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
HEA HEB HEC HED HEE HEF HEG HEH HEI HEJ HEK HEL HEM HEN HEO HEP HEQ HER HES HET HEV HEW HEX HEY HEZ
HEAA HEAB HEAC HEAD HEAG HEAH HEAI HEAO HEAP HEAQ HEAR HEAX HEAY
1 HEAY HEALDTON OIL CO INC     SCAC4