| 1 | CDKB | C & D TRUCKING | | | SCAC4 |
| 2 | CDKC | CALLENDER TRUCKING CO | | | SCAC4 |
| 3 | CDKD | COLE DECKARD INC | | | SCAC3 |
| 4 | CDKD | CRD TRUCKING | | | SCAC4 |
| 5 | CDKG | CALDERA TRUCKING | | | SCAC3 |
| 6 | CDKH | CONRAD TRUCKING INC | | | SCAC4 |
| 7 | CDKI | CARPET DOCKS LTD INC | | | SCAC3 |
| 8 | CDKI | CANDOCK INC | | | SCAC4 |
| 9 | CDKR | C & D TRUCKING | | | SCAC4 |
| 10 | CDKS | COMPASS-DOCKSIDE INC | | | SCAC3 |
| 11 | CDKT | CLAUD, T K TRUCKING INC | | | SCAC3 |
| 12 | CDKU | CONTAINERLAND DANMARK | | DK | BIC |
| 13 | CDKU | CONTAINERLAND DANMARK | | | SCAC4 |
| 14 | CDKV | CDK LOGISTICS SERVICES INC | | | SCAC4 |
| 15 | CDKW | CERBA DENIZCILIK A S | | | SCAC4 |
| 16 | CDKX | Royal Oak Charcoal Co., Northern Division | added 10/1968; eliminated 10/1969 | | NAKINA |
| 17 | CDKX | Cliffs Dow Chemical Co. | 7/1935-10/1966; eliminated 10/1968 | | NAKINA |
| 18 | CDKX | Cliffs Dow Chemical Co. | 4/38-10/66; eliminated 10/68 | | NRHS |
| 19 | CDKX | Royal Oak Charcoal Co., Northern Division | added 10/68; eliminated 10/69 | | NRHS |
| 20 | CDKX | *CLIFFS DOW CHEMICAL CO. | | | PWRC |
| 21 | CDKX | *ROYAL OAK CHARCOAL CO., NORTHERN DIV. | | | PWRC |
| 22 | CDKX | CLIFFS DOW CHEMICAL CO | | | SCAC3 |
| 23 | CDKY | CAIN, DARRELL TRUCKING LLC | | | SCAC4 |
