| 91 | HOHL | HOHL'S PROPANE EXPRESS INC | SCAC4 | ||
| 92 | HOHM | HOHMANN, A & CO INC | SCAC4 | ||
| 93 | HOHQ | HOLTON OIL CO | SCAC4 | ||
| 94 | HOIA | H'OMEGA INC | SCAC4 | ||
| 95 | HOIC | HOLIDAY ON ICE | PWRC | ||
| 96 | HOIC | HORNE OIL COMPANY | SCAC4 | ||
| 97 | HOIG | HOGBINS OIL INC | SCAC4 | ||
| 98 | HOII | HERBST OIL INC | SCAC4 | ||
| 99 | HOIL | H OIL INC | SCAC4 | ||
| 100 | HOJ | Horsens - Odder Jernbane | 1904 - 1967 | DK | jernbanen.dk |