| 1 | DDDB | D & D DISTRIBUTION | | | SCAC4 |
| 2 | DDDC | DUCAN PRODUCTS INC | | | SCAC4 |
| 3 | DDDE | DEDICATED DEPENDABLE LOGISTICS | | | SCAC4 |
| 4 | DDDI | DELAVAL DIRECT DISTRIBUTION | | | SCAC4 |
| 5 | DDDN | DEDICATED TRANSPORTATION, INC | | | SCAC1 |
| 6 | DDDT | DDD TRANSPORTATION LLC | | | SCAC4 |
| 7 | DDDU | WNG CONTAINER SERVICE CO LIMITED | | PRC | BIC |
| 8 | DDDV | DEDICATED DISTRIBUTION SERVICES INC | | | SCAC4 |
| 9 | DDDX | Frontier Cooperative Co. | added 4/1991; eliminated 10/1992; 1/1994-7/2005 (not listed) | | NAKINA |
| 10 | DDDX | Frontier Cooperative Co. | added 4/91; eliminated 10/92; 1/94-7/2000 | | NRHS |
| 11 | DDDX | FRONTIER COOPERATIVE COMPANY [RETIRED 11-30-92 ATP] | | | PWRC |
| 12 | DDDX | Frontier Cooperative | | | RSRV |
| 13 | DDDY | DAILY DIRECT DELIVERY | | | SCAC4 |
