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
S& S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 SA SB SC SD SE SF SG SH SI SJ SK SL SM SN SO SP SQ SR SS ST SU SV SW SX SY SZ
SDA SDB SDC SDD SDE SDF SDG SDH SDI SDJ SDK SDL SDM SDN SDO SDP SDQ SDR SDS SDT SDU SDV SDW SDX SDY SDZ
SDEA SDEC SDED SDEH SDEJ SDEM SDEO SDEQ SDER SDET SDEW SDEX SDEY
1 SDEX Swindell-Dresser Energy Supply Co. added 1/1976; 1/1980-7/2000; eliminated 4/2001   NAKINA
2 SDEX Savage-Harrington Energy added 4/2001; eliminated 7/2005; 7/2005 (not listed)   NAKINA
3 SDEX Swindell-Dresser Energy Supply Co. 1/80-7/2000; eliminated 4/2001   NRHS
4 SDEX Savage-Harrington Energy added 4/2001   NRHS
5 SDEX SAVAGE-HARRINGTON ENERGY [SWINDELL-DRESSLER ENERGY SUPPLY CO.]     PWRC
6 SDEX Swindell-Dressler Energy Supply     RSRV
7 SDEX SAVAGE-HARRI     SCAC4