| 1 | DB | Brit Air | ICAO: BZH, Callsign: Britair, IATA Prefix: 750, Name changed to Brit Air t/a HOP! Brit Air. Name changed from Brittany Air International | F | AVCODES |
| 2 | DB | Air Niagara Express, Inc. | ICAO: DBD, Callsign: Air Niagara, | CDN | AVCODES |
| 3 | DB | Bulair | Callsign: Bulair, | BG | AVCODES |
| 4 | DB | Air Niagara (1978) Limited | ICAO: DBD, Callsign: Databird, | CDN | AVCODES |
| 5 | DB | Execaire Aviation Ltd. | ICAO: EXA, Callsign: Canadian Execaire, | CDN | AVCODES |
| 6 | DB | Brit Air t/a HOP! Brit Air | ICAO: BZH, Callsign: Britair, IATA Prefix: 750, Name changed from Brit Air. Name changed from Brittany Air International | F | AVCODES |
| 7 | DB | Maleth-Aero AOC Ltd | ICAO: MLT, Callsign: Maleth, IATA Prefix: 094, Name changed from Hangar 8 AOC Malta Limited t/a Maleth-Aero | M | AVCODES |
| 8 | DB | RETIRED 04-22-93 ATP | | | PWRC |
| 9 | DB | Deutsche Bundesbahn | | D | TRAFFIC |
| 10 | DB | Deutsche Bahn / DB AG | | DE | VKM |
| 11 | DB M | DB Museum Nürnberg | Nürnberg | D | privat-bahn.de |
| 12 | DBA | Air Alpha, Inc. | Callsign: Double-A, | USA | AVCODES |
| 13 | DBA | Air Alpha | | | ICAO1 |
| 14 | DBAB | DENO, BRIAN TRUCKING | | | SCAC4 |
| 15 | DBAC | DOUBLE A TRANSPORTATION LLC | | | SCAC4 |
| 16 | DBAF | DRY BULK AFRICA LTD | | | SCAC4 |
| 17 | DBAG | Deutsche Bahn AG. | | D | TRAFFIC |
| 18 | DBAK | DAKOTA BUCKAROO LLC | | | SCAC4 |
| 19 | DBAM | D AND B TRANSPORTATION COMPANY LLC | | | SCAC4 |
| 20 | DBAO | DEL-BO LOGISTICS | | | SCAC4 |
| 21 | DBAT | DUBOSE, JOHN M TRUCKING LLC | | | SCAC4 |
| 22 | DBB | Deutsche Bahn AG | IATA: 2A, Railway Service | D | AVCODES |
| 23 | DBB | DB Bahnbau | | D | TRAFFIC |
| 24 | DBBC | DAKOTA BEST BROKERAGE LLC | | | SCAC4 |
| 25 | DBBK | DOUBLE B BROKERAGE INC | | | SCAC4 |
| 26 | DBBL | DIBBLE TRUCKING INC | | | SCAC4 |
| 27 | DBBR | DOUBLE B BROKERAGE LLC | | | SCAC4 |
| 28 | DBBS | DOUBLE B SPECIALIZED CARRIERS LLC | | | SCAC4 |
| 29 | DBBV | D & B BUS INC | | | SCAC4 |
| 30 | DBC | Gemini Air Group, Inc. | Callsign: Diamond Back, | USA | AVCODES |
| 31 | DBC | DB Cargo | | D | TRAFFIC |
| 32 | DBCE | DBC ENTERPRISES INC | | | SCAC4 |
| 33 | DBCI | D-B CARTAGE INC | | | SCAC4 |
| 34 | DBCI | DB Cargo Italia | | I | TRAFFIC |
| 35 | DBCK | DIAMONDBACK EXPRESS INC | | | SCAC4 |
| 36 | DBCR | Deutsche Bahn Cargo Romania S.R.L. | | RO | TRAFFIC |
| 37 | DBCS | DORSETT BROTHERS CONCRETE SUPPLY | | | SCAC4 |
| 38 | DBCU | DRY BOX INC | | USA | BIC |
| 39 | DBCU | Dry Box | | | RSRV |
| 40 | DBCX | BASF Corp. | added 4/1986; 1/1994-7/2005 | | NAKINA |
| 41 | DBCX | Badische Corp. | added 7/1979; 1/1980; eliminated 4/1986; 1/1994 | | NAKINA |
| 42 | DBCX | Dow Badische Co. | added 1/1973; 1/1975; eliminated 7/1979 | | NAKINA |
| 43 | DBCX | Dowdle Brothers' Co. | 7/1930-7/1932 | | NAKINA |
| 44 | DBCX | Badische Corp. | added 7/79; 1/80; eliminated 4/86; 1/94 | | NRHS |
| 45 | DBCX | Dow Badische Co. | added 1/73; 1/75; eliminated 7/79 | | NRHS |
| 46 | DBCX | BASF Corp. | added 4/86; 1/94-7/2000 | | NRHS |
| 47 | DBCX | BASF CORPORATION [BADISCHE CORP.; DOW BADISCHE CO.; DOWDLE BROTHERS' CO.] | | | PWRC |
