| 3701 | HODQ | HODGES, ED F INC | | | SCAC4 |
| 3702 | HODT | HBX INC | | | SCAC4 |
| 3703 | HOE | G.Hölzig | | DE | VKM |
| 3704 | HOEC | HOLIDAY EXPRESS CORPORATION | | | SCAC4 |
| 3705 | HOEE | HOLMES FREIGHT LINES INC | | | SCAC4 |
| 3706 | HOEG | HOEGH AUTOLINERS AS | | | SCAC4 |
| 3707 | HOEH | HOEGH, DANIEL | | | SCAC4 |
| 3708 | HOEI | HOLMES OIL CO INC | | | SCAC4 |
| 3709 | HOEL | HOTWHEELS TRUCKING | | | SCAC4 |
| 3710 | HOEP | HOEPPNER, DOUGLAS M A | | | SCAC4 |
| 3711 | HOES | HOESE TRUCKING | | | SCAC4 |
| 3712 | HOEU | HOECHST AKTIENGESELLSCHAFT | | | PWRC |
| 3713 | HOEU | Hoechst Aktiengesellschaft | | | RSRV |
| 3714 | HOEU | HOECHST AKTIENGESELLSCHAFT | | | SCAC4 |
| 3715 | HOFF | Manfred Hoffmann Baumaschinen Industrieservice | | DE | VKM |
| 3716 | HOFFM | Hoffmann Erdbau Straenbau Tiefbau GmbH & Co. KG | | DE | VKM |
| 3717 | HOFI | HOFFMAN TRANSIT COMPANY INC | | | SCAC4 |
| 3718 | HOFL | HOLMES FREIGHT LINES, INC | | | SCAC1 |
| 3719 | HOFL | HOLMES FREIGHT LINES, INC | | | SCAC4 |
| 3720 | HOFM | HOFFMANN TRUCKING | | | SCAC4 |
| 3721 | HOFQ | HOFF BROS. CARTAGE, INC | | | SCAC1 |
| 3722 | HOFQ | HERCULES OILFIELD CONSTRUCTION INC | | | SCAC4 |
| 3723 | HOFU | HOFER TANKTRANSPORTE AG | | CH | BIC |
| 3724 | HOFU | HOFER TANKTRANSPORTE AG | | | SCAC4 |
| 3725 | HOG | Arkansas Traveler Airline | Callsign: Hog-Air, | USA | AVCODES |
| 3726 | HOG | Mahogany Air Charters | IATA: KT, Callsign: Hogan Air, Suspended operations in 2014. | Z | AVCODES |
| 3727 | HOG | Heart of Georgia R.R., Inc. | 7/2000-7/2005 | | NAKINA |
| 3728 | HOG | Heart of Georgia R.R., Inc. | Jul-00 | | NRHS |
| 3729 | HOG | HEART OF GEORGIA RAILROAD | | | PWRC |
| 3730 | HOG | Heart of Georgia Railroad | | | RSRV |
| 3731 | HOG | HEART OF GEORGIA RAILROAD INC | | | SCAC4 |
| 3732 | HOG | Heart of Georgia | | USA | TRAFFIC |
| 3733 | HOGD | HOGAN DEDICATED SERVICES LLC | | | SCAC4 |
| 3734 | HOGE | HOGEMANN TRANSPORT LTD | | | SCAC4 |
| 3735 | HOGH | HOSIEN, GHASSAN | | | SCAC4 |
| 3736 | HOGL | HOAGLAND'S TRANSPORT SERVICE, INC. | | | SCAC1 |
| 3737 | HOGL | HOAGLANDS TRANSPORT SERVICE, INC | | | SCAC4 |
| 3738 | HOGT | HOGLAND TRANSFER CO | | | SCAC1 |
| 3739 | HOGW | HOG WILD TRANSPORT | | | SCAC4 |
| 3740 | HOGX | Clougherty Packing Co. | added 1/1990; 1/1994; eliminated 4/1997 | | NAKINA |
| 3741 | HOGX | Harlis Oil & Gas Co. | 7/1923 | | NAKINA |
| 3742 | HOGX | Clougherty Packing Co. | added 1/90; 1/94; eliminated 4/97 | | NRHS |
| 3743 | HOGX | *HARLIS OIL & GAS CO. | | | PWRC |
| 3744 | HOGX | *CLOUGHERTY PACKING | | | PWRC |
| 3745 | HOGX | *UNION PACIFIC RAILROAD | | | PWRC |
| 3746 | HOGX | Harlis Oil & Gas (Union Pacific Railroad) | | | RSRV |
| 3747 | HOHF | HOSS, H F | | | SCAC4 |
| 3748 | HOHI | H M H TRANSPORTATION INC | | | SCAC4 |
| 3749 | HOHL | HOHL'S PROPANE EXPRESS INC | | | SCAC4 |
| 3750 | HOHM | HOHMANN, A & CO INC | | | SCAC4 |
| 3751 | HOHQ | HOLTON OIL CO | | | SCAC4 |
| 3752 | HOIA | H'OMEGA INC | | | SCAC4 |
| 3753 | HOIC | HOLIDAY ON ICE | | | PWRC |
| 3754 | HOIC | HORNE OIL COMPANY | | | SCAC4 |
| 3755 | HOIG | HOGBINS OIL INC | | | SCAC4 |
| 3756 | HOII | HERBST OIL INC | | | SCAC4 |
| 3757 | HOIL | H OIL INC | | | SCAC4 |
| 3758 | HOJ | Horsens - Odder Jernbane | 1904 - 1967 | DK | jernbanen.dk |
| 3759 | HOJ | Horsens - Odder Jernbane | 1904 - 1967 | DK | TRAFFIC |
