| Abbreviation | Definition |
|---|---|
| CL31 | Los Angeles Police Department District 07 Helistop, Los Angeles, California USA |
| CLD | Carlsbad, California USA |
| CLE | Cleveland - Hopkins International Airport, Cleveland, Ohio USA |
| CLG | Coalinga, California USA |
| CLH | Coolah, New South Wales, Australia |
| CLJ | Cluj, Romania |
| CLL | College Station, Texas USA |
| CLM | Port Angeles, Washington USA |
| CLN | Carolina, Ma, Brazil |
| CLO | Cali, Colombia |
| CLP | Clarks Point, Alaska USA |
| CLQ | Colima, Mexico |
| CLT | Charlotte, North Carolina USA |
| CLU | Columbus, Indiana USA |
| CLV | Caldas Novas, Go, Brazil |
| CLX | Clorinda, Fo, Argentina |
| CLY | Calvi, France |
| CLZ | Calabozo, Venezuela |
| CMA | Camarillo Airport, Camarillo, California USA |
| CMB | Colombo, Sri Lanka |