| 2101 | KHB | Dalavia | IATA: H8 | | ICAO1 |
| 2102 | KHB | Kagerup - Helsinge Banen (Helsingebanen) | 1897 - 1945 | DK | jernbanen.dk |
| 2103 | KHB | Dalavia — Far Eastern Airways | | RUS | TRAFFIC |
| 2104 | KHC | Kitty Hawk Airways | Callsign: Cargo Hawk, | USA | AVCODES |
| 2105 | KHC | Kitty Hawk Airways | | | ICAO1 |
| 2106 | KHCU | GUANGDONG KEHENG JILI IOT EQUIPMENT CO., LTD. | | PRC | BIC |
| 2107 | KHCX | Chief Petty Paper | added 10/1988; eliminated 1/1991 | | NAKINA |
| 2108 | KHCX | Chief Petty Paper | added 10/88; eliminated 1/91 | | NRHS |
| 2109 | KHCX | CHIEF PETTY PAPER | | | PWRC |
| 2110 | KHCZ | KOCH CARBON | | | PWRC |
| 2111 | KHDA | K & H DISPATCH COURIERS LTD | | | SCAC4 |
| 2112 | KHDS | KP HOME DELIVERY SERVICES | | | SCAC4 |
| 2113 | KHDT | KIRBY, H DOUGLAS TRUCKING | | | SCAC3 |
| 2114 | KHE | Kanfey-Ha'emek Aviation d/b/a Emek Wings | IATA: RF, Callsign: Kanfey Haemek, Name changed to Israir in September 1996. | IL | AVCODES |
| 2115 | KHEA | KITTY HAWK EXPRESS AIR TRUCKWAYS IN | | | SCAC4 |
| 2116 | KHEB | K H EXPEDITE LLC | | | SCAC4 |
| 2117 | KHEH | KHEHRA TRUCKING INC | | | SCAC4 |
| 2118 | KHEL | KHELA BROS TRANSPORT LTD | | | SCAC4 |
| 2119 | KHEP | KEHE ENTERPRISES INC | | | SCAC3 |
| 2120 | KHEP | KEHE ENTERPRISES | | | SCAC4 |
| 2121 | KHET | KINGS HOTSHOT EXPRESS | | | SCAC4 |
| 2122 | KHF | Regional State Unitary Enterprise Khabarovsk Airlines | Callsign: Khabarovsk, | RUS | AVCODES |
| 2123 | KHFA | K & H FARMS LLC | | | SCAC4 |
| 2124 | KHFI | KITCHEN FARMS INC | | | SCAC4 |
| 2125 | KHFM | KENT HILL FARMS | | | SCAC4 |
| 2126 | KHGI | KISH-GON-DUG CANADA INC | | | SCAC4 |
| 2127 | KHGT | KENRICH HANDLING & TRUCKING COMPANY | | | SCAC3 |
| 2128 | KHGU | KERNTECHNISCHE HILFSDIENST GMBH | | | SCAC3 |
| 2129 | KHGU | KERNTECHNISCHE HILFSDIENST GMBH | | | SCAC4 |
| 2130 | KHH | Cook Islands Airways Ltd. | IATA: KH, Callsign: Kilo Hotel, | COK | AVCODES |
| 2131 | KHH | Alexandria Airlines | IATA: DQ, | ET | AVCODES |
| 2132 | KHH | Alexandria Airlines | | | ICAO1 |
| 2133 | KHHL | KORN HARVESTING & HAULING LLC | | | SCAC4 |
| 2134 | KHIJ | KEETER HARLEY I JR | | | SCAC3 |
| 2135 | KHJ | Köping - Hults Järnväg | 1856 - 1897 | S | svenska-lok.se |
| 2136 | KHJM | KOCH, JO ANN M | | | SCAC4 |
| 2137 | KHJU | MAERSK A/S | | DK | BIC |
| 2138 | KHJU | HAMBURG SUED | | | SCAC4 |
| 2139 | KHJV | KOCH, JOHN VERNON | | | SCAC3 |
| 2140 | KHK | Public JSC Kharkiv Airlines | IATA: KT, Callsign: Sunray, IATA dsignator changed to KW | UA | AVCODES |
| 2141 | KHK | Public JSC Kharkiv Airlines | IATA: KW, Callsign: Sunray, Ceased operation in March 2015. Designator KW recalled by IATA. IATA dsignator changed from KT | UA | AVCODES |
| 2142 | KHKB | KOHAN KOBAYASHI CANADA INC | | | SCAC4 |
| 2143 | KHKD | HAERKULES KHDK s.r.o. | | CZ | VKM |
| 2144 | KHKG | KOCH TRUCKING | | | SCAC4 |
| 2145 | KHKI | KOCH TRUCKING INC | | | SCAC4 |
| 2146 | KHKV | OZ-Klub historických koľajových vozidiel pri RD Haniska pri Košiciach | | SK | VKM |
| 2147 | KHL | KENTRON HAWAII LTD. | | | PWRC |
| 2148 | KHLC | KITSONS HAULING LLC | | | SCAC4 |
| 2149 | KHLD | KROCUS HOLDINGS LTD | | | SCAC4 |
