| 101 | DAA | Decatur Aviation, Inc. | Callsign: Decur, | USA | AVCODES |
| 102 | DAA | Decatur Aviation | | | ICAO1 |
| 103 | DAAC | DALLAS WOOD TRUCKING | | | SCAC4 |
| 104 | DAAD | DANISHA SCULPTURE | | | SCAC4 |
| 105 | DAAE | DELMAS AMERICA AFRICA EUROPEAN LINE | | | SCAC1 |
| 106 | DAAE | DELMAS AMERICA AFRICA EUROPEAN LINE | | | SCAC4 |
| 107 | DAAG | DANGO EXPRESS INC | | | SCAC4 |
| 108 | DAAG | Deutsche Lastautomobilfabrik AG | | D | TRAFFIC |
| 109 | DAAH | DAUGHERTY, SCOTT TRUCKING | | | SCAC4 |
| 110 | DAAI | DIVERSIFIED AGRICULTURAL AND INDUST | | | SCAC4 |
| 111 | DAAM | D & A AUTO TRANSPORTATION LLC | | | SCAC4 |
| 112 | DAAS | DOUBLE AA TRANSPORTATION | | | SCAC4 |
| 113 | DAAU | DANISH MINISTRY OF DEFENCE ACQUISITION AND LOGISTICS ORGANISATION | | DK | BIC |
| 114 | DAAU | DANISH ARMY MATERIEL COMMAND | | | SCAC4 |
| 115 | DAB | Dassault Aviation | | F | AVCODES |
| 116 | DAB | Dassault Aviation | | | ICAO1 |
| 117 | DAB | Dansk Automobil Byggeri A/S | | DK | TRAFFIC |
| 118 | DABB | DANASONS BORDER SERVICES INC | | | SCAC4 |
| 119 | DABE | DREISBACH FREIGHT SERVICE (DIVISION | | | SCAC4 |
| 120 | DABI | DRIVE TRANSPORT INC | | | SCAC4 |
| 121 | DABL | D A B LOGISTICS INC | | | SCAC4 |
| 122 | DABM | DAMASKOI | | | SCAC4 |
| 123 | DABN | DIABLO TRUCKING INC | | | SCAC4 |
| 124 | DABO | DEANGELO BROTHERS INC | | | SCAC4 |
| 125 | DABR | D A TRANSPORT INC | | | SCAC4 |
| 126 | DABT | DIMAX EXPRESS INC | | | SCAC4 |
| 127 | DABX | Dingfelder & Balish, Inc. (DABX 100-119) (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 128 | DABX | Dingfelder & Balish, Inc. (DABX 6600-6619) | 7/1935 | | NAKINA |
| 129 | DAC | McDonnell Douglas Corp. | Callsign: Daco, Merged into Boeing Aircraft Company. | USA | AVCODES |
| 130 | DAC | Dominion Air Ltd. | Callsign: Dominion Air, | WAN | AVCODES |
| 131 | DAC | McDonnell Douglas | | | ICAO1 |
| 132 | DACA | DACSA TRUCKING LLC | | | SCAC4 |
| 133 | DACB | DOUBLE ACE CARGO INC | | | SCAC4 |
| 134 | DACC | DACCO INCORPORATED | | | SCAC4 |
| 135 | DACD | DAC | | | SCAC4 |
| 136 | DACF | DAYTON CONTAINERIZED FREIGHT INC | | | SCAC4 |
| 137 | DACI | DORMANS AUTO CENTER INC | | | SCAC4 |
| 138 | DACIA | AUTOMOBILE DACIA SA | | RO | VKM |
| 139 | DACK | D & A TRUCKING INC | | | SCAC4 |
| 140 | DACL | DOWNEAST ANTIQUES & COLLECTIBLES IN | | | SCAC4 |
| 141 | DACM | DAVILA GARCIA, DANIEL | | | SCAC4 |
| 142 | DACO | DAV-COR TRANSPORT INC | | | SCAC4 |
| 143 | DACS | DACS INC | | | SCAC4 |
| 144 | DACU | DANCONTAINER A/S | | DK | BIC |
| 145 | DACW | DAC SERVICES | | | SCAC4 |
| 146 | DACX | VIP Tank Car Service | added 1/1998; 7/2000; eliminated 7/2001; 7/2005 (not listed) | | NAKINA |
| 147 | DACX | Darling & Co. | 8/1920-1/1980; eliminated 10/1985 | | NAKINA |
| 148 | DACX | Darling & Co. | 4/38-1/80 | | NRHS |
| 149 | DACX | VIP Tank Car Service | added 1/98; 7/2000; eliminated 7/2001 | | NRHS |
| 150 | DACX | VIP TANK CAR SERVICES [DARLING & COMPANY] | | | PWRC |
| 151 | DACX | Darling and Company (VIP Tank Car Services) | | | RSRV |
| 152 | DACX | VIP TANK CAR | | | SCAC4 |
| 153 | DACY | DACON LOGISTICS LLC | | | SCAC4 |
| 154 | DACZ | DANA CORP. | | | PWRC |
| 155 | DAD | Dorado Air | Callsign: Dorado Air, | DOM | AVCODES |
