| 1 | CDT | Real Aero Club de Reus-Costa Dorada | Callsign: Aeroreus, | E | AVCODES |
| 2 | CDT | Real Aero Club de Reus-Costa Dorado | | | ICAO1 |
| 3 | CDT | CONNECTICUT DEPARTMENT OF TRANSPORTATION | | | PWRC |
| 4 | CDT | CROSSROAD TOURS | | | SCAC4 |
| 5 | CDTA | CALIFORNIA DAME TRANSPORTATION INC | | | SCAC3 |
| 6 | CDTA | C & D FORREST TRANSPORT LLC | | | SCAC4 |
| 7 | CDTA | Capital District Transportation Authority | City: Albany (NY) | USA | TRAFFIC |
| 8 | CDTB | CORD TRANSPORTATION SERVICES INC | | | SCAC3 |
| 9 | CDTC | C & D TRANSPORTATION COMPANY | | | SCAC3 |
| 10 | CDTC | CANDOR TRANSPORTATION CO LLC | | | SCAC4 |
| 11 | CDTE | C D TRANSFER | | | SCAC3 |
| 12 | CDTE | CORDITE TRANSPORT LTD | | | SCAC4 |
| 13 | CDTF | CANDYS TORTILLA FACTORY INC | | | SCAC3 |
| 14 | CDTF | CANADIAN TUNA FISHERMAN | | | SCAC4 |
| 15 | CDTG | C & D TRUCKING INC | | | SCAC3 |
| 16 | CDTG | C & D | | | SCAC4 |
| 17 | CDTH | CHILDERS TRUCKING CO INC | | | SCAC3 |
| 18 | CDTI | C & D TRUCKING | | | SCAC3 |
| 19 | CDTI | CHEMICAL DISTRIBUTORS INC | | | SCAC4 |
| 20 | CDTJ | CHILDRES TRUCKING CO INC | | | SCAC3 |
| 21 | CDTJ | C & D TRANSPORTATION INC | | | SCAC4 |
| 22 | CDTK | C D TRUCKING & CRANE SERVICE | | | SCAC3 |
| 23 | CDTK | C D T TRUCKING | | | SCAC4 |
| 24 | CDTN | CW & D TRUCKING LLC | | | SCAC4 |
| 25 | CDTO | CONDOR TANK LINES | | | SCAC3 |
| 26 | CDTP | C & D TRANSPORTATION INC | | | SCAC3 |
| 27 | CDTP | COCHRANE, DAVID TRUCKING LLC | | | SCAC4 |
| 28 | CDTQ | CONSOLIDATED TRUCKING INC | | | SCAC3 |
| 29 | CDTQ | CIMCO DIVISION TOROMONT INDUSTRIES | | | SCAC4 |
| 30 | CDTR | COATS, DWIGHT F TRUCKING | | | SCAC3 |
| 31 | CDTR | C & D TRUCKING | | | SCAC4 |
| 32 | CDTS | CEDAR LAKE TRANSPORTATION INC | | | SCAC3 |
| 33 | CDTS | C & D TRANSPORT LIMITED | | | SCAC4 |
| 34 | CDTT | CONCORD TRANSPORTATION INC | | | SCAC3 |
| 35 | CDTT | CONCORD TRANSPORTATION INC | | | SCAC4 |
| 36 | CDTU | CONTAINER COMMERCIO E INDUSTRIA | | | SCAC3 |
| 37 | CDTV | CONARD TRANSPORT | | | SCAC3 |
| 38 | CDTV | CORRADINA TRANSPORTATION SERVICES L | | | SCAC4 |
| 39 | CDTW | C & D TRUCKING | | | SCAC3 |
| 40 | CDTX | California Dept. of Transportation | 1/1994-7/2005 (not listed) | | NAKINA |
| 41 | CDTX | California Dept. of Transportation | 1/94-7/2000 | | NRHS |
| 42 | CDTX | CALIFORNIA DEPT. OF TRANSP.(AMTRAK CALIFORNIA) | | | PWRC |
| 43 | CDTX | California Department of Transportation (Amtrak California) | | | RSRV |
| 44 | CDTX | CALIFORNIA DEPT OF TRANSP (COMMUTER | | | SCAC4 |
| 45 | CDTX | California Department of Transportation (Caltrain) | | USA | TRAFFIC |
| 46 | CDTY | COMMODITY TRANSIT INC | | | SCAC3 |
| 47 | CDTY | COMMODITY HAULERS EXPRESS INC | | | SCAC4 |
