Real world company prefixes
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S& 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
SCA SCB SCC SCD SCE SCF SCG SCH SCI SCJ SCK SCL SCM SCN SCO SCP SCQ SCR SCS SCT SCU SCV SCW SCX SCY SCZ
SCRD SCRE SCRF SCRG SCRL SCRM SCRN SCRO SCRP SCRQ SCRT SCRU SCRW SCRX SCRY SCRZ
S& 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
SCA SCB SCC SCD SCE SCF SCG SCH SCI SCJ SCK SCL SCM SCN SCO SCP SCQ SCR SCS SCT SCU SCV SCW SCX SCY SCZ
SCRD SCRE SCRF SCRG SCRL SCRM SCRN SCRO SCRP SCRQ SCRT SCRU SCRW SCRX SCRY SCRZ
| 1 | SCR | Si-Chang Flying Service | ICAO1 | ||
| 2 | SCR | SYDNEY COAL RAILWAY | PWRC | ||
| 3 | SCR | Sydney Coal Railway | RSRV | ||
| 4 | SCR | SYDNEY COAL RAILWAY | SCAC4 | ||
| 5 | SCRD | SO COAST TRANS & DIST INC | SCAC4 | ||
| 6 | SCRE | SCHAFER EXPRESS AND TRANSFER CO | SCAC1 | ||
| 7 | SCRE | SCHAFER EXPRESS AND TRANSFER CO | SCAC4 | ||
| 8 | SCRF | South Carolina Central R.R. Co., Inc. | added 4/88; 1/94-7/2000 | NRHS | |
| 9 | SCRF | SOUTH CAROLINA CENTRAL RAILROAD CO., INC. | PWRC | ||
| 10 | SCRF | South Carolina Central R.R. Co., Inc. | added 4/1988; 1/1994-7/2005 | NAKINA | |
| 11 | SCRF | South Carolina Central Railroad | RSRV | ||
| 12 | SCRF | SOUTH CAROLINA CENTRAL RAILROAD CO | SCAC4 | ||
| 13 | SCRG | STREET CARTAGE LIMITED | SCAC4 | ||
| 14 | SCRL | SCRAP METAL SERVICES LLC | SCAC4 | ||
| 15 | SCRM | SEACOR MARINE LLC | SCAC4 | ||
| 16 | SCRN | SUN COAST RESOURCES INC | SCAC4 | ||
| 17 | SCRO | SAUCIER, PIERRE TRANSPORT INC | SCAC4 | ||
| 18 | SCRP | S C TRANSPORT | SCAC4 | ||
| 19 | SCRQ | SCORE | SCAC4 | ||
| 20 | SCRT | SACRAMENTO COUNTY REGIONAL TRANSIT DISTRICT | PWRC | ||
| 21 | SCRU | STAR CONTAINER SERVICES | SCAC4 | ||
| 22 | SCRW | SEAWAY COMMERCIAL RAILWAY | PWRC | ||
| 23 | SCRW | Seaway Commercial Railway | RSRV | ||
| 24 | SCRW | SCHERME | SCAC4 | ||
| 25 | SCRX | Santa Clarita Railway d/b/a James Clark & Co. | Jul-00 | NRHS | |
| 26 | SCRX | *SUSQUEHANNA CHEMICAL CORP. | PWRC | ||
| 27 | SCRX | *SANTA CLARITA RAILWAY, DBA JAMES CLARK & COMPANY | PWRC | ||
| 28 | SCRX | *SCHUYLKILL COUNTY RAIL AUTHORITY | PWRC | ||
| 29 | SCRX | +SOUTH CAROLINA PUBLIC RAILWAYS | PWRC | ||
| 30 | SCRX | Susquehanna Chemical Corp. | 4/1947; 1/1950 (not listed) | NAKINA | |
| 31 | SCRX | Santa Clarita Railway d/b/a James Clark & Co. | 7/2000 (not listed) | NAKINA | |
| 32 | SCRX | South Carolina Public Railways | 7/2005 | NAKINA | |
| 33 | SCRX | Santa Clarita Railway (James Clark and) | RSRV | ||
| 34 | SCRX | SOUTH CAROLINA PUBLIC RAILWAYS | SCAC4 | ||
| 35 | SCRY | SOUTH CENTRAL RECYCLING | SCAC4 | ||
| 36 | SCRZ | SQUAW CREEK COAL COMPANY | PWRC |