| 2901 | HMTX | General American Transportation Corp. | 7/1937-1/1941 | NAKINA | |
| 2902 | HMTX | Hyman Michaels Tank Line, Inc. (General American Tank Car Corp.) | 7/1935 | NAKINA | |
| 2903 | HMTX | Hyman Michaels Tank Line, Inc. | 7/1930 | NAKINA | |
| 2904 | HMTX | Hyman Michaels Tank Line, Inc. (Liquids Despatch Line, Inc.) | 7/1932 | NAKINA | |
| 2905 | HMTX | Hyman Michaels Tank Line (General American Transportation Corp.) | Apr-38 | NRHS | |
| 2906 | HMTX | GENERAL AMERICAN TRANSPORTATION CORP. [LIQUIDS DESPATCH LINE, INC.] (HYMAN MICHAELS TANK LINE, INC.) | PWRC | ||
| 2907 | HMUD | HAMCO UNITED INC | SCAC4 | ||
| 2908 | HMUL | HMU LLC | SCAC4 | ||
| 2909 | HMUV | HUERTA, MANUEL TRUCKING INC | SCAC4 | ||
| 2910 | HMV | Homac Aviation | ICAO1 | ||
| 2911 | HMVA | H MOVING & STORAGE INC | SCAC4 | ||
| 2912 | HMVI | HEALY MOVERS INC | SCAC4 | ||
| 2913 | HMVQ | HILFORD MOVING & STORAGE INC | SCAC4 | ||
| 2914 | HMWB | HERITAGE MILLWORK & WINDOWS LTD | SCAC4 | ||
| 2915 | HMWC | HALTER, MICHAEL W LLC | SCAC4 | ||
| 2916 | HMWL | H & M WHOLESALE INC | SCAC4 | ||
| 2917 | HMWS | HARDI INC | SCAC4 | ||
| 2918 | HMWX | Heckett MultiServ | 7/2005 (not listed) | NAKINA | |
| 2919 | HMWX | HECKETT MULTISERV | PWRC | ||
| 2920 | HMWX | Heckett MultiServ | RSRV | ||
| 2921 | HMWX | HECKETT MULTISERV | SCAC4 | ||
| 2922 | HMX | Hawk De Mexico | ICAO1 | ||
| 2923 | HMX | Hyman-Michaels Co., a Division of Azcon Corp. | added 4/1977; 1/1980; eliminated 4/1984 | NAKINA | |
| 2924 | HMX | Hyman-Michaels Co. | 7/1930-1/1975; eliminated 4/1977 | NAKINA | |
| 2925 | HMX | Hyman-Michaels Co. | 4/38-1/75 | NRHS | |
| 2926 | HMX | Hyman-Michaels Co., a Division of Azcon Corp. | 1/80; eliminated 4/84 | NRHS | |
| 2927 | HMX | HYMAN-MICHAELS CO., DIV. AZCON CORP. | PWRC | ||
| 2928 | HMXC | HOLMER TRANSPORT INC | SCAC4 | ||
| 2929 | HMXD | HOLMES TRANSPORT LTD | SCAC4 | ||
| 2930 | HMXI | HOMELAND EXPRESS INC | SCAC4 | ||
| 2931 | HMXL | HAMMTRANS LLC | SCAC4 | ||
| 2932 | HMXO | HOMAX OIL SALES INC | SCAC4 | ||
| 2933 | HMXT | HAMMONDS TRANSPORT | SCAC4 | ||
| 2934 | HMY | Harmony Airways | IATA: HQ | ICAO1 | |
| 2935 | HMYQ | HAMMONDS | SCAC4 | ||
| 2936 | HN | Hutchinson and Northern Ry. Co. | 1/1975; added 1/1978; 1/1980; eliminated 7/1987; eliminated 10/1993; 1/1994 (not listed); 7/2000-7/2005 | NAKINA | |
| 2937 | HN | Hutchinson and Northern Ry. Co. | 1/75; added 1/78; 1/80; eliminated 7/87; eliminated 10/93; 1/94-7/2000 | NRHS | |
| 2938 | HN | HUTCHINSON & NORTHERN RAILWAY COMPANY | PWRC | ||
| 2939 | HN | Hutchinson and Northern Railway | RSRV | ||
| 2940 | HN | HUTCHINSON AND NORTHERN RAILWAY COM | SCAC4 | ||
| 2941 | HNA | Greek Navy | ICAO1 | ||
| 2942 | HNA | Henson Airlines | USA | TRAFFIC | |
| 2943 | HNAC | HAMANISHI, NANCY | SCAC4 | ||
| 2944 | HNAE | HERITAGE RELOCATION SERVICES | SCAC4 | ||
