| 5201 | DTHF | DENNY TRUCKING | | | SCAC4 |
| 5202 | DTHG | DESTINY TRANSPORT | | | SCAC4 |
| 5203 | DTHL | DT TRUCKING LLC | | | SCAC4 |
| 5204 | DTI | Grand Trunk Western R.R. Inc. | added 1/1984; 1/1994-7/2005 | | NAKINA |
| 5205 | DTI | Detroit, Toledo & Ironton R.R. Co. | 4/1961-10/1966 & 1/1975-1/1980; eliminated 1/1984 | | NAKINA |
| 5206 | DTI | Detroit, Toledo & Ironton R.R. Co. | 4/61-10/66 & 1/75-1/80 | | NRHS |
| 5207 | DTI | Grand Trunk Western R.R. Inc. | 1/94-7/2000 | | NRHS |
| 5208 | DTI | CANADIAN NATIONAL RAILWAY [GRAND TRUNK WESTERN RR; DETROIT, TOLEDO & IRONTON] | | | PWRC |
| 5209 | DTI | Detroit, Toledo and Ironton Railroad (Canadian National Railway) | | | RSRV |
| 5210 | DTI | Detroit, Toledo & Ironton R.R. Co. | | USA | TRAFFIC |
| 5211 | DTIB | DAVIDSON TRUCKING INC | | | SCAC4 |
| 5212 | DTIC | D T I INC | | | SCAC4 |
| 5213 | DTID | D T I DIVERSIFIED TRANSPORTATION IN | | | SCAC4 |
| 5214 | DTIH | DELUX TRUCKING INC | | | SCAC4 |
| 5215 | DTII | DEAN TRANSPORTATION, INC. | | | SCAC4 |
| 5216 | DTIK | DEVALL TRUCKING INC | | | SCAC4 |
| 5217 | DTIL | DTI LOGISTICS INC | | | SCAC4 |
| 5218 | DTIM | DIMARE TAMPA INC | | | SCAC4 |
| 5219 | DTIN | D T INC | | | SCAC4 |
| 5220 | DTIO | DITCO, INC | | | SCAC1 |
| 5221 | DTIO | DTI INTERNATIONAL | | | SCAC4 |
| 5222 | DTIP | DIRECT TRANSPORTATION INC | | | SCAC4 |
| 5223 | DTIQ | DLD TRANSPORTATION INC | | | SCAC4 |
| 5224 | DTIR | DTI | | | SCAC4 |
| 5225 | DTIT | DILLON TRANSPORT INC | | | SCAC4 |
| 5226 | DTIZ | *CANADIAN NATIONAL RAILWAY [GRAND TRUNK WESTERN RR] | | | PWRC |
| 5227 | DTIZ | *DETERMAN INDUSTRIES | | | PWRC |
| 5228 | DTIZ | Detroit, Toledo and Ironton Railroad (Canadian National Railway) | | | RSRV |
| 5229 | DTIZ | GRAND TRUNK WESTERN RAILROAD COMPAN | | | SCAC4 |
| 5230 | DTJB | DITTRICH TRUCKING | | | SCAC4 |
| 5231 | DTJF | DTS FLATBED SERVICES LLC | | | SCAC4 |
| 5232 | DTJI | DEERE THIBODAUX, JOHN INC | | | SCAC4 |
| 5233 | DTJM | DITUCCI, JM AND SON LLC | | | SCAC4 |
| 5234 | DTKB | DOUGLAS TRUCKING | | | SCAC4 |
| 5235 | DTKE | DENMAN TRUCKING LLC | | | SCAC4 |
| 5236 | DTKF | DALAN TRUCKING INC | | | SCAC4 |
| 5237 | DTKH | DORTCH TRUCKING | | | SCAC4 |
| 5238 | DTKI | DSR TRUCKING INC | | | SCAC4 |
| 5239 | DTKJ | DELLROSE TRUCKING LLC | | | SCAC4 |
| 5240 | DTKK | DILLARD TRUCKING INC | | | SCAC4 |
| 5241 | DTKL | DIRECTLINK TRANSPORT CORP | | | SCAC4 |
| 5242 | DTKM | DISSE TRUCKING LLC | | | SCAC4 |
| 5243 | DTKO | DURST TRUCKING CO | | | SCAC4 |
| 5244 | DTKP | DAILY TRUCKING & TRANSPORT | | | SCAC4 |
| 5245 | DTKQ | DARTMORE TRUCKING CORP | | | SCAC4 |
| 5246 | DTKR | DAVES TRUCK REPAIR | | | SCAC4 |
| 5247 | DTKS | DISTRIBUIDORA DE TORNILLOS KELIHER | | | SCAC4 |
| 5248 | DTKT | DEROSE TRUCKING LLC | | | SCAC4 |
| 5249 | DTKU | DURATEK | | | SCAC4 |
| 5250 | DTKW | DELTA TRUCKING LLC | | | SCAC4 |
| 5251 | DTKY | DANIEL TRUCKING | | | SCAC4 |
