| 1 | DT | Decatur Junction Ry. Co. | 1/1994-7/2005 (not listed) | | NAKINA |
| 2 | DT | Detroit Terminal R.R. Co. | 8/1920-10/1966 & 1/1975-1/1980; eliminated 1/1982 | | NAKINA |
| 3 | DT | Detroit Terminal R.R. Co. | 7/23-10/66 & 1/75-1/80; eliminated 1/82 | | NRHS |
| 4 | DT | Decatur Junction Ry. Co. | 1/94-7/2000 | | NRHS |
| 5 | DT | DECATUR JUNCTION RAILWAY COMPANY [DETROIT TERMINAL RR] | | | PWRC |
| 6 | DT | Decatur Junction Railway | | | RSRV |
| 7 | DT | DECATUR JUNCTION RAILWAY | | | SCAC4 |
| 8 | DT | Detroit Terminal R.R. Co. | | USA | TRAFFIC |
| 9 | DT&I | Detroit, Toledo & Ironton R.R. (Co.) | 8/1920-10/1966 | | NAKINA |
| 10 | DT&I | Detroit, Toledo & Ironton R.R. Co. | 23-Jul | | NRHS |
| 11 | DT&I | Detroit, Toledo & Ironton R.R. | 4/38-10/66 | | NRHS |
| 12 | DT&I | CANADIAN NATIONAL RAILWAY [GRAND TRUNK WESTERN RR; DETROIT, TOLEDO & IRONTON] | | | PWRC |
| 13 | DTA | TAAG Angola Airlines | IATA: DT | | ICAO1 |
| 14 | DTA | Dartford Tunnel Authority | | GB | TRAFFIC |
| 15 | DTAA | D C T TRANSPORT INC | | | SCAC4 |
| 16 | DTAB | DOBSON TRUCKING | | | SCAC4 |
| 17 | DTAI | DIANAS IMPORTS INC | | | SCAC4 |
| 18 | DTAO | DAVIS INDUSTRIES INC | | | SCAC4 |
| 19 | DTAQ | DRACO TRUCKING | | | SCAC4 |
| 20 | DTAR | DOUCETTES BOATBUILDING LTD | | | SCAC4 |
| 21 | DTAS | DATA SALES CO INC | | | SCAC4 |
| 22 | DTAT | DELTA TRANSPORTATION | | | SCAC4 |
| 23 | DTAU | HUBEI DONG RUNZE SPECIAL VEHICLE EQUIPMENT CO., LTD. | | PRC | BIC |
| 24 | DTAZ | DOMINION TERMINAL ASSOCIATION | | | PWRC |
| 25 | DTBB | DERO TRANSPORTATION INC | | | SCAC4 |
| 26 | DTBD | D & A TRANSPORT | | | SCAC4 |
| 27 | DTBEK | MÁV Dunántúli Távközlési és Biztosítóberendezés Építő Kft. | | HU | VKM |
| 28 | DTBH | DEPPE TRANSPORT SERVICES INC | | | SCAC4 |
| 29 | DTBR | DTB | | | SCAC4 |
| 30 | DTCD | DELEURME TRUCKING LTD | | | SCAC4 |
| 31 | DTCH | DISTTECH | | | SCAC4 |
| 32 | DTCL | DIRECT CONTAINER LINE | | | SCAC4 |
| 33 | DTCM | DALLAND TRANSPORT COMPANY INC | | | SCAC4 |
| 34 | DTCN | DAVIS & DAVIS TRANSPORT LLC | | | SCAC4 |
| 35 | DTCS | D T TRANSPORT INC | | | SCAC4 |
| 36 | DTCU | DECCAN TRANSCON LEASING PVT LTD | | IND | BIC |
| 37 | DTCW | DIANE TANKER CORPORATION | | | SCAC4 |
| 38 | DTCX | DTE Transportation Services, Inc. | 7/2005 | | NAKINA |
| 39 | DTCX | DTE Coal Services | added 4/2009 | | NAKINA |
| 40 | DTCX | DTE Coal Services, Inc. | added 7/2001; eliminated 1/2009 | | NAKINA |
| 41 | DTCX | DTE Transportation Services, Inc. | 7/2000 (not listed) | | NAKINA |
| 42 | DTCX | Domtar Ltd. | added 10/1965; 10/1966-4/1970; eliminated 7/1973 | | NAKINA |
| 43 | DTCX | Dominion Tar & Chemical Co., Ltd. | 8/1920-7/1965; eliminated 10/1965 | | NAKINA |
| 44 | DTCX | Dominion Tar & Chemical Co., Ltd. | 4/38-7/65; eliminated 10/65 | | NRHS |
| 45 | DTCX | Domtar Ltd. | added 10/65; 10/66-4/70; eliminated 7/73 | | NRHS |
| 46 | DTCX | DTE Transportation Services, Inc. | Jul-00 | | NRHS |
| 47 | DTCX | DTE Coal Services, Inc. | added 7/2001 | | NRHS |
| 48 | DTCX | *DOMTAR LTD. [DOMINION TAR & CHEMICAL CO., LTD.] | | | PWRC |
| 49 | DTCX | +DTE TRANSPORTATION SERVICES, INC. | | | PWRC |
| 50 | DTCX | DTE Transportation Services | | | RSRV |
| 51 | DTCX | DTE COAL SERVICES INC | | | SCAC4 |
