| 1 | DCP | Delta Connection Limited | IATA: DQ, IATA Prefix: 521, Name changed to Air Direct Connect Limited. | EAK | AVCODES |
| 2 | DCPC | DIVERSIFIED CPC INTERNATIONAL INC | | | SCAC4 |
| 3 | DCPG | DALLAS CITY PACKING INC | | | SCAC4 |
| 4 | DCPI | DCP TRUCKING INC | | | SCAC4 |
| 5 | DCPN | D C P TRANSPORT | | | SCAC4 |
| 6 | DCPR | DELAPS COVE FISH PRODUCTS LTD | | | SCAC4 |
| 7 | DCPS | DCP SERVICES LTD | | | SCAC4 |
| 8 | DCPX | Dart Container Corp. of Pennsylvania | 1/1975; added 4/1975; 1/1980-1/1994; eliminated 4/2000; 7/2000-7/2005 (not listed) | | NAKINA |
| 9 | DCPX | Dacar Chemical Products Co. | 1/1952-7/1965; eliminated 7/1966 | | NAKINA |
| 10 | DCPX | De Soto Creamery & Produce Co. (North Western Refrigerator Line Co.) | 7/1935 | | NAKINA |
| 11 | DCPX | Dacar Chemical Products Co. | 1/52-7/65; eliminated 7/66 | | NRHS |
| 12 | DCPX | Dart Container Corp. of Pennsylvania | 1/75; added 4/75; 1/80-1/94; eliminated 4/2000; 7/2000 | | NRHS |
| 13 | DCPX | *DACAR CHEMICAL PRODUCTS CO. | | | PWRC |
| 14 | DCPX | +DART CONTAINER CORP | | | PWRC |
| 15 | DCPX | Dart Container Corporation of Pennsylvania | | | RSRV |
| 16 | DCPX | DART CONTAINER CORP | | | SCAC4 |
