| 2101 | HHIO | HOG HAULERS INC | | | SCAC4 |
| 2102 | HHIQ | HUDDLE HOUSE INC | | | SCAC4 |
| 2103 | HHIR | HUBBARD HALL INC | | | SCAC4 |
| 2104 | HHIY | HOLT HAULING INC | | | SCAC4 |
| 2105 | HHJ | Hads-Ning Herreders Jernbane (Odderbanen) | 1884 - 2008 | DK | jernbanen.dk |
| 2106 | HHJ | Hälsingborg - Hässleholm Järnväg | 1875 - 1940 | S | svenska-lok.se |
| 2107 | HHJ | Hads-Ning Herreders Jernbane (Odderbanen) | 1884 - 2008 | DK | TRAFFIC |
| 2108 | HHK | Helicopters Hong Kong Limited | IATA: UO, Callsign: Helihongkong, Name changed to Hong Kong Express Airways Limited | HK | AVCODES |
| 2109 | HHK | Helicopters Hong Kong Limited | IATA: UO, Callsign: Helihongkong, IATA designator changed to UO. Name changed from Helicopters Hong Kong Limited | HK | AVCODES |
| 2110 | HHK | Helicopters Hong Kong Limited | Callsign: Helihongkong, IATA designator changed from UO* | HK | AVCODES |
| 2111 | HHKG | H & H TRUCKING | | | SCAC4 |
| 2112 | HHKI | HATCHER TRUCKING INC | | | SCAC4 |
| 2113 | HHL | Helicopter Hire Ltd. | Callsign: Heli Hire, | GB | AVCODES |
| 2114 | HHLA | HIGHLAND TRANSPORT INC | | | SCAC4 |
| 2115 | HHLG | H & H LOGISTICS LLC | | | SCAC4 |
| 2116 | HHLL | HAYSE HOLDINGS LLC | | | SCAC4 |
| 2117 | HHLN | HASTINGS HOT LINE TOOLS | | | SCAC4 |
| 2118 | HHLO | H & H LOGISTICAL SERVICES INC | | | SCAC4 |
| 2119 | HHLP | HOUGAR HAULING LLC | | | SCAC4 |
| 2120 | HHLU | HULL & HATCH LOGISTICS LLC | | | SCAC4 |
| 2121 | HHLW | HHL | | | SCAC4 |
| 2122 | HHLX | H & H Locomotive Leasing Inc. | 7/2005 (not listed) | | NAKINA |
| 2123 | HHLX | H & H LOCOMOTIVE LEASING, INC. | | | PWRC |
| 2124 | HHLX | H and H Locomotive Leasing | | | RSRV |
| 2125 | HHMO | H & H METALS CO | | | SCAC4 |
| 2126 | HHMU | H.HENRIKSEN AS | | N | BIC |
| 2127 | HHMX | Golden Eagle Petroleum Co. | added 1/1964; eliminated 7/1965 | | NAKINA |
| 2128 | HHMX | Panoma Corp. | 1/1950 (not listed) | | NAKINA |
| 2129 | HHMX | Hagy, Harrington & Marsh | 1/1943-4/1947 | | NAKINA |
| 2130 | HHMX | Golden Eagle Petroleum Co. | eliminated 7/65 | | NRHS |
| 2131 | HHMX | *HAGY, HARRINGTON & MARSH | | | PWRC |
| 2132 | HHMX | *PANOMA CORP. | | | PWRC |
| 2133 | HHMX | *GOLDEN EAGLE PETROLEUM CO. | | | PWRC |
| 2134 | HHN | Hahn Air Lines | IATA: HR, Callsign: Rooster, IATA Prefix: 169, IATA designator changed to HR. Change of name from Hahn Air Businessline | D | AVCODES |
| 2135 | HHN | Hahn Air Gmbh & Co. Kg. | IATA: HR, Callsign: Rooster, IATA Prefix: 169, Change of name to Hahn Air Businessline | D | AVCODES |
| 2136 | HHN | Hahn Air Businessline | IATA: HR, Callsign: Rooster, IATA Prefix: 169, Change of name from Hahn Air Gmbh & Co. Kg. Name changed to Hahn Air Lines | D | AVCODES |
| 2137 | HHN | Hahn Air Lines | IATA: HR, Callsign: Rooster, IATA Prefix: 169, IATA designator changed from HR*. Change of name from Hahn Air Businessline | D | AVCODES |
| 2138 | HHN | Hahn Air | IATA: HR | | ICAO1 |
| 2139 | HHNG | HAHN, GEORGE TRUCKING | | | SCAC4 |
| 2140 | HHNI | HONEY HOUSE NATURALS INC | | | SCAC4 |
| 2141 | HHNS | HORIZON (H & S) FREIGHTWAYS INC | | | SCAC4 |
| 2142 | HHNT | HAHN LOGISTICS L L C | | | SCAC4 |
| 2143 | HHO | Houston Helicopters, Inc. | Callsign: Houston Heli, | USA | AVCODES |
