Real world company prefixes

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X1 X3 X4 X5 X6 X7 X8 X9 XA XB XC XD XE XF XG XH XI XJ XK XL XM XN XO XP XR XS XT XU XV XW XX XY XZ
XKA XKT XKX
1 XK Compagnie Aerienne Corse Mediterranee ICAO: CCM, Callsign: Corsica, IATA Prefix: 146, Name changed to CCM Airlines w.e.f. November 2000. IATA designator changed from ZN F AVCODES
2 XK Air Hawaii ICAO: HHH, Ceased operations USA AVCODES
3 XK Compagnie Aerienne Corse Mediterranee ICAO: CCM, Callsign: Corsica, IATA Prefix: 146, Name changed to Air Corsica w.e.f. October 2010. Name changed from Compagnie Aerienne Corse Mediterranee. IATA designator changed from ZN F AVCODES
4 XK Air Corsica ICAO: CCM, Callsign: Corsica, IATA Prefix: 146, Name changed from Compagnie Aerienne Corse Mediterranee w.e.f. October 2010. Name changed from Compagnie Aerienne Corse Mediterranee. IATA designator changed from ZN F AVCODES
5 XKA Kavouras, Inc.   USA AVCODES
6 XKA Kavouras Inc     ICAO1
7 XKTZ XTRA INCORPORATED [MISSOURI PACIFIC RAILROAD]     PWRC
8 XKTZ XTRA Inc.     RSRV
9 XKTZ RIC-XTRA INC     SCAC4
10 XKX ASECNA     ICAO1