| 1 | DPL | Dome Petroleum Ltd. | Callsign: Dome, | CDN | AVCODES |
| 2 | DPL | Dome Petroleum | | | ICAO1 |
| 3 | DPL | DELMARVA POWER & LIGHT | | | PWRC |
| 4 | DPLD | DEEPLAND EXPRESS | | | SCAC4 |
| 5 | DPLL | DOMINOS PIZZA LLC | | | SCAC4 |
| 6 | DPLN | DEPPE LINIE G M B H & CO | | | SCAC1 |
| 7 | DPLN | DEPPE LINIE GMBH & CO | | | SCAC4 |
| 8 | DPLS | DEPLOYED RESOURCES LLC | | | SCAC4 |
| 9 | DPLX | Davenport Cement Co. | added 1/1984; eliminated 4/1985 | | NAKINA |
| 10 | DPLX | Martin-Marietta Corp. | added 1/1979; 1/1980; eliminated 7/1983 | | NAKINA |
| 11 | DPLX | Martin-Marietta Cement, Division of Martin-Marietta Corp. | added 10/1972; 1/1975; eliminated 1/1979 | | NAKINA |
| 12 | DPLX | Dewey Portland Cement Co., Division of Martin-Marletta Corp. | added 1/1965; 7/1965-4/1970; eliminated 10/1972 | | NAKINA |
| 13 | DPLX | Dewey Portland Cement Co., Division of Martin-Marletta Corp. | added 1/65; 7/65-4/70; eliminated 10/72 | | NRHS |
| 14 | DPLX | Martin-Marietta Cement, Division of Martin-Marietta Corp. | added 10/72; 1/75; eliminated 1/79 | | NRHS |
| 15 | DPLX | Martin-Marietta Corp. | added 1/79; 1/80 | | NRHS |
| 16 | DPLX | Davenport Cement Co. | eliminated 4/85 | | NRHS |
| 17 | DPLX | DAVENPORT CEMENT CO.[MARTIN-MARIETTA CORP.; DEWEY PORTLAND CEMENT CO.] | | | PWRC |
| 18 | DPLX | Davenport Cement | | | RSRV |