| 3760 | HOJO | Hojo Railway Company | | J | TRAFFIC |
| 3761 | HOK | Hokuetsu Express Co., Ltd. | | J | TRAFFIC |
| 3762 | HOKC | HASKO TRUCKING INC | | | SCAC4 |
| 3763 | HOKG | HARCO TRUCKING LLC | | | SCAC4 |
| 3764 | HOKKB | Hokkaido Bus Co. | | J | TRAFFIC |
| 3765 | HOKKO | Hokko Kanko Bus | | J | TRAFFIC |
| 3766 | HOKL | HOMELAND TRUCK LINES | | | SCAC4 |
| 3767 | HOKS | Hokuso Railway | | J | TRAFFIC |
| 3768 | HOKU | Hokuetsu | | J | TRAFFIC |
| 3769 | HOKX | Occidental Chemical Corp. | added 1/1992; 1/1994-7/2005 | | NAKINA |
| 3770 | HOKX | Occidental Chemical Corp., Electrochemicals & Specialty Products | added 10/1989; eliminated 1/1992 | | NAKINA |
| 3771 | HOKX | Occidental Chemical Corp., Electrochemicals, Detergents & Specialty Products | added 1/1988; eliminated 10/1989 | | NAKINA |
| 3772 | HOKX | Occidental Chemical Corp., Electrochemicals, Detergent & Specialty Products Group | added 7/1987; eliminated 1/1988 | | NAKINA |
| 3773 | HOKX | Occidental Chemical Corp., Industrial & Specialty Chemicals | added 7/1984; eliminated 7/1987 | | NAKINA |
| 3774 | HOKX | Occidental Chemical Corp., Hooker Industrial & Specialty Chemicals | added 10/1982; eliminated 7/1984 | | NAKINA |
| 3775 | HOKX | Hooker Chemicals and Plastics Corp. | added 7/1974; 1/1975-1/1980; eliminated 10/1982 | | NAKINA |
| 3776 | HOKX | Hooker Chemical Corp. | added 10/1958; 4/1961-4/1970; eliminated 7/1974 | | NAKINA |
| 3777 | HOKX | Hooker Electrochemical Co. | 7/1930-10/1957; eliminated 10/1958 | | NAKINA |
| 3778 | HOKX | Hooker Electrochemical Co. | 4/38-10/57; eliminated 10/58 | | NRHS |
| 3779 | HOKX | Hooker Chemical Corp. | added 10/58; 4/61-4/70 | | NRHS |
| 3780 | HOKX | Hooker Chemicals and Plastics Corp. | 1/75-1/80; eliminated 10/82 | | NRHS |
| 3781 | HOKX | Occidental Chemical Corp., Hooker Industrial & Specialty Chemicals | added 10/82; eliminated 7/84 | | NRHS |
| 3782 | HOKX | Occidental Chemical Corp., Industrial & Specialty Chemicals | added 7/84; eliminated 7/87 | | NRHS |
| 3783 | HOKX | Occidental Chemical Corp., Electrochemicals, Detergent & Specialty Products Group | added 7/87; eliminated 1/88 | | NRHS |
| 3784 | HOKX | Occidental Chemical Corp., Electrochemicals, Detergents & Specialty Products | added 1/88; eliminated 10/89 | | NRHS |
| 3785 | HOKX | Occidental Chemical Corp., Electrochemicals & Specialty Products | added 10/89; eliminated 1/92 | | NRHS |
| 3786 | HOKX | Occidental Chemical Corp. | added 1/92; 1/94-7/2000 | | NRHS |
| 3787 | HOKX | HOOKER INDUSTRIAL & SPECIALTY CHEMICALS (OCCIDENTAL CHEMICAL CORP.) | | | PWRC |
| 3788 | HOKX | Hooker Chemical (Occidental Chemical Corporation) | | | RSRV |
| 3789 | HOKX | OCCIDENTAL CHEMICAL CORP., AGRICULT | | | SCAC4 |
| 3790 | HOKX | Occidental Chemical Corporation | | USA | TRAFFIC |
| 3791 | HOL | Holiday Airlines, Inc. | Callsign: Holiday, | USA | AVCODES |
| 3792 | HOL | Holiday Airlines | | | ICAO1 |
| 3793 | HOLA | HOLIDAY TRUCKING L L C | | | SCAC4 |
| 3794 | HOLB | Hollinger Bus Lines | | CDN | TRAFFIC |
| 3795 | HOLC | HEATWAVE OIL LLC | | | SCAC4 |
| 3796 | HOLCH | Holcim (Schweiz) AG | | CH | TRAFFIC |
| 3797 | HOLCH | Holcim (Schweiz) AG | | CH | VKM |
| 3798 | HOLD | HOLDEN TRUCKING INC | | | SCAC4 |
| 3799 | HOLE | HOLSTINE, R R LLC | | | SCAC4 |
| 3800 | HOLF | HOFFMAN, LENNY EXCAVATING INC | | | SCAC4 |
