| 1 | HM | Hasselmann GmbH | DE | VKM | |
| 2 | HMA | Air Tahoma | ICAO1 | ||
| 3 | HMAA | HAL-MARI INC | SCAC4 | ||
| 4 | HMAB | HIGH MOUNTAIN TRANSPORT INC | SCAC4 | ||
| 5 | HMAD | HARDIN DELIVERY INC | SCAC4 | ||
| 6 | HMAE | H M TRUCKING | SCAC4 | ||
| 7 | HMAF | British Armed Forces | Her Majesty's Armed Forces | GB | TRAFFIC |
| 8 | HMAG | HOME AGAIN INC | SCAC4 | ||
| 9 | HMAH | HERBERT, MARCIA | SCAC4 | ||
| 10 | HMAI | HAMORI AUTO INC | SCAC4 | ||
| 11 | HMAL | HARMAC AMERICA INC | SCAC4 | ||
| 12 | HMAM | HER-MAN TRANSFER | SCAC4 | ||
| 13 | HMAN | H. Manhart GmbH | AT | VKM | |
| 14 | HMAO | HUNTSVILLE MARINE AND RECREATION | SCAC4 | ||
| 15 | HMAP | HARDESTY MOVING AND STORAGE CORP | SCAC4 | ||
| 16 | HMAQ | H M TRANSPORT | SCAC4 | ||
| 17 | HMAR | HOMAR ENTERPRISES LIMITED | SCAC4 | ||
| 18 | HMAS | HOMAN, D S | SCAC4 | ||
| 19 | HMAX | Huntsman Petrochemical Corp. | added 4/2003; 7/2005 | NAKINA | |
| 20 | HMAX | Huntsman Corp. | added 4/1996; 7/2000; eliminated 4/2003 | NAKINA | |
| 21 | HMAX | Huntsman Specialty Chemicals Corp. | added 7/1994; eliminated 4/1996 | NAKINA | |
| 22 | HMAX | Huntsman Specialty Chemicals Corp. | added 7/94; eliminated 4/96 | NRHS | |
| 23 | HMAX | Huntsman Corp. | added 4/96; 7/2000 | NRHS | |
| 24 | HMAX | HUNTSMAN SPECIALTY CHEMICALS CORPORATION (HUNTSMAN PETROCHEMICAL) | PWRC | ||
| 25 | HMAX | Huntsman Petrochemical | RSRV | ||
| 26 | HMAX | HUNTSMAN PETROCHEMICAL CORPORATION | SCAC4 | ||
| 27 | HMAY | HASKELL, M A & SONS LLC | SCAC4 | ||
| 28 | HMB | Härtsfeld-Museumsbahn e.V. | Neresheim | D | privat-bahn.de |
| 29 | HMBAU | H&M Bau GmbH | DE | VKM | |
| 30 | HMBC | HAMBONE TRUCKING LLC | SCAC4 | ||
| 31 | HMBD | HAMILTON CONSTRUCTION LLC | SCAC4 | ||
| 32 | HMBE | HAMMONIA REEDERE | SCAC4 | ||
| 33 | HMBI | HOMAN & CO INC | SCAC4 | ||
| 34 | HMBK | H M B TRUCKING | SCAC4 | ||
| 35 | HMBS | HALCOMB, R & J TRANSPORTATION INC | SCAC4 | ||
| 36 | HMBX | HELM Financial Corp. | added 1/2007 | NAKINA | |
| 37 | HMBX | HELM FINANCIAL CORP. | PWRC | ||
| 38 | HMBX | HELM FINANCIAL CORPORATION | SCAC4 | ||
| 39 | HMBY | H & M BAY INC | SCAC4 | ||
| 40 | HMBZ | HELLMANS BREWING CO. | PWRC | ||
| 41 | HMC | Heliamerica De Mexico | ICAO1 | ||
| 42 | HMCA | HOFFER, PETER CONTEMPORARY ART INC | SCAC4 | ||
| 43 | HMCD | HERMAN FARM | SCAC4 | ||
| 44 | HMCE | HIS MAJESTY COACHES INC | SCAC4 | ||
| 45 | HMCG | H M C TRANSPORTATION INC | SCAC4 | ||
| 46 | HMCH | HEARTLAND MOTOR COACH INC | SCAC4 | ||
| 47 | HMCI | HEWES MARINE CO INC | SCAC4 | ||
| 48 | HMCJ | HAGIE MANUFACTURING CO INC | SCAC4 | ||
| 49 | HMCO | HAIRE MACHINE CORPORATION | SCAC4 | ||
| 50 | HMCP | HENKE MANUFACTURING CORPORATION | SCAC4 | ||
| 51 | HMCQ | H & M CONTAINER TRANSPORT INC | SCAC4 | ||
| 52 | HMCR | The Huntsville and Madison County R.R. Authority | added 7/1985; 1/1994; eliminated 4/1997; 7/2000-7/2005 | NAKINA | |
