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
U0 U1 U2 U3 U4 U5 U6 U7 U8 U9 UA UB UC UD UE UF UG UH UI UJ UK UL UM UN UO UP UQ UR US UT UU UV UW UX UY UZ
USA USB USC USD USE USF USG USH USI USJ USK USL USM USN USO USP USQ USR USS UST USU USV USW USX USY
USMB USMC USMG USML USMM USMN USMR USMS USMU USMV USMX USMZ
1 USMX U.S. Steel Mining Co., Inc. 7/2000-7/2005 (not listed)   NAKINA
2 USMX U.S. Steel Mining Co., Inc. Jul-00   NRHS
3 USMX U.S. STEEL MINING COMPANY, INC.     PWRC
4 USMX US Steel Mining     RSRV