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
SRPA SRPB SRPC SRPH SRPJ SRPK SRPQ SRPS SRPT SRPV SRPW SRPX SRPY SRPZ
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
SRPA SRPB SRPC SRPH SRPJ SRPK SRPQ SRPS SRPT SRPV SRPW SRPX SRPY SRPZ
| 1 | SRP | Polizeihubschrafterstaffel Rheinland-Pfalz | ICAO1 | ||
| 2 | SRP | SALT RIVER PROJECT | PWRC | ||
| 3 | SRP | Scandic Rail Partners ApS | 2006 - | DK | jernbanen.dk |
| 4 | SRP | Safe Handling Rail | RSRV | ||
| 5 | SRPA | SERVICIO PUBLICO FEDERAL | SCAC4 | ||
| 6 | SRPB | SHARP LOGISTICS INC | SCAC4 | ||
| 7 | SRPC | SIERRA PACIFIC EXPRESS | SCAC4 | ||
| 8 | SRPH | SMITH, RALPH COMPANY | SCAC4 | ||
| 9 | SRPJ | SOUTHERN ARC TRANSPORTATION LLC | SCAC4 | ||
| 10 | SRPK | SHARP EXPRESS | SCAC4 | ||
| 11 | SRPQ | STAR TRANSPORT | SCAC4 | ||
| 12 | SRPS | Scottish Railway Preservation Society | UK | VKM | |
| 13 | SRPT | STARK PROPERTIES | SCAC4 | ||
| 14 | SRPV | SHARP TRANSIT | SCAC4 | ||
| 15 | SRPW | SHARPLESS, M TRUCKING | SCAC4 | ||
| 16 | SRPX | Rhinelander Division, St. Regis Paper Co. | added 1/68; 4/70-1/75 | NRHS | |
| 17 | SRPX | *RHINELANDER DIV., ST. REGIS PAPER CO. | PWRC | ||
| 18 | SRPX | *SALT RIVER PROJECT, AGRICULTURAL IMPROVEMENT & POWER DISTRICT | PWRC | ||
| 19 | SRPX | Rhinelander Division, St. Regis Paper Co. | added 1/1968; 4/1970-1/1975 | NAKINA | |
| 20 | SRPX | Salt River Project Agricultural Improvement and Power District | added 7/1978; 1/1980; eliminated 10/1989; 1/1994-7/2005 (not listed) | NAKINA | |
| 21 | SRPX | Salt River Project Agricultural Improvement and Power District | RSRV | ||
| 22 | SRPX | SALT RIVER PROJECT, AGRI.IMPRVMT & | SCAC4 | ||
| 23 | SRPX | Salt River Project Agricultural Improvement and Power District | added 7/78; 1/80; eliminated 10/89; 1/94-7/2000 | NRHS | |
| 24 | SRPY | STARS & STRIPES TRANSPORT | SCAC4 | ||
| 25 | SRPZ | SAVANNAH RIVER PLANT | PWRC |