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
G& G0 G1 G2 G3 G4 G5 G6 G7 G8 G9 GA GB GC GD GE GF GG GH GI GJ GK GL GM GN GO GP GQ GR GS GT GU GV GW GX GY GZ
GRA GRB GRC GRD GRE GRF GRG GRH GRI GRJ GRK GRL GRM GRN GRO GRP GRQ GRR GRS GRT GRU GRV GRW GRX GRY GRZ
GRCC GRCF GRCG GRCI GRCJ GRCK GRCL GRCM GRCN GRCR GRCU GRCV GRCX GRCZ
1 GRCX Granite Rock Co. added 1/1971; 1/1975-1/1994; 7/2000-7/2005 (not listed)   NAKINA
2 GRCX Warren Petroleum Corp. 4/1961   NAKINA
3 GRCX Gulf Oil Corp. eliminated 7/1961   NAKINA
4 GRCX Gulf Refining Co. 8/1920-7/1935   NAKINA
5 GRCX Gulf Oil Corp. 7/1937-10/1957   NAKINA
6 GRCX Gulf Oil Corp. 4/38-10/57   NRHS
7 GRCX Warren Petroleum Corp. Apr-61   NRHS
8 GRCX Granite Rock Co. added 1/71; 1/75-7/2000   NRHS
9 GRCX *GULF OIL CORP. [WARREN PETROLEUM CORP.; GULF REFINING CO.]     PWRC
10 GRCX +GRANITE ROCK CO.     PWRC
11 GRCX Granite Rock     RSRV
12 GRCX GRANITE ROCK CO.     SCAC4