| 2144 | HHO | Houston Helicopters | | | ICAO1 |
| 2145 | HHOG | HEAVY HAULING OF | | | SCAC4 |
| 2146 | HHOI | HURRYIN HOOSIER INC | | | SCAC4 |
| 2147 | HHON | HEAVY HAULERS OF NORTH EAST OHIO LL | | | SCAC4 |
| 2148 | HHOP | H H OPERATIONS INC | | | SCAC4 |
| 2149 | HHOV | Hamburger Omnibus Verein | | D | TRAFFIC |
| 2150 | HHP | Helenia Helicopter Service ApS | Callsign: Helenia, | DK | AVCODES |
| 2151 | HHP | Helenia Helicopter Service | | | ICAO1 |
| 2152 | HHPC | HIGH PRESSURE TRANSPORTS LLC | | | SCAC4 |
| 2153 | HHPE | HI HO PETROLEUM CT COKE INC | | | SCAC4 |
| 2154 | HHPI | Heavy Haul Power International GmbH | Erfurt | D | privat-bahn.de |
| 2155 | HHPI | HOOD, H P INC | | | SCAC4 |
| 2156 | HHPI | Heavy Haul Power International | | D | TRAFFIC |
| 2157 | HHPI | Heavy Haul Power International | | DE | VKM |
| 2158 | HHPO | H & H TRANSPORTATION INC | | | SCAC4 |
| 2159 | HHPP | HATCHER PETROLEUM TRANSPORT INC | | | SCAC4 |
| 2160 | HHPW | HERA SHIPPING & TRADING CO LTD | | | SCAC4 |
| 2161 | HHQT | H & H TRANSPORTATION INC | | | SCAC4 |
| 2162 | HHRI | H & H TRUCKING INC | | | SCAC4 |
| 2163 | HHRL | HUDSON HISTORICS LLC | | | SCAC4 |
| 2164 | HHRR | HIGH RANCH & RODEO CO | | | SCAC4 |
| 2165 | HHRS | Hanson & Hall Rail Services Solutions Ltd. | | GB | TRAFFIC |
| 2166 | HHRU | HIMOINSA | | E | BIC |
| 2167 | HHRV | HORST, HARVEY TRUCKING | | | SCAC4 |
| 2168 | HHRX | H.H. Robertson Co. | 8/1920 | | NAKINA |
| 2169 | HHRX | H.H. ROBERTSON CO. | | | PWRC |
| 2170 | HHS | Hi-Jet Helicopter Services N.V. | Callsign: Hijet, | SME | AVCODES |
| 2171 | HHS | Hi-Jet Helicopter Services | | | ICAO1 |
| 2172 | HHSE | HIGHHOUSE OIL COMPANY INC | | | SCAC4 |
| 2173 | HHSF | HELENS HOMESTYLE FOODS LTD | | | SCAC4 |
| 2174 | HHSG | HOLY HOUSE SHIPPING AB | | | SCAC4 |
| 2175 | HHSH | HARVIES HOTSHOT SERVICE & T | | | SCAC4 |
| 2176 | HHSL | HIGH ST LOGISTICS INC | | | SCAC4 |
| 2177 | HHSO | HARBOR HOUSE SEAFOOD INC | | | SCAC4 |
| 2178 | HHSP | H & H SPECIALTY VEHICLE TRANSPORTAT | | | SCAC4 |
| 2179 | HHTA | HAYES & HAYES TRANSPORTATION | | | SCAC4 |
| 2180 | HHTB | H & H TRUCKING INC | | | SCAC4 |
| 2181 | HHTF | HY-ON-A HILL TROUT FARM | | | SCAC4 |
| 2182 | HHTG | HI HAT TRUCKING | | | SCAC4 |
| 2183 | HHTI | H & H TRANSPORT INC | | | SCAC4 |
| 2184 | HHTJ | H & H TRUCKING INC | | | SCAC4 |
| 2185 | HHTL | H & H TRANSPORTATION LLC | | | SCAC4 |
| 2186 | HHTM | H & H TRUCKING | | | SCAC4 |
| 2187 | HHTN | HOKE, HERBERT TRANSPORTATION INC | | | SCAC4 |
| 2188 | HHTP | HEAVY HAUL TRANSPORT | | | SCAC4 |
| 2189 | HHTQ | HEAVY HAULERS TRUCKING CORP | | | SCAC4 |
| 2190 | HHTR | H&H TRANSPORT, INC. | | | SCAC1 |
| 2191 | HHTT | HICKORY HILL TRANSPORT CO INC | | | SCAC4 |
| 2192 | HHTU | HEINRICH HAMM | | | SCAC4 |
| 2193 | HHTV | H H TRANSPORTATION SERVICES LLC | | | SCAC4 |
| 2194 | HHTY | HERSH , HENRY TRUCKING INC | | | SCAC4 |
| 2195 | HHUC | H & H FREIGHT INC | | | SCAC4 |
| 2196 | HHVE | HOUSER, HARVEY V ENTERPRISES INC | | | SCAC4 |
| 2197 | HHVL | HARRIS HARVESTING LLC | | | SCAC4 |
| 2198 | HHWF | HERITAGE HARDWOOD FLOORS | | | SCAC4 |
| 2199 | HHWI | HARDY, W HENRY INC | | | SCAC4 |
| 2200 | HHWY | HUB HIGHWAY SERVICES | | | SCAC4 |
