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
P& P0 P1 P2 P3 P4 P5 P6 P7 P8 P9 PA PB PC PD PE PF PG PH PI PJ PK PL PM PN PO PP PQ PR PS PT PU PV PW PX PY PZ
PSA PSB PSC PSD PSE PSF PSG PSH PSI PSJ PSK PSL PSM PSN PSO PSP PSQ PSR PSS PST PSU PSV PSW PSX PSY PSZ
PSIA PSIB PSID PSIE PSIG PSIH PSII PSIK PSIM PSIN PSIO PSIP PSIQ PSIR PSIS PSIU PSIW PSIX PSIY
1 PSIX Duke Energy Indiana, Inc. added 4/2007; eliminated 4/2008   NAKINA
2 PSIX PSI Energy, Inc. added 1/1991; 1/1994-7/2005; eliminated 4/2007   NAKINA
3 PSIX Public Service Co. of Indiana, Inc. 4/1970; added 10/1970; 1/1975-1/1980; eliminated 1/1991   NAKINA
4 PSIX Commonwealth Edison Co. added 10/1954; 10/1957-7/1965; eliminated 10/1965   NAKINA
5 PSIX Public Service Co. of Northern Illinois 1/1950-7/1954; eliminated 10/1954   NAKINA
6 PSIX Public Service Co. of Northern Illinois Jan-52   NRHS
7 PSIX Commonwealth Edison Co. 10/57-7/65; eliminated 10/65   NRHS
8 PSIX Public Service Co. of Indiana, Inc. 4/70; added 10/70; 1/75-1/80; eliminated 1/91   NRHS
9 PSIX PSI Energy, Inc. added 1/91; 1/94-7/2000   NRHS
10 PSIX *COMMONWEALTH EDISON CO. [PUBLIC SERVICE CO OF NORTHERN ILLINOIS]     PWRC
11 PSIX +DUKE ENERGY INDIANA [PSI ENERGY, INC.; PUBLIC SERVICE CO. OF INDIANA]     PWRC
12 PSIX PSI Energy     RSRV
13 PSIX DUKE ENERGY INDIANA INC     SCAC4