| 1 | DA | Air Georgia | ICAO: GEO, Callsign: Air Georgia, ICAO designator changed from DAN | GE | AVCODES |
| 2 | DA | Dan-Air Services Ltd. | ICAO: DAN, Callsign: Danair, Merged into British Airways European Operations Gatwick B.A.E.O.G. | GB | AVCODES |
| 3 | DA | Air Georgia | ICAO: DAN, Callsign: Air Georgia, Merged into Aircompany Airzena Georgian Airlines. Designator DA recalled by IATA | GE | AVCODES |
| 4 | DA | Canadian Pacific Ry. Co. | added 1/1997; 7/2000-7/2005 | | NAKINA |
| 5 | DA | CP Rail System | eliminated 1/1997 | | NAKINA |
| 6 | DA | CP Rail | 1/1994 | | NAKINA |
| 7 | DA | CP Rail (Dominion Atlantic Ry. Co.) | 1/1975-1/1980 | | NAKINA |
| 8 | DA | Dominion Atlantic Ry. Co. | 8/1920-10/1966 | | NAKINA |
| 9 | DA | Dominion Atlantic Ry. Co. | 7/23-10/66 | | NRHS |
| 10 | DA | CP Rail (Dominion Atlantic Ry. Co.) | 1/75-1/80 | | NRHS |
| 11 | DA | CP Rail | Jan-94 | | NRHS |
| 12 | DA | CP Rail System | eliminated 1/97 | | NRHS |
| 13 | DA | Canadian Pacific Ry. Co. | added 1/97; 7/2000 | | NRHS |
| 14 | DA | CP RAIL [DOMINION ATLANTIC RY.] | | | PWRC |
| 15 | DA | Dominion Atlantic Railway (Canadian Pacific Railway) | | | RSRV |
| 16 | DA | Dominion Atlantic Ry. Co. | | CDN | TRAFFIC |
| 17 | DAA | Decatur Aviation, Inc. | Callsign: Decur, | USA | AVCODES |
| 18 | DAA | Decatur Aviation | | | ICAO1 |
| 19 | DAAC | DALLAS WOOD TRUCKING | | | SCAC4 |
| 20 | DAAD | DANISHA SCULPTURE | | | SCAC4 |
| 21 | DAAE | DELMAS AMERICA AFRICA EUROPEAN LINE | | | SCAC1 |
| 22 | DAAE | DELMAS AMERICA AFRICA EUROPEAN LINE | | | SCAC4 |
| 23 | DAAFAR | Cuban Revolutionary Air and Air Defense Force | Defensa Anti-Aérea y Fuerza Aérea Revolucionaria | C | TRAFFIC |
| 24 | DAAG | DANGO EXPRESS INC | | | SCAC4 |
| 25 | DAAG | Deutsche Lastautomobilfabrik AG | | D | TRAFFIC |
| 26 | DAAH | DAUGHERTY, SCOTT TRUCKING | | | SCAC4 |
| 27 | DAAI | DIVERSIFIED AGRICULTURAL AND INDUST | | | SCAC4 |
| 28 | DAAM | D & A AUTO TRANSPORTATION LLC | | | SCAC4 |
| 29 | DAAS | DOUBLE AA TRANSPORTATION | | | SCAC4 |
| 30 | DAAU | DANISH MINISTRY OF DEFENCE ACQUISITION AND LOGISTICS ORGANISATION | | DK | BIC |
| 31 | DAAU | DANISH ARMY MATERIEL COMMAND | | | SCAC4 |
| 32 | DAB | Dassault Aviation | | F | AVCODES |
| 33 | DAB | Dassault Aviation | | | ICAO1 |
| 34 | DAB | Dansk Automobil Byggeri A/S | | DK | TRAFFIC |
| 35 | DABB | DANASONS BORDER SERVICES INC | | | SCAC4 |
| 36 | DABE | DREISBACH FREIGHT SERVICE (DIVISION | | | SCAC4 |
| 37 | DABI | DRIVE TRANSPORT INC | | | SCAC4 |
| 38 | DABL | D A B LOGISTICS INC | | | SCAC4 |
| 39 | DABM | DAMASKOI | | | SCAC4 |
| 40 | DABN | DIABLO TRUCKING INC | | | SCAC4 |
| 41 | DABO | DEANGELO BROTHERS INC | | | SCAC4 |
| 42 | DABR | D A TRANSPORT INC | | | SCAC4 |
| 43 | DABT | DIMAX EXPRESS INC | | | SCAC4 |
| 44 | DABX | Dingfelder & Balish, Inc. (DABX 100-119) (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 45 | DABX | Dingfelder & Balish, Inc. (DABX 6600-6619) | 7/1935 | | NAKINA |
| 46 | DAC | McDonnell Douglas Corp. | Callsign: Daco, Merged into Boeing Aircraft Company. | USA | AVCODES |
