| 1 | CKS | Kalitta Air LLC | IATA: CB, Callsign: Connie, IATA designator changed to K4. Name changed from Kitty Hawk International, Inc. d/b/a American International Airways | USA | AVCODES |
| 2 | CKS | American International Airways, Inc. | IATA: CB, Callsign: Connie, | USA | AVCODES |
| 3 | CKS | Kitty Hawk International, Inc. | IATA: CB, Callsign: Connie, | USA | AVCODES |
| 4 | CKS | Kitty Hawk International, Inc. d/b/a American International Airways | IATA: CB, Callsign: Connie, Name changed to Kalitta Air LLC | USA | AVCODES |
| 5 | CKS | Kalitta Air LLC | IATA: K4, Callsign: Connie, IATA designator changed from CB*. Name changed from Kitty Hawk International, Inc. d/b/a American International Airways | USA | AVCODES |
| 6 | CKS | Connie Kalitta Services, Inc. | Callsign: Connie, | USA | AVCODES |
| 7 | CKS | Kalitta Air | IATA: K4 | | ICAO1 |
| 8 | CKSB | C & K TRANSPORTATION | | | SCAC4 |
| 9 | CKSC | CLACKAMAS SERVICE CORP | | | SCAC3 |
| 10 | CKSC | CLIK-CLIK SYSTEMS INC | | | SCAC4 |
| 11 | CKSD | CREEKSIDE CARRIERS | | | SCAC4 |
| 12 | CKSE | CRACK-SEALING INC | | | SCAC4 |
| 13 | CKSF | CK SHADOW ENTERPRISES LLC | | | SCAC4 |
| 14 | CKSG | COOKS TRANSFER & STORAGE CO INC | | | SCAC3 |
| 15 | CKSH | CHEROKEE SHIPPING CORP OF MONROVIA | | | SCAC3 |
| 16 | CKSI | Carthage, Knightstown & Shirley R.R. Inc. | added 1/1989; eliminated 10/1989; 1/1994-7/2005 | | NAKINA |
| 17 | CKSI | Carthage, Knightstown & Shirley R.R. Inc. | added 1/89; eliminated 10/89; 1/94-7/2000 | | NRHS |
| 18 | CKSI | CARTHAGE, KNIGHTSTOWN & SHIRLEY RAILROAD | | | PWRC |
| 19 | CKSI | Carthage Knightstown and Shirley Railroad | | | RSRV |
| 20 | CKSI | CARTHAGE KNIGHTSTOWN & SHIRLEY RAIL | | | SCAC3 |
| 21 | CKSI | CARTHAGE KNIGHTSTOWN & SHIRLEY RAIL | | | SCAC4 |
| 22 | CKSJ | CLARK, STANLEY J INC | | | SCAC3 |
| 23 | CKSK | CLARKS TRUCKING | | | SCAC3 |
| 24 | CKSL | CHEEK SKYLINE LOGGING INC | | | SCAC3 |
| 25 | CKSM | CRANKSHAFT MACHINE CO | | | SCAC3 |
| 26 | CKSM | CLARKSVILLE SOD FARMS INC | | | SCAC4 |
| 27 | CKSN | COOKS TANK LINE INC | | | SCAC3 |
| 28 | CKSO | Condon, Kinzua & Southern R.R. Co. | 1/1975; eliminated 10/1977 | | NAKINA |
| 29 | CKSO | Condon, Kinzua & Southern R.R. Co. | Jan-75 | | NRHS |
| 30 | CKSO | CONDON, KINZUA & SOUTHERN RAILROAD CO. | | | PWRC |
| 31 | CKSO | CORDON KINZUA & SOUTHERN | | | SCAC3 |
| 32 | CKSP | COOK TRANSPORTATION | | | SCAC3 |
| 33 | CKSQ | COOKS TERMINAL WAREHOUSE | | | SCAC3 |
| 34 | CKSQ | CUSTOMS BROKERS SUPPLY INC | | | SCAC4 |
| 35 | CKSR | COOKS TRANSPORTATION | | | SCAC3 |
| 36 | CKSS | CLARK, R D & SONS | | | SCAC4 |
| 37 | CKST | CASKET DISTRIBUTORS INC | | | SCAC3 |
| 38 | CKSU | CK LINE CO LTD | | ROK | BIC |
| 39 | CKSU | STB H20 | | | SCAC4 |
| 40 | CKSW | CHICKASAW CONTAINER SRVICES INC | | | SCAC3 |
| 41 | CKSX | Clare K. Sullivan | 1/1943 (not listed) | | NAKINA |
| 42 | CKSX | CLARE K. SULLIVAN | | | PWRC |
| 43 | CKSY | COOKSEY OIL CO INC | | | SCAC4 |
