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
H& H0 H1 H2 H3 H4 H5 H6 H7 H8 H9 HA HB HC HD HE HF HG HH HI HJ HK HL HM HN HO HP HQ HR HS HT HU HV HW HX HY HZ
HLA HLB HLC HLD HLE HLF HLG HLH HLI HLJ HLK HLL HLM HLN HLO HLP HLQ HLR HLS HLT HLU HLV HLW HLX HLY HLZ
HLPA HLPG HLPL HLPX HLPY HLPZ
1 HLPX Otter Tail Power Co. added 1/2005; 7/2005   NAKINA
2 HLPX Houston Lighting & Power Co. 1/1950-1/1980; eliminated 5/1983   NAKINA
3 HLPX Houston Lighting & Power Co. 1/52-1/80; eliminated 5/83   NRHS
4 HLPX *HOUSTON LIGHTING & POWER CO.     PWRC
5 HLPX +OTTER TAIL POWER CO.     PWRC
6 HLPX Houston Lighting and Power     RSRV
7 HLPX OTTER TAIL POWER CO     SCAC4