| 47 | DAC | Dominion Air Ltd. | Callsign: Dominion Air, | WAN | AVCODES |
| 48 | DAC | McDonnell Douglas | | | ICAO1 |
| 49 | DACA | DACSA TRUCKING LLC | | | SCAC4 |
| 50 | DACB | DOUBLE ACE CARGO INC | | | SCAC4 |
| 51 | DACC | DACCO INCORPORATED | | | SCAC4 |
| 52 | DACD | DAC | | | SCAC4 |
| 53 | DACF | DAYTON CONTAINERIZED FREIGHT INC | | | SCAC4 |
| 54 | DACI | DORMANS AUTO CENTER INC | | | SCAC4 |
| 55 | DACIA | AUTOMOBILE DACIA SA | | RO | VKM |
| 56 | DACK | D & A TRUCKING INC | | | SCAC4 |
| 57 | DACL | DOWNEAST ANTIQUES & COLLECTIBLES IN | | | SCAC4 |
| 58 | DACM | DAVILA GARCIA, DANIEL | | | SCAC4 |
| 59 | DACO | DAV-COR TRANSPORT INC | | | SCAC4 |
| 60 | DACS | DACS INC | | | SCAC4 |
| 61 | DACU | DANCONTAINER A/S | | DK | BIC |
| 62 | DACW | DAC SERVICES | | | SCAC4 |
| 63 | DACX | VIP Tank Car Service | added 1/1998; 7/2000; eliminated 7/2001; 7/2005 (not listed) | | NAKINA |
| 64 | DACX | Darling & Co. | 8/1920-1/1980; eliminated 10/1985 | | NAKINA |
| 65 | DACX | Darling & Co. | 4/38-1/80 | | NRHS |
| 66 | DACX | VIP Tank Car Service | added 1/98; 7/2000; eliminated 7/2001 | | NRHS |
| 67 | DACX | VIP TANK CAR SERVICES [DARLING & COMPANY] | | | PWRC |
| 68 | DACX | Darling and Company (VIP Tank Car Services) | | | RSRV |
| 69 | DACX | VIP TANK CAR | | | SCAC4 |
| 70 | DACY | DACON LOGISTICS LLC | | | SCAC4 |
| 71 | DACZ | DANA CORP. | | | PWRC |
| 72 | DAD | Dorado Air | Callsign: Dorado Air, | DOM | AVCODES |
| 73 | DAD | Air Express (Pvt) Ltd | Callsign: Dewan Express, | PK | AVCODES |
| 74 | DAD | Dorado Air | | | ICAO1 |
| 75 | DADA | DE ANDA TRUCKING | | | SCAC4 |
| 76 | DADC | DELAWARE AVENUE DISTRIBUTION CENTER | | | SCAC4 |
| 77 | DADL | D'AMICO DRY LIMITED | | | SCAC4 |
| 78 | DADN | D AND D OIL | | | SCAC4 |
| 79 | DADP | D AND D EXPRESS | | | SCAC4 |
| 80 | DADU | TANKTRAILER NEDERLAND | | NL | BIC |
| 81 | DADU | TANKTRAILER NEDERLAND | | | SCAC4 |
| 82 | DAE | DHL Aero Expreso, S.A. | IATA: D5, IATA Prefix: 992, Designator D5* recalled by IATA. IATA designator changed from DS* | PA | AVCODES |
| 83 | DAE | DHL Aero Express, S.A. | IATA: XP, IAATA changed to DS | PA | AVCODES |
| 84 | DAE | DHL Aero Expreso, S.A. | IATA: DS, IATA designator changed to D5 | PA | AVCODES |
| 85 | DAE | DHL Aero Expreso | | | ICAO1 |
| 86 | DAEA | DEFENDER AUTO EXPRESS | | | SCAC4 |
| 87 | DAEB | DAE TRANSPORT INC | | | SCAC4 |
| 88 | DAEI | DANIELS, ALFRED INC | | | SCAC4 |
| 89 | DAEM | D&E MAIL CONTRACTORS, INC | | | SCAC1 |
| 90 | DAEN | DALTON ENTERPRISES INC | | | SCAC4 |
| 91 | DAEQ | DOUBLE A ENTERPRISES INC | | | SCAC4 |
| 92 | DAF | Danish Air Force | Callsign: Danish Airforce, | DK | AVCODES |
| 93 | DAF | Dynamic Air | Callsign: Dynamic Air, | USA | AVCODES |
| 94 | DAF | Danish Air Force | | | ICAO1 |
| 95 | DAF | | | | TRAFFIC |
| 96 | DAFA | DE ANDA ALVAREZ, FERNANDO ANTONIO | | | SCAC4 |
| 97 | DAFD | DAY AFTER DAY SERVICE, INC. | | | SCAC1 |
| 98 | DAFG | DAYTON FREIGHT LINES, INC | | | SCAC1 |
| 99 | DAFG | DAYTON FREIGHT LINES INC | | | SCAC4 |
| 100 | DAFI | DAVIDSVILLE FUEL INC | | | SCAC4 |
