| 1 | CKC | CKC Services, Inc. | | USA | AVCODES |
| 2 | CKC | CKC Services | | | ICAO1 |
| 3 | CKCA | COOK CARTAGE | | | SCAC3 |
| 4 | CKCB | CURRY, KEN CONSTRUCTION INC | | | SCAC4 |
| 5 | CKCC | COOK, CLYDE C | | | SCAC3 |
| 6 | CKCD | COOK, C D | | | SCAC3 |
| 7 | CKCE | COOKSON CARRIERS CORPORATION | | | SCAC3 |
| 8 | CKCF | CHICAGO KANSAS CITY FREIGHT LINES | | | PWRC |
| 9 | CKCF | CHARNOCK, CHARLES F AND SON | | | SCAC3 |
| 10 | CKCF | CKC FREIGHT LINE LLC | | | SCAC4 |
| 11 | CKCG | CLARK CARTAGE CO INC | | | SCAC3 |
| 12 | CKCG | COOK LOGISTICS LLC | | | SCAC4 |
| 13 | CKCH | COAKLEY, C H & CO INC | | | SCAC3 |
| 14 | CKCI | CLARK, C R TRUCKMEN INC | | | SCAC3 |
| 15 | CKCJ | COLLINS TRUCKING COMPANY INC | | | SCAC4 |
| 16 | CKCK | CLARK, CHAS TRUCKING | | | SCAC3 |
| 17 | CKCL | CLARK, CLEVELAND JR | | | SCAC3 |
| 18 | CKCM | COOKS CARRIERS INC | | | SCAC3 |
| 19 | CKCN | C K C INC | | | SCAC3 |
| 20 | CKCN | CKC SERVICES INC | | | SCAC4 |
| 21 | CKCO | C.K. MARITIME | | | SCAC3 |
| 22 | CKCP | CLARKE CORP | | | SCAC3 |
| 23 | CKCQ | CROCKER, CHRISTOPHER SCOTT | | | SCAC4 |
| 24 | CKCR | COOKS CRATING INC | | | SCAC3 |
| 25 | CKCR | CK COURIER | | | SCAC4 |
| 26 | CKCU | SOLSINO LTD | | HK | BIC |
| 27 | CKCV | CHEROKEE COURIER SERVICES INC | | | SCAC3 |
| 28 | CKCW | CHUCKS CARTAGE | | | SCAC3 |
| 29 | CKCY | COOK COUNTY SCHOOL BUS INC | | | SCAC3 |
| 30 | CKCY | CONCEPT TANKER CORPORATION | | | SCAC4 |
