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
O& O2 O3 O4 O5 O6 O7 O8 O9 OA OB OC OD OE OF OG OH OI OJ OK OL OM ON OO OP OQ OR OS OT OU OV OW OX OY OZ
OFA OFB OFC OFD OFE OFF OFG OFI OFJ OFK OFL OFM OFN OFO OFP OFR OFS OFT OFW OFX OFY
OFOA OFOB OFOE OFOF OFOG OFOH OFOO OFOQ OFOS OFOX
1 OFOX Residco added 7/1988; 1/1994-7/2000; eliminated 10/2004; 7/2005 (not listed); added 7/2008   NAKINA
2 OFOX Residco added 7/88; 1/94-7/2000   NRHS
3 OFOX RESIDCO     PWRC
4 OFOX Residco     RSRV