| 1 | CAD | Chilliwack Aviation Ltd. | Callsign: Chilliwackair, | CDN | AVCODES |
| 2 | CAD | PT Cardig Air | IATA: 8F, Callsign: Cardig Air, IATA Prefix: 690, Designator 8F* recalled by IATA. | RI | AVCODES |
| 3 | CAD | PT Cardig Air | Callsign: Cardig Air, Designator 8F* recalled by IATA. | RI | AVCODES |
| 4 | CAD | Chilliwack Aviation | | | ICAO1 |
| 5 | CAD | Cadiz R.R. Co. | 1/1975; added 4/1977; 1/1980; eliminated 1/1989; eliminated 4/1989 | | NAKINA |
| 6 | CAD | Cadiz R.R. Co. | 1/75-1/80; eliminated 1/89; eliminated 4/89 | | NRHS |
| 7 | CAD | CADIZ RAILROAD | | | PWRC |
| 8 | CAD | Cadiz Railroad | | | RSRV |
| 9 | CAD | Cadiz Railroad | | USA | TRAFFIC |
| 10 | CADA | CAD MARKETING INC | | | SCAC3 |
| 11 | CADA | CAD TRANSPORTATION INC | | | SCAC4 |
| 12 | CADB | CANDLEBROOK DELIVERY SERVICE INC | | | SCAC3 |
| 13 | CADC | CARDINAL VAN & STORAGE INC | | | SCAC3 |
| 14 | CADD | CADDELL TRANSIT CORPORATION | | | SCAC3 |
| 15 | CADF | CALIFORNIA FREIGHT CONNECTION | | | SCAC3 |
| 16 | CADG | CAMPBELL, DONALD G | | | SCAC3 |
| 17 | CADH | CALEDONIA HAULERS LLC | | | SCAC4 |
| 18 | CADI | CARRIER DELIVERY SERVICE INC | | | SCAC3 |
| 19 | CADK | CARDELLA TRUCKING INC | | | SCAC3 |
| 20 | CADL | CANA-DATUM MOULDS LTD | | | SCAC4 |
| 21 | CADM | CADDO MOVING & STORAGE | | | SCAC3 |
| 22 | CADM | CARSON, D M AND SONS INC | | | SCAC4 |
| 23 | CADN | CADDENS MOVING & STORAGE | | | SCAC3 |
| 24 | CADO | C & D DRAYAGE | | | SCAC3 |
| 25 | CADO | CANAM CIRCUIT BREAKERS SERVICES INC | | | SCAC4 |
| 26 | CADP | CALIFORNIA DISPATCH INC. | | | SCAC3 |
| 27 | CADQ | CARLOAD DELIVERY SERVICE | | | SCAC3 |
| 28 | CADQ | CARON & CARON TRUCKING | | | SCAC4 |
| 29 | CADS | CAROLINA ASSEMBLY AND DISTRIBUTION | | | SCAC3 |
| 30 | CADS | CALIFORNIA DELIVERY SERVICE INC | | | SCAC4 |
| 31 | CADU | MAERSK A/S | | DK | BIC |
| 32 | CADU | CALMEDIA LINE S.P.A. | | | SCAC3 |
| 33 | CADU | COSTA CONTAINER LINES SPA | | | SCAC4 |
| 34 | CADU | Carl Dume Ingenierbau GmbH + Co. KG | | DE | VKM |
| 35 | CADV | CAMPBELL TRUCK LINE | | | SCAC3 |
| 36 | CADW | CHILDS, ARTHUR M JR & DOROTHY | | | SCAC3 |
| 37 | CADX | CAN DO, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 38 | CADX | C.E. Cadieux | 7/1935-1/1941 | | NAKINA |
| 39 | CADX | Cadillac Tank Car Co. | 4/1947-4/1970; eliminated 4/1971 | | NAKINA |
| 40 | CADX | C.E. Cadieux | Apr-38 | | NRHS |
| 41 | CADX | Cadillac Tank Car Co. | 1/52-4/70; eliminated 4/71 | | NRHS |
| 42 | CADX | CAN DO, Inc. | Jul-00 | | NRHS |
| 43 | CADX | *CADILLAC TANK CAR CO. | | | PWRC |
| 44 | CADX | +CAN DO INC. | | | PWRC |
| 45 | CADX | Cando Corporation | | | RSRV |
| 46 | CADX | Cando Corporation | | | RSRV |
| 47 | CADX | CADILLAC TANK CAR CO | | | SCAC3 |
| 48 | CADX | CAN DO INC | | | SCAC4 |
| 49 | CADY | CALIFORNIA DELIVERY SERVICE | | | SCAC3 |
