| 1901 | HGK | Fika Salaama Airlines Ltd. | Callsign: Salaama, | EAU | AVCODES |
| 1902 | HGK | Fika Salaama Airlines | IATA: N8 | | ICAO1 |
| 1903 | HGK | Häfen und Güterverkehr Köln AG | Köln | D | privat-bahn.de |
| 1904 | HGK | Häfen und Güterverkehr Köln AG | | D | TRAFFIC |
| 1905 | HGK | Häfen und Güterverkehr Köln | | DE | VKM |
| 1906 | HGKG | HEGE TRUCKING | | | SCAC4 |
| 1907 | HGKI | HULL, GENE TRUCKING INC | | | SCAC4 |
| 1908 | HGKL | HERITAGE TRUCK LINES INC | | | SCAC4 |
| 1909 | HGKN | HIGHLAND TANK LINES | | | SCAC4 |
| 1910 | HGLA | HINOJOSA GUERRA, LUIS ANTONIO | | | SCAC4 |
| 1911 | HGLB | HG LOGISTICS LLC | | | SCAC4 |
| 1912 | HGLD | HAY GUY LLC, THE | | | SCAC4 |
| 1913 | HGLE | HENSLEY, GLENN LLC | | | SCAC4 |
| 1914 | HGLK | HAUGLAND TRUCKING | | | SCAC4 |
| 1915 | HGLL | HOGAN LOGISTICS LLC | | | SCAC4 |
| 1916 | HGLN | LOAGLAND TRANSFER INC | | | SCAC3 |
| 1917 | HGLN | HIGHLINE MFG INC | | | SCAC4 |
| 1918 | HGLR | HIDALGO GUTIERREZ, LUIS ALBERTO | | | SCAC4 |
| 1919 | HGLS | HUB GROUP LOGISTICS SERVICES | | | SCAC4 |
| 1920 | HGLU | JF HILLEBRAND LIMITED | | IRL | BIC |
| 1921 | HGLU | JF HILLEBRAND LIMITED | | | SCAC4 |
| 1922 | HGLV | HELKA GLOBAL LOGISTICS LTD | | | SCAC4 |
| 1923 | HGM | Prime Air Sdn. Bhd. | Callsign: Mahsuri, | MAL | AVCODES |
| 1924 | HGME | HI GRADE MATERIALS CO | | | SCAC4 |
| 1925 | HGMR | HOGE MOTOR COMPANY | | | SCAC4 |
| 1926 | HGMS | HAGMANS TRUCKING LTD | | | SCAC4 |
| 1927 | HGND | HAGAN, DON & SONS INC | | | SCAC4 |
| 1928 | HGNG | HERMITAGE NGT | | | SCAC4 |
| 1929 | HGNI | HAUGENS INCORPORATED | | | SCAC4 |
| 1930 | HGNL | HIGHLAND EQUIPMENT LIMITED | | | SCAC4 |
| 1931 | HGNR | HIGH LINE TRANSPORTATION INC | | | SCAC4 |
| 1932 | HGNS | HIGGINS TRUCKING SERVICE | | | SCAC4 |
| 1933 | HGNT | HOGAN TRANSPORT | | | SCAC4 |
| 1934 | HGNX | NORTHERN REFRIGERATOR LINE, INC. | | | PWRC |
| 1935 | HGO | One Air Limited | Callsign: Hamption, | GB | AVCODES |
| 1936 | HGOA | HERGO TRANS CORP | | | SCAC4 |
| 1937 | HGOD | HERBST, GORDON | | | SCAC4 |
| 1938 | HGOF | HAGIN & OLLIFF OIL CO INC | | | SCAC4 |
| 1939 | HGOG | HAYES GROUP OF GUILFORD INC | | | SCAC4 |
| 1940 | HGOT | HARMENING OIL & TRUCKING INC | | | SCAC4 |
| 1941 | HGOY | HAGER OIL CO | | | SCAC4 |
| 1942 | HGPC | HOLLAR & GREENE PRODUCE CO. INC | | | SCAC4 |
| 1943 | HGPI | HUBACH GROUP INC, THE | | | SCAC4 |
| 1944 | HGPL | HERITAGE PETROLEUM LLC | | | SCAC4 |
| 1945 | HGPR | HARDING, PETER | | | SCAC4 |
| 1946 | HGPS | HIGH PLAINS LOGISTICS CONSULTING LL | | | SCAC4 |
| 1947 | HGPX | Harrison Gypsum Co. | added 4/1997; 7/2000-7/2005; eliminated 10/2006 | | NAKINA |
| 1948 | HGPX | Harrison Gypsum Co. | added 4/97; 7/2000 | | NRHS |
| 1949 | HGPX | HARRISON GYPSUM COMPANY | | | PWRC |
| 1950 | HGPX | Harrison Gypsum | | | RSRV |
| 1951 | HGR | Hangar 8 Ltd. | Callsign: Hang, | GB | AVCODES |
| 1952 | HGR | Hangar 8 | | | ICAO1 |
| 1953 | HGRD | HOEG, R A & SONS LTD | | | SCAC4 |
| 1954 | HGRG | HILL, G R TRUCKING INC | | | SCAC4 |
