| 1 | CDA | Aerocardal | Callsign: Cardal, ICAO callsign changed to Aerocardal | RCH | AVCODES |
| 2 | CDA | Aerocardal | Callsign: Aerocardal, ICAO callsign changed from Cardal | RCH | AVCODES |
| 3 | CDA | Aerocardal | | | ICAO1 |
| 4 | CDA | Central de Aragon | | E | TRAFFIC |
| 5 | CDAA | CHIMEX TRUCKING AND TRADING INC | | | SCAC4 |
| 6 | CDAA | Aerocardal | Real: CDA | RCH | TRAFFIC |
| 7 | CDAB | CONSOLIDATED BUS CO INC | | | SCAC3 |
| 8 | CDAB | COLLECTIONS DABA-DOO INC | | | SCAC4 |
| 9 | CDAC | Bangor and Aroostook Rd. Co. | added 4/2001; eliminated 4/2002; 7/2005 | | NAKINA |
| 10 | CDAC | Canadian American R.R. Co. | added 4/1995; 7/2000; eliminated 4/2001 | | NAKINA |
| 11 | CDAC | Canadian American R.R. Co. | added 4/95; 7/2000; eliminated 4/2001 | | NRHS |
| 12 | CDAC | Bangor and Aroostook Rd. Co. | added 4/2001 | | NRHS |
| 13 | CDAC | BANGOR & AROOSTOOK RAILROAD (MONTREAL, MAINE & ATLANTIC RWY) [CANADIAN AMERICAN RAILROAD] | | | PWRC |
| 14 | CDAC | Canadian American Railroad (Montreal, Maine and Atlantic) | | | RSRV |
| 15 | CDAC | Canadian American Railroad | | CDN | TRAFFIC |
| 16 | CDAD | COUER D ALENE DELIVERY SERVICE | | | SCAC3 |
| 17 | CDAE | COMPAGNIE D' AFFRETEMENT ET DE TRAN | | | SCAC3 |
| 18 | CDAE | COTTONWOOD CREEK INC | | | SCAC4 |
| 19 | CDAF | CAN-AMERICA DRILLING INC | | | SCAC4 |
| 20 | CDAG | CANADIAN-GULF LINE LIMITED | | | SCAC3 |
| 21 | CDAH | CARDONA TRUCKING INC | | | SCAC3 |
| 22 | CDAI | CUNHA DRAYING | | | SCAC3 |
| 23 | CDAJ | CANADA-JET TRANSPORTATION | | | SCAC3 |
| 24 | CDAK | COLORADO ATLANTIC ENTERPRISES INC | | | SCAC3 |
| 25 | CDAM | CANADIAN AMERICAN TRANSPORTATION C | | | SCAC3 |
| 26 | CDAM | CANADIAN AMERICAN TRANSPORTATION C | | | SCAC4 |
| 27 | CDAN | COORDINATED DELIVERY & INSTALLATION | | | SCAC3 |
| 28 | CDAN | COASTAL DANCE RAGE | | | SCAC4 |
| 29 | CDAP | CDC TRANSPORT LLC | | | SCAC4 |
| 30 | CDAQ | CONDA, WESLEY D INC | | | SCAC3 |
| 31 | CDAQ | CELLAR DOOR ANTIQUES | | | SCAC4 |
| 32 | CDAS | CATE, DICK & SONS TRUCKING CO | | | SCAC3 |
| 33 | CDAS | CANADA DAWN LTD | | | SCAC4 |
| 34 | CDAT | CONTINENTAL TRANSPORTATION AND DIST | | | SCAC4 |
| 35 | CDAU | CANADIAN TIRE CORPORATION | | | PWRC |
| 36 | CDAU | Canadian Tire Corporation Ltd. | | | RSRV |
| 37 | CDAV | CANTRELL, DAVE, TRUCKING | | | SCAC3 |
| 38 | CDAV | CANTRELL, DAVE TRUCKING | | | SCAC4 |
| 39 | CDAW | CASCADE DRAYAGE AND WAREHOUSING, INC | | | SCAC3 |
| 40 | CDAY | COOK DRYWALL AND ACOUSTICAL SUPPLY | | | SCAC4 |
| 41 | CDAZ | CANADIAN TIRE CORPORATION | | | PWRC |
| 42 | CDAZ | Canadian Tire Corporation Ltd. | | | RSRV |
| 43 | CDAZ | CANADIAN TIRE CORPORATION LIMITED | | | SCAC4 |