| 48 | DBCX | Dow Badische Corporation (BASF Corporation) | | | RSRV |
| 49 | DBCX | BASF CORPORATION | | | SCAC4 |
| 50 | DBCY | DELTA BROKERAGE COMPANY INC | | | SCAC4 |
| 51 | DBD | Air Niagara Express, Inc. | IATA: DB, Callsign: Air Niagara, | CDN | AVCODES |
| 52 | DBD | Air Niagara (1978) Limited | IATA: DB, Callsign: Databird, | CDN | AVCODES |
| 53 | DBD | Air Niagara Express | | | ICAO1 |
| 54 | DBDA | DOUBLE D TRUCKING | | | SCAC4 |
| 55 | DBDC | DB DISTRIBUTING INC | | | SCAC4 |
| 56 | DBDE | DOUBLE D EXPRESS, INC | | | SCAC1 |
| 57 | DBDE | DOUBLE D EXPRESS INC | | | SCAC4 |
| 58 | DBDG | DOUBLE DOG TRANSPORTATION | | | SCAC4 |
| 59 | DBDH | DBD EXPRESS | | | SCAC4 |
| 60 | DBDR | DOUBLE D TRUCKING | | | SCAC4 |
| 61 | DBDY | D-BAR-D | | | SCAC4 |
| 62 | DBE | Danube-Air Ltd. | Callsign: Dove, | H | AVCODES |
| 63 | DBED | DUNBAR, E D TRUCKING | | | SCAC4 |
| 64 | DBEE | D B EXPRESS | | | SCAC4 |
| 65 | DBEM | DOUBLE EIGHT MARINE S A | | | SCAC4 |
| 66 | DBEN | DREISBACH ENTERPRISES | | | SCAC4 |
| 67 | DBEP | DEVITO BROS ENTERPRISES INC | | | SCAC4 |
| 68 | DBES | DIAMONDBACK EXPRESS, INC | | | SCAC1 |
| 69 | DBFE | DOUBLE F ENTERPRISES INC | | | SCAC4 |
| 70 | DBFM | DOBBELS FARMS | | | SCAC4 |
| 71 | DBFO | ADBF-TOIX EQUIPMENT CORP | | | PWRC |
| 72 | DBFT | DOUBLE A FARMS LTD | | | SCAC4 |
| 73 | DBFZI | DB Fahrzeuginstandhaltung GmbH | | DE | VKM |
| 74 | DBG | Air Dabia (Gambia) Limited | Callsign: Danbo, | WAG | AVCODES |
| 75 | DBG | Döllnitzbahn GmbH | Mügeln | D | privat-bahn.de |
| 76 | DBG | Dampfzug-Betriebsgemeinschaft e.V. | Loburg | D | privat-bahn.de |
| 77 | DBG | Döllnitzbahn GmbH | Mügeln | D | privat-bahn.de |
| 78 | DBG | DB Gleisbau | | D | TRAFFIC |
| 79 | DBG | Deutsche Bahn Gleisbau | | DE | VKM |
| 80 | DBGC | DOUBLE G TRANSPORTATION LLC | | | SCAC4 |
| 81 | DBGG | DONALDSON, BRIAN GEORGE | | | SCAC4 |
| 82 | DBGI | DANBRO LOGISTICS INC | | | SCAC4 |
| 83 | DBGK | DOUBLE G TRUCKING & REPAIR LTD | | | SCAC4 |
| 84 | DBGM | Döllnitzbahn GmbH | | DE | VKM |
| 85 | DBGU | Dreambox Global | | | RSRV |
| 86 | DBGX | Debruce Grain, Inc. | added 1/2004; eliminated 4/2004; 7/2005 (not listed) | | NAKINA |
| 87 | DBGX | Dowdle Butane Gas Co., Inc. | added 1/1968; 4/1970-1/1980; eliminated 4/1986 | | NAKINA |
| 88 | DBGX | Dowdle Butane Gas Co., Inc. | added 1/68; 4/70-1/80; eliminated 4/86 | | NRHS |
| 89 | DBGX | *DOWDLE BUTANE GAS CO. | | | PWRC |
| 90 | DBGX | +DEBRUCE GRAIN, INC. | | | PWRC |
| 91 | DBGX | Dowdle Butane Gas | | | RSRV |
| 92 | DBGX | DEBRUCE GRAIN INC | | | SCAC4 |
| 93 | DBGZ | DEBRUCE GRAIN | | | PWRC |
| 94 | DBGZ | DB Gebrauchtzug | | D | TRAFFIC |
| 95 | DBH | Northeast Airlines Co. Ltd. | IATA: NS, IATA Prefix: 836, Name changed to Hebei Airlines. Taken over by Sichuan Airlines and renamed Hebei Airlines. | PRC | AVCODES |
| 96 | DBHI | DORAN BROTHERS INC | | | SCAC4 |
| 97 | DBHK | DOUBLE H TRUCKING INC | | | SCAC4 |
| 98 | DBHL | DOYLE, BRIAN HORSE TRANSPORT LIMITE | | | SCAC4 |
| 99 | DBIG | DBI LOGISTICS INC | | | SCAC4 |
| 100 | DBIK | DOLLAR BILL TRUCKING | | | SCAC4 |
