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
I& I2 I3 I4 I5 I6 I7 I8 I9 IA IB IC ID IE IF IG IH II IJ IK IL IM IN IO IP IQ IR IS IT IU IV IW IX IY IZ
ISA ISB ISC ISD ISE ISF ISG ISH ISI ISK ISL ISM ISN ISO ISP ISR ISS IST ISU ISV ISW ISX ISY
ISNC ISNO ISNS
1 ISN Interisland Airlines Callsign: Tri-Bird, AOC revoked on 23 April 2010. RP AVCODES
2 ISN Interisland Airlines     ICAO1
3 ISN Iowa Southern Utilities Co. 4/1938   NAKINA
4 ISN Iowa Southern Utilities Co. Apr-38   NRHS
5 ISN IOWA SOUTHERN UTILITIES CO.     PWRC
6 ISNC I L S INC     SCAC4
7 ISNO ISON OIL COMPANY LLC     SCAC4
8 ISNS IASON SHIPPING LIMITED     SCAC4