| 3101 | DLUC | DAMM, LUCAS | | | SCAC4 |
| 3102 | DLUD | DRIVE LOGISTICS US LTD | | | SCAC4 |
| 3103 | DLVC | DE LA VEINTE CANS TRUCKING | | | SCAC4 |
| 3104 | DLVK | DE LA VEINTE CANS TRUCKING | | | SCAC4 |
| 3105 | DLVL | DE LEON VAN LINES INC | | | SCAC4 |
| 3106 | DLVM | DEL/VAL ADVANTAGE MESSENGERS | | | SCAC4 |
| 3107 | DLVR | DELIVERY ON TIME LTD | | | SCAC4 |
| 3108 | DLVT | DIRECT DELIVERY TODAY LLC | | | SCAC4 |
| 3109 | DLVU | DELVER AGENTS LLC | | USA | BIC |
| 3110 | DLVX | Thiokol Corp. | 7/2005 (not listed) | | NAKINA |
| 3111 | DLVX | Thiokol Corp.—UTAH DLV | eliminated 10/2002 | | NAKINA |
| 3112 | DLVX | Thiokol Corp. | added 4/1997; 7/2000 | | NAKINA |
| 3113 | DLVX | Thiokol Corp. | added 4/97; 7/2000 | | NRHS |
| 3114 | DLVX | THIOKOL CORPORATION | | | PWRC |
| 3115 | DLVX | Thiokol Corporation | | | RSRV |
| 3116 | DLVY | DELIVERY INC | | | SCAC4 |
| 3117 | DLW | Consolidated Rail Corp. | 1/1980; 1/1994; eliminated 7/1999 | | NAKINA |
| 3118 | DLW | Erie Lackawanna R.R. Co. (Delaware, Lackawanna & Western R.R. Co.) | 1/1975 | | NAKINA |
| 3119 | DLW | Erie Lackawanna R.R. Co. (Delaware, Lackawanna & Western R.R. Co.) | Jan-75 | | NRHS |
| 3120 | DLW | Consolidated Rail Corp. | 1/80; 1/94; eliminated 7/99 | | NRHS |
| 3121 | DLW | Dampflokwerk Meiningen | Meiningen | D | privat-bahn.de |
| 3122 | DLW | CONRAIL CORP. [ERIE LACKAWANNA RAILROAD CO.; DELAWARE, LACKAWANA & WESTERN RR] | | | PWRC |
| 3123 | DLW | Delaware, Lackawanna and Western Railroad (Norfolk Southern) | | | RSRV |
| 3124 | DLW | Delaware, Lackawanna & Western R.R. | | USA | TRAFFIC |
| 3125 | DLWR | Depew, Lancaster & Western R.R. Co., Inc. | 1/1994-7/2000; added 7/2002; eliminated 1/2005; 7/2005 (not listed) | | NAKINA |
| 3126 | DLWR | Depew, Lancaster & Western R.R. Co., Inc. | 1/94-7/2000 | | NRHS |
| 3127 | DLWR | DEPEW, LANCASTER & WESTERN RAILROAD COMPANY | | | PWRC |
| 3128 | DLWR | Depew, Lancaster and Western Railroad | | | RSRV |
| 3129 | DLWR | Depew, Lancaster & Western R.R. Co., Inc. | | USA | TRAFFIC |
| 3130 | DLWU | DIRSOON LOGISTICS CO LTD | | | SCAC4 |
| 3131 | DLWX | D.L. & W., Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 3132 | DLWX | D.L. & W., Inc. | Jul-00 | | NRHS |
| 3133 | DLWX | D. L. & W., INC. | | | PWRC |
| 3134 | DLWX | Delaware, Lackawanna and Western Railroad (Norfolk Southern) | | | RSRV |
| 3135 | DLWX | DL & W INC | | | SCAC4 |
| 3136 | DLX | Dreamline Aviation, LLC | Callsign: Dreamline, | USA | AVCODES |
| 3137 | DLX | Catelli Food Products, Ltd. | added 4/1962; eliminated 7/1964 | | NAKINA |
| 3138 | DLX | Dyson's Ltd. | 1/1950-4/1961; eliminated 4/1962 | | NAKINA |
| 3139 | DLX | Dierks Lumber & Coal Co. | 1/1945 | | NAKINA |
| 3140 | DLX | Dyson's Ltd. | 1/52-4/61; eliminated 4/62 | | NRHS |
| 3141 | DLX | Catelli Food Products, Ltd. | added 4/62; eliminated 7/64 | | NRHS |
| 3142 | DLX | *DIERKS LUMBER & COAL CO. | | | PWRC |
| 3143 | DLX | *CATELLI FOOD PRODUCTS, LTD. [DAYSON'S LTD.] | | | PWRC |
| 3144 | DLXC | DELTA EXPRESS COURIERS INC | | | SCAC4 |
| 3145 | DLXI | DELTA LOGISTICS INC | | | SCAC4 |
| 3146 | DLXL | DLC TRANSPORT LLC | | | SCAC4 |
| 3147 | DLXM | DLUX MOVERS & STORAGE INC | | | SCAC4 |
| 3148 | DLXN | D & L AND SONS TRANSPORTATION INC | | | SCAC4 |
| 3149 | DLXO | DE LA TORRE TRANSPORT | | | SCAC4 |
