| 1 | DLC | Ruili Jingcheng Helicopters Co., Ltd. | Callsign: Soarcopter, | PRC | AVCODES |
| 2 | DLC | Drummond Lighterage | 1/1975-7/2005 | | NAKINA |
| 3 | DLC | Drummond Lighterage | 1/75-7/2000 | | NRHS |
| 4 | DLC | Dillen & Le Jeune Cargo NV | Antwerpen | D | privat-bahn.de |
| 5 | DLC | *DUQUESNE LIGHT CO. | | | PWRC |
| 6 | DLC | +DRUMMOND LIGHTERAGE | | | PWRC |
| 7 | DLC | Drummond Lighterage | | | RSRV |
| 8 | DLC | Dampflokiclub Herisau | | CH | VKM |
| 9 | DLCC | D & L CARGO INC | | | SCAC4 |
| 10 | DLCD | DOMINO LOGISTICS CO | | | SCAC4 |
| 11 | DLCI | DELCO TRANSPORT INC | | | SCAC4 |
| 12 | DLCK | DOLECKI TRANSPORT | | | SCAC4 |
| 13 | DLCM | DELONG COMPANY INC, THE | | | SCAC4 |
| 14 | DLCN | D AND L CARRIERS INC | | | SCAC4 |
| 15 | DLCP | DELTA LOGISTICS TRANSPORTATION INC | | | SCAC4 |
| 16 | DLCR | DELAWARE COAST LINE RAILROAD | | | PWRC |
| 17 | DLCR | Delaware Coast Line Railroad | | | RSRV |
| 18 | DLCR | D L C TRANSPORT INC | | | SCAC4 |
| 19 | DLCS | DOLEC CONSULTANTS INC | | | SCAC4 |
| 20 | DLCT | DELCO ENTERPRISES LTD | | | SCAC4 |
| 21 | DLCX | Dearborn Leasing Co. | added 7/1964; 7/1965-1/1980; eliminated 7/1982 | | NAKINA |
| 22 | DLCX | David Levi & Co. | 7/1932-4/1938 | | NAKINA |
| 23 | DLCX | David Levi & Co. (Mather Stock Car Co.) | Apr-38 | | NRHS |
| 24 | DLCX | Dearborn Leasing Co. | added 7/64; 7/65-1/80; eliminated 7/82 | | NRHS |
| 25 | DLCX | *DAVID LEVI & CO. | | | PWRC |
| 26 | DLCX | *DEARBORN LEASING CO. | | | PWRC |
| 27 | DLCX | *WASTE MANAGEMENT, INC. | | | PWRC |
| 28 | DLCX | Dearborn Leasing Co. (Waste Management) | | | RSRV |
| 29 | DLCX | DIESEL LOCOMOTIVE CO LLC | | | SCAC4 |
| 30 | DLCY | DERSTINE LEASING COMPANY | | | SCAC4 |
