| 1 | DG | Air Atlantique (General Aviation Services Ltd.) | ICAO: AAG, Callsign: Atlantic, Designator DG recalled by IATA | GB | AVCODES |
| 2 | DG | Air Provence International | ICAO: APR, Callsign: Air Provence, IATA designator changed to P3 | F | AVCODES |
| 3 | DG | Island Airlines Pty Ltd. | Placed into receivership on 01 August 2000. | AUS | AVCODES |
| 4 | DG | South East Asian Airlines (SEAIR) International, Inc. | ICAO: SRQ, Callsign: Seair, Name changed to Tigerair Philippines. Name changed from Seair Incorporated | RP | AVCODES |
| 5 | DG | Custom Air Transport, Inc. | ICAO: CTT, Callsign: Catt, Designator DG* recalled by IATA | USA | AVCODES |
| 6 | DG | Tigerair Philippines | ICAO: SRQ, Callsign: Seair, Name changed from South East Asian Airlines (SEAIR) International, Inc. Name changed from Seair Incorporated | RP | AVCODES |
| 7 | DG | Cebgo Inc. d/b/a Cebgo | ICAO: SRQ, Callsign: Blue Jay, Name changed from Tigerair Philippines | RP | AVCODES |
| 8 | DG | Desquenne & Giral | | F | TRAFFIC |
| 9 | DGA | Yellow River Delta General Aviation Co., Ltd | Callsign: Yellow River, | PRC | AVCODES |
| 10 | DGAD | DELGADO TRUCKING EXPRESS CORP | | | SCAC4 |
| 11 | DGAL | DEGRANDE, AL TRUCKING | | | SCAC4 |
| 12 | DGAM | DEEM, GARY | | | SCAC4 |
| 13 | DGAS | DAVIS, GREG AND SONS TRUCKING | | | SCAC4 |
| 14 | DGAT | DUTCHLAND REFRIGERATED TRANSPORT IN | | | SCAC4 |
| 15 | DGBL | DIGBY LLC | | | SCAC4 |
| 16 | DGBM | DRAGON BOAT EAST MANAGEMENT INCORPO | | | SCAC4 |
| 17 | DGBR | DOUGLAS TRUCKING | | | SCAC4 |
| 18 | DGBU | NEP UK LTD | | GB | BIC |
| 19 | DGBY | Digby Trucklines | 7/2000-7/2005 | | NAKINA |
| 20 | DGBY | Digby Trucklines | Jul-00 | | NRHS |
| 21 | DGBY | DIGBY TRUCKLINES | | | PWRC |
| 22 | DGBY | Digby Truck Lines | | | RSRV |
| 23 | DGC | Servicio Aereo de la Guardia Civil | | E | AVCODES |
| 24 | DGCC | DIGNITY CHARTERING CORPORATION | | | SCAC4 |
| 25 | DGCI | DELGADO CARRILLO, JAVIER | | | SCAC4 |
| 26 | DGCL | DISTINGUISHED CHARTERS LLC | | | SCAC4 |
| 27 | DGCN | DELALLO, GEORGE COMPANY INC | | | SCAC4 |
| 28 | DGCO | D G C | | | SCAC4 |
| 29 | DGCX | Dakota Gasification Co. | added 10/1996; 7/2000-7/2005 | | NAKINA |
| 30 | DGCX | The Diamond Gasoline Co. | 8/1920-7/1923 | | NAKINA |
| 31 | DGCX | Dakota Gasification Co. | added 10/96; 7/2000 | | NRHS |
| 32 | DGCX | *DIAMOND GASOLINE CO. | | | PWRC |
| 33 | DGCX | +DAKOTA GASIFICATION COMPANY | | | PWRC |
| 34 | DGCX | Dakota Gasification | | | RSRV |
| 35 | DGD | Skyway | Callsign: Tbilavia, | GE | AVCODES |
| 36 | DGDJ | DELGADO, JAVIER | | | SCAC4 |
| 37 | DGDK | D & G DUMP TRUCK SERVICE INC | | | SCAC4 |
| 38 | DGDO | DMG LOGISTICS INC | | | SCAC4 |
| 39 | DGDS | DILIGENT DELIVERY SYSTEMS | | | SCAC4 |
| 40 | DGDV | DELGADO, GUSTAVO | | | SCAC4 |
| 41 | DGEC | DMD LOGISTICS INC | | | SCAC4 |
| 42 | DGEG | Deutsche Gesellschaft für Eisenbahn Geschichte e.V. | Bochum | D | privat-bahn.de |
| 43 | DGEG | DE GRAAF EXACAVTING LTD | | | SCAC4 |
| 44 | DGEG | Eisenbahnmuseum Bochum-Dahlhausen | | D | TRAFFIC |
| 45 | DGEG | DGEG Bahnen & Reisen Bochum AG | | DE | VKM |
| 46 | DGEL | DOUBLE GG TRUCKING LLC | | | SCAC4 |