| 3150 | DLXP | D L S TRANSPORT LLC | | | SCAC4 |
| 3151 | DLXT | DLS TRANSPORT | | | SCAC4 |
| 3152 | DLY | Air Independence GmbH | Callsign: Junior, ICAO callsign changed to Daily. ICAO designator changed from JTV | D | AVCODES |
| 3153 | DLY | Air Independence GmbH | Callsign: Daily, ICAO callsign changed from Junior. ICAO designator changed from JTV | D | AVCODES |
| 3154 | DLYC | DOODLE CREEK | | | SCAC4 |
| 3155 | DLYD | DRAGON LADY EXPRESS LTD | | | SCAC4 |
| 3156 | DLYG | DELANEY TECHNOLOGIES INC | | | SCAC4 |
| 3157 | DLYL | DALEY OIL | | | SCAC4 |
| 3158 | DLYP | DE LOYOLA TRANSPORTES | | | SCAC4 |
| 3159 | DLZ | DAVIDSON & LUMBER | | | PWRC |
| 3160 | DLZK | DLUZAK, INCORPORATED | | | SCAC1 |
| 3161 | DLZK | DLUZAK INCORPORATED | | | SCAC4 |
| 3162 | DM | Maersk Air A/S | ICAO: DAN, Callsign: Maerskair, IATA Prefix: 349, Merged into Sterling | DK | AVCODES |
| 3163 | DM | Maersk Air A/S | ICAO: DMA, Callsign: Maerskair, IATA Prefix: 349, ICAO designator changed to DAN | DK | AVCODES |
| 3164 | DM | Asian Air Company Limited | | T | AVCODES |
| 3165 | DM | Anda Air LLC | ICAO: SSV, Commenced operations on 22 October 2016. | UA | AVCODES |
| 3166 | DM | DW Dominican Wings. S.A. d/b/a Arajet | ICAO: DWI, | DOM | AVCODES |
| 3167 | DM | Lake State Ry. Co. | added 4/1992; 1/1994-7/2005 | | NAKINA |
| 3168 | DM | Detroit & Mackinac Ry. | 1/1975-1/1980; eliminated 4/1992 | | NAKINA |
| 3169 | DM | (D&M) Detroit & Mackinac Ry. | 7/1965-10/1966 | | NAKINA |
| 3170 | DM | (D&M) Detroit & Mackinac Ry. | 7/65-10/66 | | NRHS |
| 3171 | DM | Detroit & Mackinac Ry. | 1/75-1/80; eliminated 4/92 | | NRHS |
| 3172 | DM | Lake State Ry. Co. | added 4/92; 1/94-7/2000 | | NRHS |
| 3173 | DM | LAKE STATE RAILWAY CO. [DETROIT & MACKINAC RY] | | | PWRC |
| 3174 | DM | Lake State Railway | | | RSRV |
| 3175 | DM | DETROIT AND MACKINAC RAILWAY COMPAN | | | SCAC4 |
| 3176 | DM | Detroit & Mackinak Railroad | | USA | TRAFFIC |
| 3177 | DM&IR | DULUTH, MISSABE & IRON RANGE RWY | | | PWRC |
| 3178 | DM&N | Duluth, Missabe & Northern Ry. (Co.) | 7/1932-7/1954 | | NAKINA |
| 3179 | DM&N | Duluth, Missabe & Northern Ry. | 4/38-1/52 | | NRHS |
| 3180 | DM&N | DULUTH, MISSABE & NORTHERN RWY. CO. | | | PWRC |
| 3181 | DMA | Maersk Air A/S | IATA: DM, Callsign: Maerskair, IATA Prefix: 349, ICAO designator changed to DAN | DK | AVCODES |
| 3182 | DMAA | D & M TRUCKING | | | SCAC4 |
| 3183 | DMAB | DIAZ MARTINEZ, ABEL | | | SCAC4 |
| 3184 | DMAD | D & M TRANSPORT BROKERS INC | | | SCAC4 |
| 3185 | DMAE | DOMA EXPORT COMPANY INC | | | SCAC4 |
| 3186 | DMAF | D M LOGISTICS INC | | | SCAC4 |
| 3187 | DMAG | DENOMME, A L TRUCKING | | | SCAC4 |
| 3188 | DMAH | DMA TRANSPORT INC | | | SCAC4 |
| 3189 | DMAI | DUTCH MAID LOGISTICS INC | | | SCAC4 |
| 3190 | DMAJ | DMT | | | SCAC4 |
| 3191 | DMAK | DONS MAKIKI INC | | | SCAC4 |
| 3192 | DMAL | DANMAR LINES LTD | | | SCAC4 |
| 3193 | DMAP | DMM EXPRESS COMPANY | | | SCAC4 |
| 3194 | DMAT | D & M TRANSPORT INC | | | SCAC4 |
| 3195 | DMAU | D-MARE LTD | | GB | BIC |
| 3196 | DMAU | DMA-TRANS B V | | | SCAC4 |
| 3197 | DMAY | DECISION MAKER TRANSPORT LLC | | | SCAC4 |
| 3198 | DMB | Aerorental | Callsign: Aerorental, | PA | AVCODES |
| 3199 | DMBA | DON MIGUEL TRANSPORTES S DE RL DE | | | SCAC4 |
| 3200 | DMBB | DE MASTER TRUCKING INC | | | SCAC4 |
