| 2001 | HIPA | HIGH PLAINS ALPACAS LTD | SCAC4 | ||
| 2002 | HIPL | HI-PLAINS SUNFLOWER CO LLC | SCAC4 | ||
| 2003 | HIPP | HIPP, JOHN C INC | SCAC4 | ||
| 2004 | HIPX | NRG Energy, Inc. | added 10/2006 | NAKINA | |
| 2005 | HIPX | Texas Genco II, LP | added 7/2005; 7/2005; eliminated 10/2006 | NAKINA | |
| 2006 | HIPX | Texas Genco, LP | added 10/2004; eliminated 7/2005 | NAKINA | |
| 2007 | HIPX | Reliant Energy HL&P | added 7/2000; 7/2000; eliminated 10/2004 | NAKINA | |
| 2008 | HIPX | Houston Lighting & Power Co. | eliminated 7/2000 | NAKINA | |
| 2009 | HIPX | Hawkeye Produce Co. | 1/1952; eliminated 1/1953 | NAKINA | |
| 2010 | HIPX | Hawkeye Produce Co. | 1/52; eliminated 1/53 | NRHS | |
| 2011 | HIPX | Houston Lighting & Power Co. | eliminated 7/2000 | NRHS | |
| 2012 | HIPX | Reliant Energy HL&P | added 7/2000; 7/2000 | NRHS | |
| 2013 | HIPX | *HAWKEYE PRODUCE CO. | PWRC | ||
| 2014 | HIPX | +NRG ENERGY [TEXAS GENCO, LP; RELIANT ENERGY HL&P; HOUSTON INDUSTRIES INC - HOUSTON LIGHTING AND POWER CO] | PWRC | ||
| 2015 | HIPX | Reliant Energy HL and P | RSRV | ||
| 2016 | HIPX | NRG ENERGY INC | SCAC4 | ||
| 2017 | HIR | HOLTON INTERURBAN RAILWAY CO. | PWRC | ||
| 2018 | HIRA | HI-REL ALLOYS LTD | SCAC4 | ||
| 2019 | HIRB | HIRD, BILL | SCAC4 | ||
| 2020 | HIRC | HOUSTON INTERMODAL RESOURCES LLC | SCAC4 | ||
| 2021 | HIRI | HIRAI TRUCKING | SCAC1 | ||
| 2022 | HIRM | HIRAM ENTERPRISES INC | SCAC4 | ||
| 2023 | HIRO | HILL-ROM LOGISTICS LLC | SCAC4 | ||
| 2024 | HIRO | City: Hiroshima | J | TRAFFIC | |
| 2025 | HIROD | Hiroshima Electric Railway | J | TRAFFIC | |
| 2026 | HIROS | City: Hiroshima | J | TRAFFIC | |
| 2027 | HIRR | Hainesport Industrial R.R. LLC | added 4/2006 | NAKINA | |
| 2028 | HIRR | HAINESPORT INDUSTRIAL RAILROAD, LLC | PWRC | ||
| 2029 | HIRR | HAINESPORT INDUSTRIAL RAILROAD LLC | SCAC4 | ||
| 2030 | HIRS | HIRSCHBACH MOTOR LINES INC | SCAC4 | ||
| 2031 | HIRT | HIRT, JIM TRUCKING INC | SCAC4 | ||
| 2032 | HIRX | TRANSPORTATION SERVICES AND EQUIPME | SCAC4 | ||
| 2033 | HIS | Hispaniola Airways | ICAO1 | ||
| 2034 | HISE | HILTON-SPENCERPORT EXPRESS, INC | SCAC1 | ||
| 2035 | HISH | HISHON, C I INC | SCAC4 | ||
| 2036 | HISI | HIGH SIERRA EXPRESS-McLAUGHLIN DRAYING COMPANY, INC | SCAC1 | ||
| 2037 | HISI | HERNANDEZ, ISIDRO | SCAC4 | ||
| 2038 | HISN | HILLCREST SYSTEMS CANADA | SCAC4 | ||
| 2039 | HISP | HISPEED TRANSPORT INC | SCAC4 | ||
| 2040 | HISP | Hispano Carrocera, S.A. | E | TRAFFIC | |
| 2041 | HISS | HIGH INCIDENT SAFEGUARD SOLUTIONS I | SCAC4 | ||
| 2042 | HIT | Helitalia | ICAO1 | ||
| 2043 | HIT | HIT Holzindustrie Torgau OHG | DE | VKM | |
| 2044 | HITC | HILLSBORO TRANSPORTATION COMPANY | SCAC1 | ||
| 2045 | HITE | HI-TEC INTERVENTION INC | SCAC4 | ||
| 2046 | HITI | HADDAD INTERNATIONAL TRANSPORT INC | SCAC4 | ||
| 2047 | HITM | HOLLAND INGREDIENT TRANSPORT INC | SCAC4 | ||
| 2048 | HITO | HILLTOP FREIGHT | SCAC4 | ||