| 1955 | HGRI | HONEYVILLE GRAIN INC | | | SCAC4 |
| 1956 | HGRN | HASTINGS TRUCKING CO INC | | | SCAC4 |
| 1957 | HGRO | HOGRO TRANSPORT | | | SCAC4 |
| 1958 | HGRT | HIGH ROLLER TRANSPORTATION LLC | | | SCAC4 |
| 1959 | HGRY | HARRIS, GARY ROBERT | | | SCAC4 |
| 1960 | HGS | Höfels Gleisbau - Service GmbH | | DE | VKM |
| 1961 | HGSA | HOG ISLAND WHOLESALE BAIT | | | SCAC4 |
| 1962 | HGSK | HG SKIS LLC | | | SCAC4 |
| 1963 | HGSL | HALL, G & SONS LTD | | | SCAC4 |
| 1964 | HGSM | HUGHES TRUCKING COMPANY INC | | | SCAC4 |
| 1965 | HGSY | HERITAGE GROUP SAFETY | | | SCAC4 |
| 1966 | HGT | GMJ Air Shuttle, LLC | Callsign: Hightech, | USA | AVCODES |
| 1967 | HGTC | HOGTUNES INC | | | SCAC4 |
| 1968 | HGTD | H K GLOBAL TRADING LTD | | | SCAC4 |
| 1969 | HGTE | HI-TECH EXPRESS INC | | | SCAC4 |
| 1970 | HGTF | HOGAN TRANSFER AND STORAGE CORPORAT | | | SCAC4 |
| 1971 | HGTG | HORA, GEORGE TRUCKING | | | SCAC4 |
| 1972 | HGTK | H & G TRUCKLINES INC | | | SCAC4 |
| 1973 | HGTL | HEER, GARY TRANSPORT LTD | | | SCAC4 |
| 1974 | HGTN | HARRINGTON AND COMPANY INC | | | PWRC |
| 1975 | HGTN | HOGAN TRANSPORTS, INC | | | SCAC1 |
| 1976 | HGTN | Hogan Transport | | | SCAC2 |
| 1977 | HGTN | HOGAN TRANSPORTS INC | | | SCAC4 |
| 1978 | HGTO | HAGERSTOWN TRANSLOAD SERVICES LLC | | | SCAC4 |
| 1979 | HGTP | HUNTINGTON POOL WATER LLC | | | SCAC4 |
| 1980 | HGTR | HIGH GEAR TRANSPORT LTD | | | SCAC4 |
| 1981 | HGTU | HOYER GLOBAL TRANSPORT | | NL | BIC |
| 1982 | HGTU | HOYER GLOBAL TRANSPORT BV | | | SCAC4 |
| 1983 | HGTY | HAGGARD TRUCKING LTD | | | SCAC4 |
| 1984 | HGUI | Hering Bau & GmbH & Co. KG | | DE | VKM |
| 1985 | HGUO | HELGERS-UNITED OIL CO INC | | | SCAC4 |
| 1986 | HGW | Harrogate Gas Works | | GB | TRAFFIC |
| 1987 | HGWD | HERITAGE WEST HOLDINGS LTD | | | SCAC4 |
| 1988 | HGWH | HUB GROUP WHOLESALE | | | SCAC4 |
| 1989 | HGWI | HOG WILD TRUCKING INC | | | SCAC4 |
| 1990 | HGWU | HUB GROUP INC | | | SCAC4 |
| 1991 | HGYM | HINTON, GREGORY M | | | SCAC4 |
| 1992 | HH | Islandsflug HF | ICAO: ICB, Callsign: Icebird, IATA Prefix: 652, Designator HH recalled by IATA. Merged in Air Atlanta Icelandic. IATA designator changed from HT* | IS | AVCODES |
| 1993 | HH | Hispania, S.A. | ICAO: HSL, Ceased operations on 15 July 1989. IATA designator changed from XX | E | AVCODES |
| 1994 | HH | Somali Airlines | ICAO: SOM, Callsign: Somalair, | SO | AVCODES |
| 1995 | HH | Limited Liability Company Qanot Sharq | ICAO: QNT, Callsign: Qanot Sharq, | UZ | AVCODES |
| 1996 | HH | Taban Airlines | ICAO: TBN, Callsign: Taban Air, | IR | AVCODES |
| 1997 | HH | Hjørring - Hørby | 1913 - 1953 | DK | jernbanen.dk |
| 1998 | HH | HIMMELBERGER-HARRISON MANUFACTURING | | | PWRC |
| 1999 | HH | | City: Hamburg | D | TRAFFIC |
| 2000 | HHA | Atlantic Airlines de Honduras, S de R.L. | IATA: ZF, Callsign: Atlantic Honduras, Founded in 1991 by Atlantic Airlines of Nicaragua. Ceased Operations in October 2008. Company dissolved in 2009. | HN | AVCODES |