| 2945 | HNAL | HANSEN, DICK SALES INC | SCAC4 | ||
| 2946 | HNBC | HOUSTON BECNEL INC | SCAC4 | ||
| 2947 | HNBD | HARRISON, BILL N DEB | SCAC4 | ||
| 2948 | HNBN | HERMAN, BYRON | SCAC1 | ||
| 2949 | HNBN | HERMAN, BYRON | SCAC4 | ||
| 2950 | HNBO | HORN BROS INC | SCAC4 | ||
| 2951 | HNCA | HINCE TRANSPORT | SCAC4 | ||
| 2952 | HNCF | HANSEN CUSTOM FARMING | SCAC4 | ||
| 2953 | HNCH | HENSCHEN OIL INC | SCAC4 | ||
| 2954 | HNCL | HARDIN, CHARLES L TRUCKING INC | SCAC4 | ||
| 2955 | HNCM | HAULTRANS.COM | SCAC4 | ||
| 2956 | HNCP | HONCOOP TRUCKING LLC | SCAC4 | ||
| 2957 | HNCQ | HONEY CELL INC | SCAC4 | ||
| 2958 | HNCS | HUNSAKER OIL COMPANY INC | SCAC4 | ||
| 2959 | HNCY | HOHENSTEIN & COMPANY INC. | SCAC4 | ||
| 2960 | HNDE | HANDY ENTERPRISES INC | SCAC4 | ||
| 2961 | HNDF | HENDERSON FUEL CO | SCAC4 | ||
| 2962 | HNDG | HAND TRUCKING COMPANY | SCAC4 | ||
| 2963 | HNDI | HENDERSON OIL CO INC | SCAC4 | ||
| 2964 | HNDK | HENDERSON TRUCKING | SCAC4 | ||
| 2965 | HNDL | HINDERLITER TRUCKING HOME ACRES BUI | SCAC4 | ||
| 2966 | HNDM | H N D AND COMPANY | SCAC4 | ||
| 2967 | HNDN | HINDS EXPRESS INC | SCAC4 | ||
| 2968 | HNDR | HENDERSON OIL CORP | SCAC4 | ||
| 2969 | HNDS | HENDERSON, C L TRUCKING INC | SCAC4 | ||
| 2970 | HNDY | HANDY TRUCK LINE, INC | SCAC4 | ||
| 2971 | HNEJ | HOEPPNER, ERNEST J | SCAC4 | ||
| 2972 | HNES | HAINES, RAY TRUCKING LLC | SCAC4 | ||
| 2973 | HNFA | HUENEMAN FARMS LC | SCAC4 | ||
| 2974 | HNFE | HOMETOWN FUEL LLC | SCAC4 | ||
| 2975 | HNFF | HAGENS FASTER FREIGHT | SCAC4 | ||
| 2976 | HNFG | HANSON FREIGHT | SCAC1 | ||
| 2977 | HNFH | HUNTSINGER FARMS INC | SCAC4 | ||
| 2978 | HNFL | HANSEN FREIGHTLINES INC | SCAC4 | ||
| 2979 | HNFM | HANNS FARMS LTD | SCAC4 | ||
| 2980 | HNFU | H & F HOLDING | SCAC4 | ||
| 2981 | HNGA | HOENIG, GENE INC | SCAC4 | ||
| 2982 | HNGI | HANGERLOGIC INC | SCAC4 | ||
| 2983 | HNGN | HANSEN, GENE & SONS TRUCKING INC | SCAC4 | ||
| 2984 | HNGQ | HARDINGER TRANSFER CO INC | SCAC4 | ||
| 2985 | HNGR | HUNGAROS FREIGHT SYSTEMS INC | SCAC4 | ||
| 2986 | HNGS | H & G TRANSPORTATION SERVICE INC | SCAC4 | ||
| 2987 | HNGT | HUNGAROS TRANSPORTISTAS S A DE C V | SCAC4 | ||
| 2988 | HNGY | HADDEN, GARY | SCAC4 | ||
| 2989 | HNHA | HAT N HAT TRANSPORT LLC | SCAC4 | ||
| 2990 | HNHB | HIS N HERS TRUCK BROKER | SCAC4 | ||
| 2991 | HNHC | H & H TRUCKING INC | SCAC4 | ||
| 2992 | HNHD | H&H DISTRIBUTORS | SCAC1 | ||
| 2993 | HNHD | H & H DISTRIBUTORS | SCAC4 | ||
| 2994 | HNHK | HNH TRUCKING LLC | SCAC4 | ||
| 2995 | HNHN | HOOVES N HOUNDS HORSE TRANSPORT | SCAC4 | ||
| 2996 | HNHO | HAUL-N HOLMEN | SCAC4 | ||
| 2997 | HNHP | H & H PRODUCE | SCAC4 | ||
| 2998 | HNHR | HIS AND HERS TRANSPORTATION INC | SCAC4 | ||
| 2999 | HNIF | HENIFF TRANSPORTATION SYSTEMS LLC | SCAC4 | ||
| 3000 | HNIQ | HOLDGATES NURSERY INC | SCAC4 |