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
HCA HCB HCC HCD HCE HCF HCG HCH HCI HCJ HCK HCL HCM HCN HCO HCP HCQ HCR HCS HCT HCV HCW HCX HCY HCZ
HCTA HCTB HCTC HCTD HCTG HCTI HCTM HCTO HCTR HCTT HCTU HCTV HCTX
1 HCTX Martin Marietta Corp. added 4/1990; 1/1994; eliminated 7/1996; 7/2000 (not listed)   NAKINA
2 HCTX Hallett Construction Co. added 4/1971; 1/1975-1/1980; eliminated 4/1990   NAKINA
3 HCTX Hallett Construction Co. added 4/71; 1/75-1/80; eliminated 4/90   NRHS
4 HCTX Martin Marietta Corp. added 4/90; 1/94; eliminated 7/96; 7/2000   NRHS
5 HCTX *HALLETT CONSTRUCTION CO.     PWRC
6 HCTX *(MMAX) MARTIN MARIETTA CORPORATION     PWRC
7 HCTX Hallett Construction (Martin Marietta Corporation)     RSRV