| Abbreviation | Definition |
|---|---|
| CJL | Chitral, Pakistan |
| CJS | Ciudad Juarez, Mexico |
| CJU | Cheju, Republic of Korea |
| CKB | Clarksburg, West Virginia USA |
| CKC | Cherkassy, Russia |
| CKD | Crooked Creek, Alaska USA |
| CKE | Clear Lake, California USA |
| CKG | Chongqing, Mainland China |
| CKH | Chokurdakh, Russia |
| CKI | Croker Island, Northern Territory, Australia |
| CKK | Cherokee, Arkansas USA |
| CKM | Clarksdale, Mississippi USA |
| CKN | Crookston, Minnesota USA |
| CKO | Cornelio Procopio, Para, Brazil |
| CKR | Crane Island, Washington USA |
| CKS | Carajas, Para, Brazil |
| CKV | Outlaw Field, Clarksville, Tennessee USA |
| CKX | Chicken, Alaska USA |
| CKY | Conakry, Guinea |
| CKZ | Canakkale, Turkey |