| 1 | KCR | Kolob Canyons Air Services | Callsign: Kolob, | USA | AVCODES |
| 2 | KCR | Kowloon-Canton Railway | City: Hong Kong | HK | TRAFFIC |
| 3 | KCR | KUBE CON rail GmbH | | DE | VKM |
| 4 | KCRC | K C RECYCLING LLC | | | SCAC4 |
| 5 | KCRG | KCR TRUCKING INC | | | SCAC4 |
| 6 | KCRS | KOWSKY, CHARLES RESOURCES INC | | | SCAC3 |
| 7 | KCRT | K-C REFRIGERATION TRANSPORT COMPANY | | | SCAC3 |
| 8 | KCRX | Kootenay Central Rail Services Ltd. | 7/2000-7/2005 (not listed) | | NAKINA |
| 9 | KCRX | Kansas City Refining Co. | 8/1920 | | NAKINA |
| 10 | KCRX | Kootenay Central Rail Services Ltd. | Jul-00 | | NRHS |
| 11 | KCRX | *KANSAS CITY REFINING CO. | | | PWRC |
| 12 | KCRX | +KOOTENAY CENTRAL RAIL SERVICES | | | PWRC |
| 13 | KCRX | Kootenay Central Rail Services | | | RSRV |
| 14 | KCRX | KOOTENAY CENTRAL RAIL SERVICES LTD | | | SCAC4 |
| 15 | KCRY | KENTUCKY CENTRAL RAILWAY | | | PWRC |