| 2049 | HITP | HANKYU HANSHIN EXPRESS (USA) INC | SCAC4 | ||
| 2050 | HITQ | HI TECH TRUCKING INC | SCAC4 | ||
| 2051 | HITR | HILLIS TRANSPORT LLC | SCAC4 | ||
| 2052 | HITS | Hitachinaka Railway | J | TRAFFIC | |
| 2053 | HITW | HITECHWAY TRUCK LINES INC | SCAC4 | ||
| 2054 | HIVM | HIDDEN VALLEY MOVING & STORAGE OF C | SCAC4 | ||
| 2055 | HIWA | HOLE IN THE WALL FARMS | SCAC4 | ||
| 2056 | HIWP | HI-WAY NINE (9) EXPRESS LTD | SCAC4 | ||
| 2057 | HIWR | HIWAY EXPRESS | SCAC1 | ||
| 2058 | HIWR | HIWAY EXPRESS | SCAC4 | ||
| 2059 | HIWU | HOLLAND INTERNATIONAL WAREHOUSING | SCAC4 | ||
| 2060 | HIXJ | HIX, JOE TRUCKING INC | SCAC4 | ||
| 2061 | HIZ | HARLEM INDUSTRIES | PWRC | ||
| 2062 | HJA | Air Haiti | ICAO1 | ||
| 2063 | HJA | Hjørring - Ålbæk | 1925 | DK | TRAFFIC |
| 2064 | HJAC | HANSON, JOHN A CO, INC | SCAC4 | ||
| 2065 | HJAS | HERMANSON TRUCKING | SCAC4 | ||
| 2066 | HJAT | HINOJOSA, ANTONIO | SCAC4 | ||
| 2067 | HJAV | HARALSON, J A MOVING & STORAGE INC | SCAC4 | ||
| 2068 | HJBB | HUNT, J B TRANSPORT INC (ICS DIVISI | SCAC4 | ||
| 2069 | HJBD | HJB DISTRIBUTORS LLC | SCAC4 | ||
| 2070 | HJBF | HJB AIR FREIGHT INC | SCAC4 | ||
| 2071 | HJBI | HUNT, J B TRANSPORT INC | SCAC4 | ||
| 2072 | HJBL | HUNT, J B LOGISTICS INC | SCAC4 | ||
| 2073 | HJBR | HUNT, J B TRANSPORT INC (ICS REEFER | SCAC4 | ||
| 2074 | HJBT | HUNT, J. B., TRANSPORT, INC. | SCAC1 | ||
| 2075 | HJBT | HUNT, J B TRANSPORT INC | SCAC4 | ||
| 2076 | HJBX | H.J. Baker & Bro., Inc. | added 10/1981; eliminated 1/1982; 1/1994-7/2005 (not listed) | NAKINA | |
| 2077 | HJBX | H.J. Baker & Bro., Inc. | added 10/81; eliminated 1/82; 1/94-7/2000 | NRHS | |
| 2078 | HJBX | H. J. BAKER & BROS., INC. | PWRC | ||
| 2079 | HJBX | H.J. Baker and Brothers | RSRV | ||
| 2080 | HJBX | H J BAKER & BROS INC | SCAC4 | ||
| 2081 | HJCC | HAMILTON, JAMES CONSTRUCTION CO | SCAC4 | ||
| 2082 | HJCE | HIPP, JOHN C CONSTRUCTION EQUIPMENT | SCAC4 | ||
| 2083 | HJCI | HARRIS, JEFF CO INC | SCAC4 | ||
| 2084 | HJCM | HANGER, JAMES C | SCAC4 | ||
| 2085 | HJCN | HILDEBRAND, JASON CREATIVE | SCAC4 | ||
| 2086 | HJCO | HALJOE COACHES USA | SCAC4 | ||
| 2087 | HJCP | HICKS, JACK COMPANY OF ELK PARK INC | SCAC4 | ||
| 2088 | HJCS | HUNT, J B DEDICATED CONTRACT | SCAC4 | ||
| 2089 | HJCU | HANJIN CONTAINER LINES, LTD. | PWRC | ||
| 2090 | HJCU | HANJIN Container Lines | RSRV | ||
| 2091 | HJCU | HANJIN SHIPPING CO LTD | SCAC4 | ||
| 2092 | HJCZ | HANJIN CONTAINER LINES, LTD. | PWRC | ||
| 2093 | HJCZ | HANJIN Container Lines | RSRV | ||
| 2094 | HJCZ | HANJIN CONTAINER LINES, LTD. | SCAC4 | ||
| 2095 | HJDB | HINES, J D & BILLY TRUCKING INC | SCAC4 | ||
| 2096 | HJDG | HUNTER, JIM D TRUCKING | SCAC4 | ||
| 2097 | HJDH | HEISKELL, J D HOLDINGS LLC | SCAC4 | ||
| 2098 | HJDK | HEINS, JACK D | SCAC4 | ||
| 2099 | HJDN | HARJU, DYLAN | SCAC4 | ||
| 2100 | HJDT | HENNIGAN, JAMES D TRUCKING | SCAC4 |