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
URA URB URC URD URE URF URG URH URI URJ URK URL URM URN URO URP URQ URR URS URT URV URW URX URY
URDS URDX
1 URDX United States Steel Corp., Resource Development Group added 10/1980; eliminated 4/1985   NAKINA
2 URDX Arch of Kentucky, Inc. added 4/1985; 1/1994; eliminated 4/1994; 7/2000-7/2005 (not listed)   NAKINA
3 URDX United States Steel Corp., Resource Development Group added 10/80; eliminated 4/85   NRHS
4 URDX Arch of Kentucky, Inc. added 4/85; 1/94; eliminated 4/94; 7/2000   NRHS
5 URDX ARCH OF KENTUCKY, INC. {UNITED STATES STEEL CORP., RESOURCE DEVELOPMENT GROUP]     PWRC
6 URDX United States Steel     RSRV
7 URDX ARCH OF KENTUCKY, INC.     SCAC4