| 52 | DTCX | Dominion Tar & Chemical Co., Ltd. | | USA | TRAFFIC |
| 53 | DTDA | DEEANNS TRUCKING DISPATCHERS | | | SCAC4 |
| 54 | DTDC | DAY TO DAY LOGISTICS INC | | | SCAC4 |
| 55 | DTDD | D TRANS | | | SCAC4 |
| 56 | DTDE | D & T DELIVERY INC | | | SCAC4 |
| 57 | DTDF | DEPENDABLE TRANSPORT INC | | | SCAC4 |
| 58 | DTDJ | DALTON TRUCKING INC | | | SCAC4 |
| 59 | DTDK | DANS TRANSPORT CORP | | | SCAC4 |
| 60 | DTDL | DOOR TO DOOR SERVICES | | | SCAC4 |
| 61 | DTDQ | DIRT DOCTORS LLC | | | SCAC4 |
| 62 | DTDR | DTD CARGO SA | | | SCAC4 |
| 63 | DTDS | DAWN TO DAWN EXPRESS | | | SCAC4 |
| 64 | DTDX | Dow Chemical Co., Texas Division | 4/1961; added 10/1961; 7/1965; eliminated 1/1966 | | NAKINA |
| 65 | DTDX | General American Transportation Corp. | added 7/1958; eliminated 10/1958 | | NAKINA |
| 66 | DTDX | Dow Chemical Co., Texas Division | 1/1943-10/1957; eliminated 7/1958 | | NAKINA |
| 67 | DTDX | Dow Chemical Co., Texas Division | 1/52-10/57; eliminated 7/58 | | NRHS |
| 68 | DTDX | General American Transportation Corp. | added 7/58; eliminated 10/58 | | NRHS |
| 69 | DTDX | Dow Chemical Co., Texas Division | 4/61-7/65; eliminated 1/66 | | NRHS |
| 70 | DTDX | DOW CHEMICAL CO., TEXAS DIV. (GENERAL AMERICAN TRANSPORTATION CORP.) | | | PWRC |
| 71 | DTE | Tamas Darida Enterprise | Callsign: Darida-Air, | H | AVCODES |
| 72 | DTE | DRESSER TRANSPORTATION EQUIPMENT DIV. OF DRESSER INDUSTRIES | | | PWRC |
| 73 | DTEA | DUECK TRUCKING | | | SCAC4 |
| 74 | DTED | DIRECT TRANSPORTATION | | | SCAC4 |
| 75 | DTEE | D & T ENTERPRISES INC | | | SCAC4 |
| 76 | DTEH | DESTINY TRUCKING | | | SCAC4 |
| 77 | DTEI | DIRECT TRANSIT EXPRESS LLC | | | SCAC4 |
| 78 | DTEL | DETONADORES ESTRELLA S A DE C V | | | SCAC4 |
| 79 | DTEO | DOUBLE TROUBLE TRUCKING INC | | | SCAC4 |
| 80 | DTEP | DENANA TRANSPORT | | | SCAC4 |
| 81 | DTER | DATE TRUCKING LLC | | | SCAC4 |
| 82 | DTEW | DWIGHT TRUCKING INC | | | SCAC4 |
| 83 | DTEX | Dresser Transportation Equipment Division, Dresser Industries, Inc. (test cars) | 1/1994-7/2005 (not listed) | | NAKINA |
| 84 | DTEX | Dresser Transportation Equipment Division, Dresser Industries, Inc. | added 10/1969; 4/1970-1/1980; eliminated 1/1981 | | NAKINA |
| 85 | DTEX | Dresser Transportation Equipment Division, Dresser Industries, Inc. | added 10/69; 4/70-1/80; eliminated 1/81 | | NRHS |
| 86 | DTEX | Dresser Transportation Equipment Division, Dresser Industries, Inc. (test cars) | 1/94-7/2000 | | NRHS |
| 87 | DTEX | DRESSER TRANSPORTATION EQUIPMENT DIV. OF DRESSER INDUSTRIES (TEST CARS) | | | PWRC |
| 88 | DTEX | Dresser Transportation Equipment | | | RSRV |
| 89 | DTEX | DRESSER TRANSPORTATION EQUIPMENT DI | | | SCAC4 |
| 90 | DTEY | DOWD, TERRY INC | | | SCAC4 |
| 91 | DTFC | DEPENDABLE TRANSFER LLC | | | SCAC4 |
| 92 | DTFE | DIRECT TRANSFER EXPRESS | | | SCAC4 |
| 93 | DTFF | DILLS TRUCKING INC | | | SCAC4 |
| 94 | DTFG | DONARD TRANSPORTATION LLC | | | SCAC4 |
| 95 | DTFH | DIXON TRANSPORT INC | | | SCAC4 |
| 96 | DTFK | DAN TRUCKING INC | | | SCAC4 |
| 97 | DTFL | DESIGN TURF TECHNOLOGIES INC | | | SCAC4 |
| 98 | DTFM | D-THREE (D-3) FARMS | | | SCAC4 |
| 99 | DTFR | DT & FREIGHT COMPANY INC | | | SCAC4 |
| 100 | DTFS | DIAMOND TOWING & FLOAT SERVICE INC | | | SCAC4 |
