Real world company prefixes

0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M n O P Q R S T U V W X Y Z Ø
4A 4B 4C 4D 4E 4F 4G 4H 4I 4J 4K 4L 4M 4N 4O 4P 4Q 4R 4S 4T 4U 4V 4W 4X 4Y 4Z
1 4K Kenn Borek Air Ltd. ICAO: KBA, Callsign: Borek Air, Designator 4K recalled by IATA CDN AVCODES
2 4K Askari Aviation (Pvt) Ltd. ICAO: AAS, Callsign: Al-ass, Name changed from M/S Askari Aviation Serivces (Pvt) Ltd. PK AVCODES