| 5252 | DTL | Aero Occidental, S.A. de C.V. | Callsign: Aero Occidental, | MEX | AVCODES |
| 5253 | DTL | Aero Dili Transport Services S.A. d/b/a AERO DILI | IATA: 8G, Callsign: Aero Dili, | TL | AVCODES |
| 5254 | DTLB | DALMATIAN TRANSPORTATION LTD | | | SCAC4 |
| 5255 | DTLC | DAISY TRUCKING LLC | | | SCAC4 |
| 5256 | DTLD | D T L INC | | | SCAC4 |
| 5257 | DTLE | DTL | | | SCAC4 |
| 5258 | DTLF | DOLAN TRANSPORTATION LLC | | | SCAC4 |
| 5259 | DTLG | D & T LEASING | | | SCAC4 |
| 5260 | DTLH | DAHL TRUCKING LLC | | | SCAC4 |
| 5261 | DTLK | DTH TRUCKING & LOGISTICS INC | | | SCAC4 |
| 5262 | DTLM | DECOR TRADEMARKS LIMITED | | | SCAC4 |
| 5263 | DTLN | DOT LINES INC | | | SCAC4 |
| 5264 | DTLO | DTL INC | | | SCAC4 |
| 5265 | DTLP | DENNEY TRANSPORT LTD | | | SCAC4 |
| 5266 | DTLQ | DTL LOGISTICS INC | | | SCAC4 |
| 5267 | DTLR | DESTINATION LOGISTICS INC | | | SCAC4 |
| 5268 | DTLS | DIRECT TRANSIT LINES, INC | | | SCAC4 |
| 5269 | DTLT | DEITLOFF TRANSFER, INC | | | SCAC1 |
| 5270 | DTLU | DANTECO INDUSTRIES BV | | NL | BIC |
| 5271 | DTLU | DUTCH TANKCONTAINER LEASING BV | | | SCAC4 |
| 5272 | DTLW | DENBOW TRANSPORT LTD | | | SCAC4 |
| 5273 | DTLX | Delta Tank Line Co. | added 7/1963; 7/1965-1/1980; eliminated 7/1992; 1/1994-7/2005 (not listed) | | NAKINA |
| 5274 | DTLX | Delta Tank Line Co. | added 7/63; 7/65-1/80; eliminated 7/92; 1/94-7/2000 | | NRHS |
| 5275 | DTLX | DELTA TANK LINE CO. | | | PWRC |
| 5276 | DTLX | Delta Tank Line | | | RSRV |
| 5277 | DTLX | DELTA TANK LINE CO. | | | SCAC4 |
| 5278 | DTM | Deutsches Technikmuseum Berlin | Berlin | D | privat-bahn.de |
| 5279 | DTM | DETROIT, TOLEDO & MILWAUKEE RAILROAD CO. | | | PWRC |
| 5280 | DTMA | DILETON MARITIME S A | | | SCAC4 |
| 5281 | DTMD | DTM DISTRIBUTORS INC | | | SCAC4 |
| 5282 | DTME | DANACA TRANSPORT MONTREAL LTEE | | | SCAC4 |
| 5283 | DTMI | D T M INC | | | SCAC4 |
| 5284 | DTML | DONNELLY TANKER MANAGEMENT LTD | | | SCAC4 |
| 5285 | DTMN | D TODO IMPORTACIONES | | | SCAC4 |
| 5286 | DTMO | DIRT MOVERS INC | | | SCAC4 |
| 5287 | DTMP | DETROIT TOOL METAL PRODUCTS COMPANY | | | SCAC4 |
| 5288 | DTMR | Denver Terminal R.R. Co. | added 10/1987; eliminated 4/1990 | | NAKINA |
| 5289 | DTMR | Denver Terminal R.R. Co. | added 10/87; eliminated 4/90 | | NRHS |
| 5290 | DTMR | DENVER TERMINAL RAILROAD CO. | | | PWRC |
| 5291 | DTMT | DUNN THE MOVER LTD | | | SCAC4 |
| 5292 | DTMV | DATAMARK DE MEXICO SA DE CV | | | SCAC4 |
| 5293 | DTN | DATA International Aviation | Callsign: Data Air, | SUD | AVCODES |
| 5294 | DTN | Data International | | | ICAO1 |
| 5295 | DTNA | DARTRANS INC | | | SCAC4 |
| 5296 | DTNC | NORTH CAROLINA DEPARTMENT OF TRANSPORTATION | | | PWRC |
| 5297 | DTNE | DESERET TRANSPORTATION SYSTEMS LLC | | | SCAC4 |
| 5298 | DTNF | DAVIS TRANSFER COMPANY INC | | | SCAC4 |
| 5299 | DTNH | D & T TRANSPORT LLC | | | SCAC4 |
| 5300 | DTNL | D TRUCKING LINE INC | | | SCAC4 |