| 47 | DGEN | DAGEN TRUCKING INC | | | SCAC4 |
| 48 | DGES | DOUGLAS EXPRESS INC | | | SCAC4 |
| 49 | DGFC | D & G FREIGHT SOLUTIONS LLC | | | SCAC4 |
| 50 | DGFL | D & G FARMS LTD | | | SCAC4 |
| 51 | DGFM | DHL GLOBAL FORWARDING GMBH | | | SCAC4 |
| 52 | DGFR | DE GRAAF RANCH TRUCKING | | | SCAC4 |
| 53 | DGFU | DANMAR LINES LTD | | CH | BIC |
| 54 | DGFU | DANMAR LINES LTD | | | SCAC4 |
| 55 | DGGD | DOLGOFF, GARY (GARY DOLGOFF COMICS) | | | SCAC4 |
| 56 | DGGT | DOGGETT CONSTRUCTION CO INC | | | SCAC4 |
| 57 | DGGU | DAWSONGROUP GLOBAL | | GB | BIC |
| 58 | DGHX | Searles Valley Minerals Operations | added 7/2007 | | NAKINA |
| 59 | DGHX | North American Chemical | added 10/2006; eliminated 7/2007 | | NAKINA |
| 60 | DGHX | IMC Chemicals | added 1/2002; 7/2005 | | NAKINA |
| 61 | DGHX | North American Chemical | added 7/1992; 1/1994-7/2000; eliminated 1/2002 | | NAKINA |
| 62 | DGHX | North American Chemical | added 7/92; 1/94-7/2000 | | NRHS |
| 63 | DGHX | *NORTH AMERICAN CHEMICAL CO. (IMC CHEMICALS) | | | PWRC |
| 64 | DGHX | +SEARLES VALLEY MINERALS OPERATIONS, INC. | | | PWRC |
| 65 | DGHX | North American Chemical | | | RSRV |
| 66 | DGHX | SEARLES VALLEY MINERALS OPERATIONS | | | SCAC4 |
| 67 | DGIA | DALIAN GIANT INTERNATIONAL SHIPPING | | | SCAC4 |
| 68 | DGIC | DREYERS GRAND ICE CREAM INC | | | SCAC4 |
| 69 | DGIK | DGI TRUCKING INC | | | SCAC4 |
| 70 | DGIQ | DGI GEOSCIENCE INC | | | SCAC4 |
| 71 | DGIS | DRAGON ENTERPRISES | | | SCAC4 |
| 72 | DGIU | ISOCHEM LOGISTICS LLC | | USA | BIC |
| 73 | DGIX | D and G Enterprises LLC | 7/2005 (not listed) | | NAKINA |
| 74 | DGIX | D & G ENTERPRISES, LLC | | | PWRC |
| 75 | DGIX | D and G Enterprises | | | RSRV |
| 76 | DGIX | D AND G ENTERPRISES LLC | | | SCAC4 |
| 77 | DGKG | DMCGEE TRUCKING | | | SCAC4 |
| 78 | DGKQ | DNJ LOGISTICS | | | SCAC4 |
| 79 | DGKW | DONG-A TANKER CORP | | | SCAC4 |
| 80 | DGL | D.G.L. Air | | AM | AVCODES |
| 81 | DGLA | DOUGLAS, ROSS | | | SCAC4 |
| 82 | DGLB | DIVERSIFIED GLOBAL LOGISTICS INC | | | SCAC4 |
| 83 | DGLC | DHUGA LOGISTICS | | | SCAC4 |
| 84 | DGLE | DAIGLE, L M OIL DISTRIBUTORS LLC | | | SCAC4 |
| 85 | DGLG | DIPLOMAT GLOBAL LOGISTICS INC | | | SCAC4 |
| 86 | DGLK | DOGS LIFE TRUCKING LLC | | | SCAC4 |
| 87 | DGLR | DAIGLE, ROBERT & SONS INC | | | SCAC4 |
| 88 | DGLU | DI GREGORIO NAVEGACAO LTDA | | | SCAC4 |
| 89 | DGM | Dampflok-Gesellschaft München e.V (DGM) | | DE | VKM |
| 90 | DGMD | D G M DISTRIBUTION | | | SCAC4 |
| 91 | DGMI | DILER GEMI KIRALAMA VE | | | SCAC4 |
| 92 | DGML | DECLOET GREENHOUSE MFG LTD | | | SCAC4 |
| 93 | DGMT | Deutsche Gleisbau Material Transport GmbH | Möllenhagen | D | privat-bahn.de |
| 94 | DGMT | Deutsche Gleisbau und Material GmbH | | D | TRAFFIC |
| 95 | DGMT | Deutsche Gleisbau Material Transport GmbH | | DE | VKM |
| 96 | DGNA | DOMINION GRANITE LTD | | | SCAC4 |
| 97 | DGNC | DESIGN CORRUGATING CO | | | SCAC4 |
| 98 | DGNK | DELONG AND SONS TRUCKING INC | | | SCAC4 |
| 99 | DGNO | Dallas, Garland & Northeastern R.R., Inc. | 1/1994; added 7/1994; 7/2000-7/2005 | | NAKINA |
| 100 | DGNO | Dallas, Garland & Northeastern R.R., Inc. | 1/94; added 7/94; 7/2000 | | NRHS |
