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
IOA IOB IOC IOE IOF IOI IOL IOM ION IOP IOR IOS IOT IOU IOX IOZ
IOPU IOPX IOPZ
1 IOPX MidAmerican Energy Co. added 4/1996; 7/2000-7/2005   NAKINA
2 IOPX Midwest Power Systems added 4/1993; 1/1994; eliminated 4/1996   NAKINA
3 IOPX Iowa Power & Light Co. added 4/1977; 1/1980; eliminated 4/1993   NAKINA
4 IOPX Iowa Power & Light Co. 1/80; eliminated 4/93   NRHS
5 IOPX Midwest Power Systems added 4/93; 1/94; eliminated 4/96   NRHS
6 IOPX MidAmerican Energy Co. added 4/96; 7/2000   NRHS
7 IOPX MIDAMERICAN ENERGY CO [MIDWEST POWER SYSTEMS; IOWA POWER & LIGHT]     PWRC
8 IOPX Iowa Power and Light (MidAmerican Energy)     RSRV