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
SRA SRB SRC SRD SRE SRF SRG SRH SRI SRJ SRK SRL SRM SRN SRO SRP SRQ SRR SRS SRT SRU SRV SRW SRX SRY SRZ
SRRA SRRC SRRD SRRF SRRH SRRK SRRL SRRN SRRQ SRRW SRRX
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
SRA SRB SRC SRD SRE SRF SRG SRH SRI SRJ SRK SRL SRM SRN SRO SRP SRQ SRR SRS SRT SRU SRV SRW SRX SRY SRZ
SRRA SRRC SRRD SRRF SRRH SRRK SRRL SRRN SRRQ SRRW SRRX
| 1 | SRR | Star Air | ICAO1 | ||
| 2 | SRR | STARR TRANSIT CO INC | SCAC4 | ||
| 3 | SRRA | SIERRA COURIER | SCAC4 | ||
| 4 | SRRC | SIERRA RAILROAD CO. | PWRC | ||
| 5 | SRRD | SERVICIOS RAPIDOS TREBOL SA DE CV | SCAC4 | ||
| 6 | SRRF | STAR FREIGHT SYSTEMS INC | SCAC4 | ||
| 7 | SRRH | SHERRER, TODD | SCAC4 | ||
| 8 | SRRK | STARR TRUCKING CORP | SCAC4 | ||
| 9 | SRRL | SERRALTA HERNANDEZ, CARLOS | SCAC4 | ||
| 10 | SRRN | STARRS TRANSPORTATION | SCAC4 | ||
| 11 | SRRQ | SINGING RIVER RADIATOR SERVICE | SCAC4 | ||
| 12 | SRRW | SHORELAND RACING | SCAC4 | ||
| 13 | SRRX | Star R.R. Equipment | added 1/71; 1/75-1/80; eliminated 7/92; 1/94-7/2000 | NRHS | |
| 14 | SRRX | *SANDY RIVER & RANGELEY LAKES RAILROAD | PWRC | ||
| 15 | SRRX | +STAR RAILROAD EQUIPMENT CO | PWRC | ||
| 16 | SRRX | Star Refining & Producing Co. | 7/1923; 7/1935; 7/1937-4/1938 (not listed) | NAKINA | |
| 17 | SRRX | Star R.R. Equipment | added 1/1971; 1/1975-1/1980; eliminated 7/1992; 1/1994-7/2005 (not listed) | NAKINA | |
| 18 | SRRX | Star Railroad Equipment | RSRV | ||
| 19 | SRRX | STAR RAILROAD EQUIPMENT CO | SCAC4 |