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
HSA HSB HSC HSD HSE HSF HSG HSH HSI HSJ HSK HSL HSM HSN HSO HSP HSR HSS HST HSU HSV HSW HSX HSY HSZ
HSWK HSWS HSWX
1 HSWX Min-Ad, Inc. 4/1970; added 7/1970; eliminated 10/1970   NAKINA
2 HSWX Hercules Petroleum Co. 8/1920   NAKINA
3 HSWX Min-Ad, Inc. 4/70; added 7/70; eliminated 10/70   NRHS
4 HSWX *HERCULES PETROLEUM CO.     PWRC
5 HSWX *MIN-AD, INC.     PWRC