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
HRA HRB HRC HRD HRE HRF HRG HRH HRI HRJ HRK HRL HRM HRN HRO HRP HRQ HRR HRS HRT HRU HRV HRW HRX HRY HRZ
HRDD HRDE HRDF HRDH HRDK HRDL HRDM HRDN HRDR HRDV HRDX
1 HRDX Silver Star Enterprises, Inc. added 1/1994; 7/2000; eliminated 7/2004; 7/2005 (not listed)   NAKINA
2 HRDX M-P Petroleum Ltd. added 10/1975; eliminated 10/1978   NAKINA
3 HRDX Hagaman Refining Co. 8/1920   NAKINA
4 HRDX Hydrocarbons Inc. added 10/1974; 1/1975; eliminated 10/1975   NAKINA
5 HRDX Hydrocarbons Inc. added 10/74; 1/75   NRHS
6 HRDX M-P Petroleum Ltd. eliminated 10/78   NRHS
7 HRDX Silver Star Enterprises, Inc. added 1/94; 7/2000   NRHS
8 HRDX *HAGAMAN REFINING CO.     PWRC
9 HRDX *M-P PETROLEUM LTD. [HYDROCARBONS, INC.]     PWRC
10 HRDX +SILVER STAR ENTERPRISES, INC.     PWRC
11 HRDX Hagaman Refining (Silver Star Enterprises)     RSRV