| 53 | HMCR | The Huntsville and Madison County R.R. Authority | 1/94; eliminated 4/97; 7/2000 | NRHS | |
| 54 | HMCR | HUNTSVILLE & MADISON COUNTY RR AUTHORITY | PWRC | ||
| 55 | HMCR | Huntsville and Madison County Railroad | RSRV | ||
| 56 | HMCT | HAMILL CREEK TIMBERWRIGHTS INC | SCAC4 | ||
| 57 | HMCU | HATSU MARINE LTD | SCAC4 | ||
| 58 | HMCX | SC Rail Leasing America, Inc. d/b/a Southern Illinois Railcar Co. | added 1/2008 | NAKINA | |
| 59 | HMCX | Southern Illinois Railcar Co. | added 4/2004; 7/2005; eliminated 1/2008 | NAKINA | |
| 60 | HMCX | HoltraChem Manufacturing Co., L.L.C. | added 7/1995; eliminated 7/1997; 7/2000 (not listed) | NAKINA | |
| 61 | HMCX | HoltraChem Manufacturing Co., L.L.C. | added 7/95; eliminated 7/97; 7/2000 | NRHS | |
| 62 | HMCX | *HOLTRACHEM MANUFACTURING CO., LLC | PWRC | ||
| 63 | HMCX | +SC RAIL LEASING AMERICA d/b/a SOUTHERN ILLINOIS RAILCAR CO. | PWRC | ||
| 64 | HMCX | HoltraChem Manufacturing | RSRV | ||
| 65 | HMCX | VTG RAIL INC | SCAC4 | ||
| 66 | HMCY | HOFFMANN MACHINE COMPANY INC | SCAC4 | ||
| 67 | HMD | Charlie Hammonds Flying Service | ICAO1 | ||
| 68 | HMDA | HAMEL, DAVID INC | SCAC4 | ||
| 69 | HMDC | HAGAN, M D TRUCKING CO | SCAC4 | ||
| 70 | HMDD | HUNT, J B TRANSPORT INC | SCAC4 | ||
| 71 | HMDE | HOMEDICS INC | SCAC4 | ||
| 72 | HMDK | HAM, D & K TRUCKING LTD | SCAC4 | ||
| 73 | HMDR | H & M DELIVERY SERVICE | SCAC4 | ||
| 74 | HMDT | HMD TRUCKING INC | SCAC4 | ||
| 75 | HMEA | HAMME | SCAC4 | ||
| 76 | HMEC | HART MOTOR EXPRESS INC | PWRC | ||
| 77 | HMEC | HELADOS MEXICO | SCAC4 | ||
| 78 | HMED | H & M | SCAC4 | ||
| 79 | HMEI | HAMILTON EQUIPMENT INC | SCAC4 | ||
| 80 | HMEL | HAMEL, LEO | SCAC4 | ||
| 81 | HMEM | HAMM | SCAC4 | ||
| 82 | HMER | HOME RUN INC | SCAC4 | ||
| 83 | HMES | HOLLAND MOTOR EXPRESS INC. | PWRC | ||
| 84 | HMES | USF HOLLAND, INC | SCAC3 | ||
| 85 | HMES | HOLLAND MOTOR EXPRESS INC (USF HOLL | SCAC4 | ||
| 86 | HMET | Metropolitan Transit Authority of Harris County | City: Houston | US- | TRAFFIC |
| 87 | HMEV | HAZ-MAT ENVIRONMENTAL SERVICES LLC | SCAC4 | ||
| 88 | HMF | Norrlandsflyg | ICAO1 | ||
| 89 | HMFA | HEARTLAND MOTOR FREIGHT INC | SCAC4 | ||
| 90 | HMFE | HIRSCH MOTOR FREIGHT | SCAC4 | ||
| 91 | HMFG | HAMMOND MANUFACTURING COMPANY LIMIT | SCAC4 | ||
| 92 | HMFH | HSC MOTOR FREIGHT | SCAC4 | ||
| 93 | HMFM | H & M FARMS LTD | SCAC4 | ||
| 94 | HMFR | HIGHLIGHT MOTOR FREIGHT INC | SCAC4 | ||
| 95 | HMFT | HOMEFRONT TRANSPORT INC | SCAC4 | ||
| 96 | HMFX | Vulcan Materials Co. | added 4/2008? | NAKINA | |
| 97 | HMFX | Florida Rock Industries, Inc. | added 4/1977; 1/1980; eliminated 5/1983; 1/1994-7/2005 (not listed) | NAKINA | |
| 98 | HMFX | Century Industries | added 10/1971; 1/1975; eliminated 4/1977 | NAKINA | |
| 99 | HMFX | Century Industries | added 10/71; 1/75 | NRHS | |
| 100 | HMFX | Florida Rock Industries, Inc. | 1/80; eliminated 5/83; 1/94-7/2000 | NRHS |