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
T& T- T0 T1 T2 T3 T4 T5 T6 T7 T8 T9 TA TB TC TD TE TF TG TH TI TJ TK TL TM TN TO TP TQ TR TS TT TU TV TW TX TY TZ
TP& TP1 TP2 TPA TPB TPC TPD TPE TPF TPG TPH TPI TPJ TPK TPL TPM TPN TPO TPP TPQ TPR TPS TPT TPU TPV TPW TPX TPY TPZ
TPRC TPRD TPRF TPRI TPRJ TPRL TPRP TPRQ TPRR TPRS TPRT TPRX TPRY
1 TPRX Texas Power & Light Co. 1/1950-10/1957; eliminated 1/1958; added 7/1980; eliminated 10/1985; 1/1994 (not listed)   NAKINA
2 TPRX Texas Power & Light Co. 1/52-10/57; eliminated 1/58; added 7/80; 1/94   NRHS
3 TPRX TEXAS POWER & LIGHT COMPANY     PWRC
4 TPRX Texas Power and Light     RSRV