| 2150 | KHLI | KOHEL INTERSTATE TRANSPORT CORP | | | SCAC4 |
| 2151 | KHLN | KITTY HAWK LOGISTICS INC | | | SCAC4 |
| 2152 | KHLQ | KOHALA EXPRESS | | | SCAC3 |
| 2153 | KHLU | MAERSK A/S | | DK | BIC |
| 2154 | KHLU | HAMBURG SUED | | | SCAC4 |
| 2155 | KHM | Cambodia Airlines Co. Ltd. | IATA: Y6, Callsign: Cambodia Airlines, IATA designator changed to DI. Designator Y6* reinstated by IATA | K | AVCODES |
| 2156 | KHM | Cambodia Airlines Co. Ltd. | IATA: DI, Callsign: Cambodia Airlines, IATA designator changed from Y6*. Designator Y6* reinstated by IATA | K | AVCODES |
| 2157 | KHM | Cambodia Airlines | | | ICAO1 |
| 2158 | KHMC | KELLY, H M, INC | | | SCAC3 |
| 2159 | KHMC | KELLY, H M, INC | | | SCAC4 |
| 2160 | KHMO | KEHM OIL COMPANY | | | SCAC4 |
| 2161 | KHMQ | KOHLS MOTOR TRANSFER COMPANY | | | SCAC3 |
| 2162 | KHMS | KAHN MOTOR SERVICE | | | SCAC3 |
| 2163 | KHMS | KHM SPEEDY TRANSPORT INC | | | SCAC4 |
| 2164 | KHN | Kazakhstan Airlines | Callsign: Nesli, | KZ | AVCODES |
| 2165 | KHN | Khaan Airlines Co., Ltd. | | MGL | AVCODES |
| 2166 | KHNA | KHANIA SHIPPING INC ATHENS GREECE | | | SCAC3 |
| 2167 | KHNK | KAHN TRUCKING | | | SCAC4 |
| 2168 | KHNN | KUEHN AND NAGEL | | | SCAC3 |
| 2169 | KHNN | KUEHNE & NAGEL INC | | | SCAC4 |
| 2170 | KHNS | KUHNS, BILL TRUCKING | | | SCAC3 |
| 2171 | KHNT | KUHN TRANSPORTATION COMPANY, INC | | | SCAC3 |
| 2172 | KHO | Khors Aircompany Ltd. | IATA: X9, Callsign: Aircompany Khors, IATA Prefix: 852, | UA | AVCODES |
| 2173 | KHO | Aircompany "KHORS" Ltd. | IATA: KO, Ceased operation. | UA | AVCODES |
| 2174 | KHO | Khors Aircompany | | | ICAO1 |
| 2175 | KHOE | KNOTHOLE ENTERPRISES INCORPORATED | | | SCAC3 |
| 2176 | KHP | Khozestan Photros Air Lines | Callsign: Photros Air, | IR | AVCODES |
| 2177 | KHP | Khoezestan Photros Air Lines | | | ICAO1 |
| 2178 | KHPC | KUHN, PAUL COMPANY INC | | | SCAC3 |
| 2179 | KHR | Khazar | Callsign: Khazair, | TM | AVCODES |
| 2180 | KHR | Khazar | | | ICAO1 |
| 2181 | KHRC | KOCH, RICK OIL COMPANY | | | SCAC4 |
| 2182 | KHRX | Kamloops Heritage Ry. Society | added 10/2003; eliminated 4/2004; 7/2005 (not listed) | | NAKINA |
| 2183 | KHRX | KAMLOOPS HERITAGE RWY. SOCIETY | | | PWRC |
| 2184 | KHRX | KAMLOOPS HERITAGE RAILWAY SOCIETY | | | SCAC4 |
| 2185 | KHSA | KHS AIR FREIGHT INC | | | SCAC3 |
| 2186 | KHSC | KITTLE HAULING & SUPPLY COMPANY INC | | | SCAC3 |
| 2187 | KHSC | KITTLE HAULING & SUPPLY COMPANY INC | | | SCAC4 |
| 2188 | KHSH | KHASHRO TRANSPORTATION | | | SCAC4 |
| 2189 | KHSI | KOCH SERVICE INC | | | SCAC3 |
| 2190 | KHSI | KELLYS HOT SHOT & TRUCKING SERVICE | | | SCAC4 |
| 2191 | KHSM | KHST TRANSPORTATION | | | SCAC4 |
| 2192 | KHSN | KILMER, HERB & SONS INC | | | SCAC3 |
| 2193 | KHSN | KOHSAR INTERNATIONAL INC | | | SCAC4 |
| 2194 | KHSP | KEIN HUNG SHIPPING CO. LTD. | | | SCAC3 |
| 2195 | KHSP | KIEN HUNG SHIPPING CO LTD | | | SCAC4 |
| 2196 | KHSV | KERN HOTSHOT SERVICE | | | SCAC4 |
| 2197 | KHT | Khatlon Air | Callsign: Khatlon, | TJ | AVCODES |
| 2198 | KHT | Klub historickej techniky pri Rušňovom depe Zvolen | | SK | VKM |
| 2199 | KHTC | KNIBIEHLY TRUCKING INC | | | SCAC4 |
| 2200 | KHTF | KNIGHTS TRANSFER | | | SCAC3 |
