| 1 | KAC | Kuwait Airways | IATA: KU, Callsign: Kuwaiti, IATA Prefix: 229, ICAO designator changed from Kilo Uniform. | KWT | AVCODES |
| 2 | KAC | Kuwait Airways | IATA: KU, Callsign: Kilo Uniform, IATA Prefix: 229, ICAO designator changed to Kuwaiti | KWT | AVCODES |
| 3 | KAC | Kuwait Airways | IATA: KU | | ICAO1 |
| 4 | KAC | Kuwait Airways | | KWT | TRAFFIC |
| 5 | KACA | A-KALALA TRANSPORT LTD | | | SCAC4 |
| 6 | KACE | KATH, CARL E JR | | | SCAC3 |
| 7 | KACF | K & C FREIGHTWAYS INC | | | SCAC3 |
| 8 | KACG | K & C GRAIN | | | SCAC3 |
| 9 | KACH | KAISER CHEMICALS | | | PWRC |
| 10 | KACH | KACHINA TRANSPORTATION | | | SCAC3 |
| 11 | KACH | KACHAN, RANDY | | | SCAC4 |
| 12 | KACI | KARON CARRIER INC | | | SCAC3 |
| 13 | KACL | KACE LOGISTICS INC | | | SCAC4 |
| 14 | KACN | KANSAS AIR CENTER INC | | | SCAC4 |
| 15 | KACR | KACH TRANSPORTATION | | | SCAC3 |
| 16 | KACR | KACH TRANSPORTATION INC | | | SCAC4 |
| 17 | KACT | K & C TRUCKING CO INC | | | SCAC3 |
| 18 | KACT | K & C TRUCKING CO INC | | | SCAC4 |
| 19 | KACU | CASPIAN CONTAINER LINE LLC | | | SCAC4 |
| 20 | KACV | KACHARAVA SHIPPING COMPANY LTD | | | SCAC3 |
| 21 | KACV | K T TRANSPORTATION | | | SCAC4 |
| 22 | KACX | Kaiser Aluminum & Chemical Corp. | added 4/1959; 4/1961-1/1994; eliminated 7/1994; 7/2000-7/2005 (not listed) | | NAKINA |
| 23 | KACX | Kaiser Aluminum & Chemical Corp. | 4/61-1/94; eliminated 7/94; 7/2000 | | NRHS |
| 24 | KACX | KAISER ALUMINUM & CHEMICAL CORP. | | | PWRC |
| 25 | KACX | Kaiser Aluminum and Chemical Corporation | | | RSRV |
| 26 | KACX | KAISER ALUMINUM & CHEMICAL CORP | | | SCAC3 |
| 27 | KACX | KAISER ALUMINUM & CHEMICAL CORP | | | SCAC4 |
| 28 | KACY | KELLER, ALLEN COMPANY | | | SCAC4 |
