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
HECC HECD HECE HECG HECL HECM HECN HECQ HECR HECT HECW HECX HECY
1 HECX Hoosier Energy REC, Inc. added 10/1981; 1/1994-7/2005; eliminated 4/2009   NAKINA
2 HECX H.E. Clark 7/1923-7/1935   NAKINA
3 HECX Hoosier Energy REC, Inc. added 10/81; 1/94-7/2000   NRHS
4 HECX *H.E. CLARK     PWRC
5 HECX +HOOSIER ENERGY REC, INC.     PWRC
6 HECX Hoosier Energy REC     RSRV
7 HECX HOOSIER ENERGY REC, INC.     SCAC4