| 1 | HH | Hjørring - Hørby | 1913 - 1953 | DK | jernbanen.dk |
| 2 | HH | HIMMELBERGER-HARRISON MANUFACTURING | PWRC | ||
| 3 | HH | City: Hamburg | D | TRAFFIC | |
| 4 | HHA | Atlantic Airlines de Honduras | ICAO1 | ||
| 5 | HHA | City: Hamburg | D | TRAFFIC | |
| 6 | HHAG | HURST HAULING | SCAC4 | ||
| 7 | HHAH | H & H TRANSPORTATION INC | SCAC4 | ||
| 8 | HHAL | HANSEN HAULING | SCAC4 | ||
| 9 | HHAN | HORSCH ANDERSON | SCAC4 | ||
| 10 | HHAR | HARVEY, HAROLD | SCAC4 | ||
| 11 | HHAT | HATCHETT TRANSPORTATION INC | SCAC4 | ||
| 12 | HHAU | HENRI HARSCH HH SA | SCAC4 | ||
| 13 | HHAY | HUBKA HAY FARMS | SCAC4 | ||
| 14 | HHB | Helsingør - Hornbæk Banen (Hornbækbanen) | 1906 - 1916 | DK | jernbanen.dk |
| 15 | HHB | Hamburger Hafenbahn AG | Hamburg | D | privat-bahn.de |
| 16 | HHB | Helsingør - Hornbæk Banen (Hornbækbanen) | 1906 - 1916 | DK | TRAFFIC |
| 17 | HHB | Hamburger Hafenbahn | DE | VKM | |
| 18 | HHBAU | W.Hundhausen Bauunternehmen GmbH | DE | VKM | |
| 19 | HHBC | HBC HAMBURG BULK CARRIERS GMBH & CO | SCAC4 | ||
| 20 | HHBF | HHBULKERS FIVE LTD | SCAC4 | ||
| 21 | HHBK | H & H BROKERAGE | SCAC4 | ||
| 22 | HHBL | HENDRIK HUDSON BUS LINES INC | SCAC4 | ||
| 23 | HHBT | HUTTERVILLE HUTTERIAN BRETHREN | SCAC4 | ||
| 24 | HHCC | HYDRO TECH INC | SCAC4 | ||
| 25 | HHCE | H & H COOL EXPRESS LLC | SCAC4 | ||
| 26 | HHCG | HUNGERFORD HEATING/ COOLING | SCAC4 | ||
| 27 | HHCH | HH HAULING | SCAC4 | ||
| 28 | HHCL | HEADHAUL.COM LLC | SCAC4 | ||
| 29 | HHCO | HEINZ, H J COMPANY OF CANADA LTD | SCAC4 | ||
| 30 | HHCR | HIS & HERS COACHWAYS INC | SCAC4 | ||
| 31 | HHCS | HIGH HILLS COURIER SERVICE LIMITED | SCAC4 | ||
| 32 | HHCV | H & H CONTAINER SERVICES LLC | SCAC4 | ||
| 33 | HHCX | Flint Hills Resources LP | added 1/2009 | NAKINA | |
| 34 | HHCX | Huntsman LLC | added 7/2003; 7/2005; eliminated 1/2009 | NAKINA | |
| 35 | HHCX | Champlin Petroleum Co. | added 7/1965; 7/1965-4/1970; eliminated 4/1972 | NAKINA | |
| 36 | HHCX | Champlin Oil & Refining Co. | added 4/1957; 10/1957-4/1961; eliminated 7/1965 | NAKINA | |
| 37 | HHCX | Champlin Refining Co. | 7/1935-7/1954; eliminated 4/1957 | NAKINA | |
| 38 | HHCX | H.H.C. Equipment Co. | 7/1932 | NAKINA | |
| 39 | HHCX | Champlin Tank Car Co. | 7/1930 | NAKINA | |
| 40 | HHCX | Champlin Refining Co. | 8/1920-7/1923 | NAKINA | |
| 41 | HHCX | Champlin Refining Co. | 4/38-1/52; eliminated 4/57 | NRHS | |
| 42 | HHCX | Champlin Oil & Refining Co. | added 4/57; 10/57-4/61; eliminated 7/65 | NRHS | |
| 43 | HHCX | Champlin Petroleum Co. | added 7/65; 7/65-4/70; eliminated 4/72 | NRHS | |
| 44 | HHCX | *CHAMPLIN REFINING CO. [H.H.C. EQUIPMENT CO.] | PWRC | ||
| 45 | HHCX | +HUNTSMAN LLC | PWRC | ||
| 46 | HHCX | Huntsman | RSRV | ||
| 47 | HHCX | CHAMPLIN PETROLEUM CO | SCAC3 | ||
| 48 | HHCX | HUNTSMAN LLC | SCAC4 | ||
