| 2201 | DHRU | DEN HARTOGH INTERNATIONAL | | | PWRC |
| 2202 | DHRU | Den Hartogh NV | | | RSRV |
| 2203 | DHRU | DEN HARTOGH INTERNATIONALE TANKTRAN | | | SCAC4 |
| 2204 | DHSE | DELTA HARMONY SPECIAL MARITIME ENTE | | | SCAC4 |
| 2205 | DHSF | Deutsche Hochseeflotte (-1918) | | D | TRAFFIC |
| 2206 | DHSG | DHASH TRUCKING | | | SCAC4 |
| 2207 | DHSI | DHI LOGISTICS INC | | | SCAC4 |
| 2208 | DHSM | DELTA HELLAS SPECIAL MARITIME ENTER | | | SCAC4 |
| 2209 | DHSP | DHILLON & SON TRANSPORT INC | | | SCAC4 |
| 2210 | DHSQ | DELUE HAULERS SPECIALIZED CARRIERS | | | SCAC4 |
| 2211 | DHTB | DHT BROKERAGE | | | SCAC4 |
| 2212 | DHTF | D & H TRANSPORT | | | SCAC4 |
| 2213 | DHTG | DAHL TUG & BARGE INC | | | SCAC4 |
| 2214 | DHTH | DOUBLE H TRUCKING LLC | | | SCAC4 |
| 2215 | DHTI | DHT CHARTERING INC | | | SCAC4 |
| 2216 | DHTJ | DOUBLE H TRUCKING LLC | | | SCAC4 |
| 2217 | DHTL | D H T LOGISTICS | | | SCAC4 |
| 2218 | DHTP | D. H. T. OF PENNSYLVANIA, INC | | | SCAC1 |
| 2219 | DHTP | D H T OF PENNSYLVANIA INC | | | SCAC4 |
| 2220 | DHTQ | D & H TRANSPORTATION LLC | | | SCAC4 |
| 2221 | DHTR | DEERHAVEN TRANSPORT INC | | | SCAC4 |
| 2222 | DHTS | DASH TRANSPORT INC | | | SCAC4 |
| 2223 | DHTT | DASH TRANSPORTATION | | | SCAC4 |
| 2224 | DHTW | DOUBLE H TOWING | | | SCAC4 |
| 2225 | DHTY | D&H TRANSPORT | | | SCAC1 |
| 2226 | DHTY | D & H TRANSPORT | | | SCAC4 |
| 2227 | DHUT | DEHUT TRUCKING INCORPORATED | | | SCAC4 |
| 2228 | DHV | DHL Aviation (Pty) Ltd. | Callsign: Worldstar, | ZA | AVCODES |
| 2229 | DHV | DHL Aviation | | | ICAO1 |
| 2230 | DHVC | DEHAVEN TRANSPORTATION CO INC | | | SCAC4 |
| 2231 | DHWP | DHARIWAL TRANSPORT | | | SCAC4 |
| 2232 | DHX | DHL International E.C. | IATA: ES, Callsign: Dilmun, IATA Prefix: 155, Name changed to DHL Aviation EEMEA B.S.C(c) | BRN | AVCODES |
| 2233 | DHX | DHL Aviation EEMEA B.S.C(c) | IATA: ES, Callsign: Dilmun, IATA Prefix: 155, Name changed from DHL Aviation E.C. | BRN | AVCODES |
| 2234 | DHX | DHL International | IATA: ES | | ICAO1 |
| 2235 | DHXG | DEHAVENS TRANSFER & STORAGE OF GREE | | | SCAC4 |
| 2236 | DHXI | DEPENDABLE HAWAIIAN EXPRESS | | | SCAC1 |
| 2237 | DHXI | DEPENDABLE HAWAIIAN EXPRESS | | | SCAC4 |
| 2238 | DHXR | DH EXPRESS INC | | | SCAC4 |
| 2239 | DHZA | DELHAIZE AMERICA LLC | | | SCAC4 |
| 2240 | DHZU | DHL GLOBAL FORWARDING (ITALY) S.P.A | | I | BIC |
| 2241 | DHZU | DHL EXPRESS (ITALY) SRL | | | SCAC4 |
| 2242 | DI | Deutsche BA Luftfahrtgeselischaft mbH | ICAO: BAG, Callsign: Speedway, IATA Prefix: 944, Name changed to Dba Lufttahrtgesellschaft mbH | D | AVCODES |
| 2243 | DI | Delta Air Regionalflugverkhr GmbH | ICAO: DEL, Callsign: Bodensse, Merge into form Deutsche BA | D | AVCODES |
| 2244 | DI | Donaldson International Airways | Callsign: Donaldson, | GB | AVCODES |
| 2245 | DI | Dba Lufttahrtgesellschaft mbH | ICAO: BAG, Callsign: Speedway, IATA Prefix: 944, Merged into Air Berlin. Name changed from Deutsche BA Luftfahrtgeselischaft mbH | D | AVCODES |
| 2246 | DI | Cambodia Airlines Co. Ltd. | ICAO: KHM, Callsign: Cambodia Airlines, IATA designator changed from Y6*. Designator Y6* reinstated by IATA | K | AVCODES |
| 2247 | DI | Norwegian Air UK Ltd. | ICAO: NRS, Callsign: Norworld, ICAO Callsign changed to Rednose. | GB | AVCODES |
| 2248 | DI | Norwegian Air UK Ltd. | ICAO: NRS, Callsign: Rednose, Ceased operations on 01 November 2021. ICAO Callsign changed from Norworld. | GB | AVCODES |