| 156 | DAD | Air Express (Pvt) Ltd | Callsign: Dewan Express, | PK | AVCODES |
| 157 | DAD | Dorado Air | | | ICAO1 |
| 158 | DADA | DE ANDA TRUCKING | | | SCAC4 |
| 159 | DADC | DELAWARE AVENUE DISTRIBUTION CENTER | | | SCAC4 |
| 160 | DADL | D'AMICO DRY LIMITED | | | SCAC4 |
| 161 | DADN | D AND D OIL | | | SCAC4 |
| 162 | DADP | D AND D EXPRESS | | | SCAC4 |
| 163 | DADU | TANKTRAILER NEDERLAND | | NL | BIC |
| 164 | DADU | TANKTRAILER NEDERLAND | | | SCAC4 |
| 165 | DAE | DHL Aero Expreso, S.A. | IATA: D5, IATA Prefix: 992, Designator D5* recalled by IATA. IATA designator changed from DS* | PA | AVCODES |
| 166 | DAE | DHL Aero Express, S.A. | IATA: XP, IAATA changed to DS | PA | AVCODES |
| 167 | DAE | DHL Aero Expreso, S.A. | IATA: DS, IATA designator changed to D5 | PA | AVCODES |
| 168 | DAE | DHL Aero Expreso | | | ICAO1 |
| 169 | DAEA | DEFENDER AUTO EXPRESS | | | SCAC4 |
| 170 | DAEB | DAE TRANSPORT INC | | | SCAC4 |
| 171 | DAEI | DANIELS, ALFRED INC | | | SCAC4 |
| 172 | DAEM | D&E MAIL CONTRACTORS, INC | | | SCAC1 |
| 173 | DAEN | DALTON ENTERPRISES INC | | | SCAC4 |
| 174 | DAEQ | DOUBLE A ENTERPRISES INC | | | SCAC4 |
| 175 | DAF | Danish Air Force | Callsign: Danish Airforce, | DK | AVCODES |
| 176 | DAF | Dynamic Air | Callsign: Dynamic Air, | USA | AVCODES |
| 177 | DAF | Danish Air Force | | | ICAO1 |
| 178 | DAF | | | | TRAFFIC |
| 179 | DAFA | DE ANDA ALVAREZ, FERNANDO ANTONIO | | | SCAC4 |
| 180 | DAFD | DAY AFTER DAY SERVICE, INC. | | | SCAC1 |
| 181 | DAFG | DAYTON FREIGHT LINES, INC | | | SCAC1 |
| 182 | DAFG | DAYTON FREIGHT LINES INC | | | SCAC4 |
| 183 | DAFI | DAVIDSVILLE FUEL INC | | | SCAC4 |
| 184 | DAFO | DTL AA FREIGHT CO INC | | | SCAC4 |
| 185 | DAFP | DELTA AFRAMAX CORPORATION | | | SCAC4 |
| 186 | DAFT | DAF TRANSPORT | | | SCAC4 |
| 187 | DAFU | DAFRA LINES SA | | | PWRC |
| 188 | DAFU | Dafra Lines | | | RSRV |
| 189 | DAFX | Dept. of Defense, Troop Support and Aviation Material Readiness Command (intra-plant service) | 7/2000-7/2005 (not listed) | | NAKINA |
| 190 | DAFX | Dept. of Defense, MTMC | eliminated 4/1995 | | NAKINA |
| 191 | DAFX | Dept. of Defense | added 4/1994; eliminated 7/1994 | | NAKINA |
| 192 | DAFX | Dept. of Defense, Troop Support and Aviation Material Readiness Command (intra-plant service) | 1/1980-1/1994 | | NAKINA |
| 193 | DAFX | Dept. of Defense, Military Traffic Management Command | 1/1975 | | NAKINA |
| 194 | DAFX | Dept. of Defense, Military Traffic Management and Terminal Service | added 10/1966; 10/1966-4/1970; eliminated 1/1974 | | NAKINA |
| 195 | DAFX | Department of the Army | eliminated 7/1958 | | NAKINA |
| 196 | DAFX | Department of the Army, Office of the Chief of Transportation | 7/1954-10/1957 | | NAKINA |
| 197 | DAFX | Department of the Army, Transportation Supply and Maintenance Command, St. Louis 1, Missouri | added 10/1955 | | NAKINA |
| 198 | DAFX | Department of the Army, Transportation Materiel Command, Marietta, Pennsylvania | eliminated 10/1955 | | NAKINA |
| 199 | DAFX | Department of the Army, Office of the Chief of Transportation, Railway Transport Service Division | added 10/1953 | | NAKINA |
| 200 | DAFX | Department of the Army, Office of the Chief of Transportation, Railway Transport Service Division | added 10/53 | | NRHS |