| 49 | HHDC | HAWG HAULING & DISPOSAL LLC | SCAC4 | ||
| 50 | HHDK | Hjørring - Hørby | Real: HH, 1913 - 1953 | DK | TRAFFIC |
| 51 | HHDR | HIGH DESERT TRANSPORT | SCAC4 | ||
| 52 | HHE | Heli-Holland | ICAO1 | ||
| 53 | HHE | Freunde der Halle-Hettstedter Eisenbahn e.V. | DE | VKM | |
| 54 | HHEART | Hokkaido Heart Bus | J | TRAFFIC | |
| 55 | HHEB | HILL HOPPER EXPRESS INC | SCAC4 | ||
| 56 | HHEI | HAWK HOLLOW EXPRESS INC | SCAC4 | ||
| 57 | HHEP | H & H EXPRESS LLC | SCAC4 | ||
| 58 | HHER | HIRSCHE HEREFORDS | SCAC4 | ||
| 59 | HHES | HILL, HOLLY EXPRESS LOGISTICS INC | SCAC4 | ||
| 60 | HHEX | H & H Engineering Construction, Inc. | 7/2000-7/2005 (not listed) | NAKINA | |
| 61 | HHEX | H & H Engineering Construction, Inc. | Jul-00 | NRHS | |
| 62 | HHEX | H & H ENGINEERING CONSTRUCTION, INC. | PWRC | ||
| 63 | HHEX | H and H Engineering Construction | RSRV | ||
| 64 | HHFD | H & H FISHERIES LTD | SCAC4 | ||
| 65 | HHFE | HUTCH FUEL OIL | SCAC4 | ||
| 66 | HHFL | H & H FREIGHT LINES INC | SCAC4 | ||
| 67 | HHFT | H & H FARMS | SCAC4 | ||
| 68 | HHGB | Helsingør - Hornbæk - Gilleleje Banen (Hornbækbanen) | 1916 - 2001 | DK | jernbanen.dk |
| 69 | HHGB | Helsingør - Hornbæk - Gilleleje Banen (Hornbækbanen) | 1916 - 2001 | DK | TRAFFIC |
| 70 | HHGE | HOEPFNER, HANS GUENTHER | SCAC4 | ||
| 71 | HHGI | HH & G INC | SCAC4 | ||
| 72 | HHH | Helicsa | ICAO1 | ||
| 73 | HHHA | H & H HAULERS | SCAC4 | ||
| 74 | HHHF | HALPINS FUEL SERVICE INC | SCAC4 | ||
| 75 | HHHL | HAWKINS HEAVY HAULING SERVICE LLC | SCAC4 | ||
| 76 | HHHQ | HAWK HIGH HAULAGE INC | SCAC4 | ||
| 77 | HHHR | HERITAGE HEAVY HAUL INC | SCAC4 | ||
| 78 | HHHT | HENDERSON HEAVY HAUL TRUCKING INC | SCAC4 | ||
| 79 | HHHU | KTG-KRAFTWAGEN-TRANSPORT GESMBH | SCAC3 | ||
| 80 | HHHX | Xcel Energy | added 1/2006 | NAKINA | |
| 81 | HHHX | Public Service Co. of Colorado | added 10/2000; eliminated 10/2002; 7/2005 (not listed) | NAKINA | |
| 82 | HHHX | Public Service Co. of Colorado | added 10/2000 | NRHS | |
| 83 | HHHX | XCEL ENERGY [PUBLIC SERVICE CO. OF COLORADO] | PWRC | ||
| 84 | HHHX | Public Service of Colorado | RSRV | ||
| 85 | HHHX | XCEL ENERGY | SCAC4 | ||
| 86 | HHHY | HEARTLAND HEAVY HAUL INC | SCAC4 | ||
| 87 | HHI | Hamburg International | IATA: 4R | ICAO1 | |
| 88 | HHIB | HUGHES HEAVY INC | SCAC4 | ||
| 89 | HHIC | HAWKES HAULING INC | SCAC4 | ||
| 90 | HHID | HATHAWAY HAULING INC | SCAC4 | ||
| 91 | HHIE | HOLLAND HIGHLIFT INC | SCAC4 | ||
| 92 | HHIG | HEAVY HAULERS INC | SCAC4 | ||
| 93 | HHIH | HIGHWAY HAULERS INC | SCAC4 | ||
| 94 | HHIK | HICKORY HILL | SCAC4 | ||
| 95 | HHIM | H & H IRON AND METAL INC | SCAC4 | ||
| 96 | HHIN | HENRY & HENRY INC | SCAC4 | ||
| 97 | HHIO | HOG HAULERS INC | SCAC4 | ||
| 98 | HHIQ | HUDDLE HOUSE INC | SCAC4 | ||
| 99 | HHIR | HUBBARD HALL INC | SCAC4 | ||
| 100 | HHIY | HOLT HAULING INC | SCAC4 |