| 2249 | DI | DAKOTA & IOWA RAILROAD | | | PWRC |
| 2250 | DI | D.I. Diversified Investments SA | | CH | VKM |
| 2251 | DIA | Direct Air, Inc. | Callsign: Blue sky, Designator HB recalled by IATA | USA | AVCODES |
| 2252 | DIA | Direct Air, Inc. | IATA: HB, Callsign: Blue sky, Designator HB recalled by IATA | USA | AVCODES |
| 2253 | DIA | Direct Air | | | ICAO1 |
| 2254 | DIAA | DIAMOND STATE TRUCKING INC | | | SCAC4 |
| 2255 | DIAB | DIABLO TRANSPORTATION, INC | | | SCAC1 |
| 2256 | DIAB | DI APPOLO TRUCKING LLC | | | SCAC4 |
| 2257 | DIAC | DIACON TECHNOLOGIES INC | | | SCAC4 |
| 2258 | DIAL | DIAZ, LUIS | | | SCAC4 |
| 2259 | DIAM | DIAMOND MATERIALS LLC | | | SCAC4 |
| 2260 | DIAMO | DIAMO, státní podnik | | CZ | VKM |
| 2261 | DIAN | DIANA TRUCK LINES, INC | | | SCAC1 |
| 2262 | DIAN | DIANA TRUCKING CORP | | | SCAC4 |
| 2263 | DIAQ | DIXIE ONE TRUCKING LLC | | | SCAC4 |
| 2264 | DIAR | DOMESTIC INTERMODAL AMERICA INC | | | SCAC4 |
| 2265 | DIAT | DIAMOND TRANSPORTATION SYSTEM, INC | | | SCAC4 |
| 2266 | DIAW | DIABLO TRUCKING LLC | | | SCAC4 |
| 2267 | DIB | DILLONS BUS SERVICE INC | | | SCAC4 |
| 2268 | DIBB | DISTINCTIVE CUSTOM CABINETS CORPORA | | | SCAC4 |
| 2269 | DIBE | DIETERS METAL FABRICATING LTD | | | SCAC4 |
| 2270 | DIBL | DIBLE, JIM OIL COMPANY INC | | | SCAC4 |
| 2271 | DIBQ | DIXON NETWORKS CORPORATION | | | SCAC4 |
| 2272 | DIBS | DIAKON LOGISTICS | | | SCAC4 |
| 2273 | DIBT | DISTRIBUTORS TRANSPORT INC | | | SCAC4 |
| 2274 | DIBU | DESERT ISLE INC. | | USA | BIC |
| 2275 | DIBU | HEDE NIELSEN A/S | | | SCAC4 |
| 2276 | DIBV | DICKSON BULK SERVICES INC | | | SCAC4 |
| 2277 | DIC | Aeromedica, S.A. de C.V. | Callsign: Aeromedica, | MEX | AVCODES |
| 2278 | DIC | Aeromedica | | | ICAO1 |
| 2279 | DICA | DALPRO INDUSTRIAL CLEANING OF AMERI | | | SCAC4 |
| 2280 | DICC | DILLON, C C COMPANY | | | SCAC4 |
| 2281 | DICE | DICECO LIMITED ENTERPRISES, INC | | | SCAC1 |
| 2282 | DICE | DIAMOND LOGISTICS INC | | | SCAC4 |
| 2283 | DICI | DIAMOND COURIER INC | | | SCAC4 |
| 2284 | DICL | DIRECT CONTAINER LINES (NVOCC) | | | SCAC1 |
| 2285 | DICL | DIRECT CONTAINER LINE INC | | | SCAC4 |
| 2286 | DICN | DI CENSO TRANSPORT INC | | | SCAC4 |
| 2287 | DICO | DICOSTANZO, G INC | | | SCAC4 |
| 2288 | DICR | DI-COR ENGINEERING | | | SCAC4 |
| 2289 | DICS | DISCOUNT COURIER SERVICES | | | SCAC4 |
| 2290 | DICT | D T L TRANSPORTATION INC | | | SCAC4 |
| 2291 | DICV | DIENER INC | | | SCAC4 |
| 2292 | DICX | Merchants Despatch Transportation Corp. | 1/1975-1/1980; eliminated 1/1980 | | NAKINA |
| 2293 | DICX | Airco Industrial Gases, a Division of Airco, Inc. | added 1/1972; eliminated 4/1973 | | NAKINA |
| 2294 | DICX | Airco Industrial Gases, Division Air Reduction Co., Inc. | eliminated 1/1972 | | NAKINA |
| 2295 | DICX | Merchants Despatch Transportation Corp. | 4/1970 | | NAKINA |
| 2296 | DICX | ""Dry Ice"" Refrigerator Line, Pure Carbonic Co., a Division of Air Reduction Co., Inc. (Merchants Despatch Transportation Corp.) | 10/1966 | | NAKINA |
| 2297 | DICX | Merchants Despatch Transportation Corp. | 1/1946-7/1965 | | NAKINA |
| 2298 | DICX | Pure Carbonic, Inc. | 1/1941-1/1945 | | NAKINA |
| 2299 | DICX | Pure Carbonic, Inc., Refrigerator Line | 4/1938 | | NAKINA |
| 2300 | DICX | Dry Ice Corp. of America (Dry Ice Inc., Refrigerator Line) | 7/1937 | | NAKINA |
