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 HLPZ HOUSTON LIGHTING & POWER CO.     PWRC