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
ISRC ISRD ISRL ISRN ISRP ISRR ISRT ISRU
1 ISRR Indiana Southern R.R. Co., Inc. added 10/1992; eliminated 10/1993; 1/1994 (not listed); added 7/1996; 7/2000-7/2005; eliminated 1/2008   NAKINA
2 ISRR Indiana Southern R.R. Co., Inc. added 10/92; eliminated 10/93; 1/94; added 7/96; 7/2000   NRHS
3 ISRR INDIANA SOUTHERN RAILROAD CO.     PWRC
4 ISRR Indiana Southern Railroad     RSRV
5 ISRR INDIANA SOUTHERN RAILROAD COMPANY I     SCAC4
6 ISRR Indiana Southern Railroad   USA TRAFFIC