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
XLA XLB XLD XLE XLF XLG XLI XLJ XLK XLL XLM XLO XLR XLS XLT
1 XLA Excel Airways IATA: JN, Callsign: Expo, IATA Prefix: 812, Name changed to XL Airways UK Limited w.e.f. 23 November 2006. Name changed from Sabre Airways Ltd w.e.f. 01 November 2000. ICAO designator changed from SBE. ICAO callsign changed from Sabre GB AVCODES
2 XLA XL Airways UK Limited IATA: JN, Callsign: Expo, IATA Prefix: 812, Ceased operations on 12 September 2008. Name changed from Excel Airways w.e.f. 30 November 2006. Name changed from Sabre Airways Ltd w.e.f. 01 November 2000. ICAO designator changed from SBE. ICAO callsign changed from Sabre GB AVCODES
3 XLA Excel Airways IATA: JN   ICAO1