| 1 | CCK | Flight Trac, Inc. | Callsign: Cable Check, | USA | AVCODES |
| 2 | CCK | Air Coral Coast Limited | Callsign: Air Coral, | FJI | AVCODES |
| 3 | CCK | Flight Trac | | | ICAO1 |
| 4 | CCK | Campbell's Creek R.R. Co. | 8/1920-4/1961 | | NAKINA |
| 5 | CCK | Campbell's Creek R.R. Co. | 7/23-4/61 | | NRHS |
| 6 | CCK | CAMBELL'S CREEK RR | | | PWRC |
| 7 | CCKA | CLASSIC CARTAGE TRUCKING CORPORATIO | | | SCAC3 |
| 8 | CCKA | CLASSIC CARTAGE TRUCKING CORPORATIO | | | SCAC4 |
| 9 | CCKC | CROSSROAD TRUKING INC | | | SCAC4 |
| 10 | CCKD | C & C TRUCKING OF DUNCAN INC | | | SCAC3 |
| 11 | CCKE | CROWN CORK & SEAL CO USA INC | | | SCAC4 |
| 12 | CCKG | C N C TRUCKING | | | SCAC3 |
| 13 | CCKH | COCKERHAM, MILO C CO INC | | | SCAC4 |
| 14 | CCKJ | C C K TRUCKING INC | | | SCAC4 |
| 15 | CCKK | CIRCLE C TRUCKING INC | | | SCAC3 |
| 16 | CCKK | CARTER TRUCKING CO | | | SCAC4 |
| 17 | CCKL | C C M TRUCKING | | | SCAC3 |
| 18 | CCKL | CEDAR CREEK LUMBER | | | SCAC4 |
| 19 | CCKM | COLLINS, CHUCK MOBILE HOME MOVER | | | SCAC3 |
| 20 | CCKN | CAL STATE TRUCKING CO INC | | | SCAC3 |
| 21 | CCKN | COLLETT TRUCKING INC | | | SCAC4 |
| 22 | CCKP | CARLSON, CHARLES TRUCKING | | | SCAC3 |
| 23 | CCKQ | CATHCART TRUCKING | | | SCAC3 |
| 24 | CCKQ | CONCORD TRUCKING SERVICES INC | | | SCAC4 |
| 25 | CCKR | CHECKER VAN & STORAGE OF OAKLAND, I | | | SCAC3 |
| 26 | CCKR | CLUCK CLUCK EXPRESS INC | | | SCAC4 |
| 27 | CCKS | C & C TRUCK LINE INC | | | SCAC3 |
| 28 | CCKT | CLASSIC CARTAGE INC | | | SCAC3 |
| 29 | CCKU | CENTRAL CONTAINER LTD | | H | BIC |
| 30 | CCKU | CECANA LINE | | | SCAC3 |
| 31 | CCKU | CECANA LINE | | | SCAC4 |
| 32 | CCKV | COW CREEK VALLEY TRANSPORT | | | SCAC3 |
| 33 | CCKV | C & C TRUCKING SERVICES | | | SCAC4 |
| 34 | CCKX | CCKX, Inc. | added 4/1986; 1/1994; eliminated 7/1999; 7/2000-7/2005 (not listed) | | NAKINA |
| 35 | CCKX | California Contemporary, Inc. | added 4/1962; 7/1965-1/1980; eliminated 4/1986 | | NAKINA |
| 36 | CCKX | Carthage Creamery Co. (Merchants Despatch, Inc.) | 7/1935 | | NAKINA |
| 37 | CCKX | Carthage Creamery Co. | 7/1932 | | NAKINA |
| 38 | CCKX | California Contemporary, Inc. | added 4/62; 7/65-1/80; eliminated 4/86 | | NRHS |
| 39 | CCKX | CCKX, Inc. | added 4/86; 1/94; eliminated 7/99; 7/2000 | | NRHS |
| 40 | CCKX | *CARTHAGE CREAMERY CO. | | | PWRC |
| 41 | CCKX | +CCKX INC. (CALIFORNIA CONTEMPORARY, INC.) | | | PWRC |
| 42 | CCKX | California Contemporary (CCKX) | | | RSRV |
| 43 | CCKX | CALIFORNIA CONTEMPORARY INC | | | SCAC3 |
| 44 | CCKX | CCKX INCORPORATED | | | SCAC4 |
| 45 | CCKY | Chattooga & Chickamauga Ry. Co. | added 1/1990; 1/1994-7/2000; eliminated 1/2004; 7/2005 | | NAKINA |
| 46 | CCKY | Chattooga & Chickamauga Ry. Co. | added 1/90; 1/94-7/2000 | | NRHS |
| 47 | CCKY | CHATTOOGA & CHICKAMAUGA RAILWAY COMPANY | | | PWRC |
| 48 | CCKY | Chattooga and Chickamauga Railway | | | RSRV |
| 49 | CCKY | CHATTOOGA & CHICKAMAUGA RAILWAY CO | | | SCAC3 |
| 50 | CCKY | Chattooga & Chickamauga | | USA | TRAFFIC |