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
SWA SWB SWC SWD SWE SWF SWG SWH SWI SWJ SWK SWL SWM SWN SWO SWP SWQ SWR SWS SWT SWU SWV SWW SWX SWY SWZ
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
SWA SWB SWC SWD SWE SWF SWG SWH SWI SWJ SWK SWL SWM SWN SWO SWP SWQ SWR SWS SWT SWU SWV SWW SWX SWY SWZ
| 1 | SW | Southwestern R.R. Co. Inc. | added 1/91; 1/94-7/2000 | NRHS | |
| 2 | SW | SOUTHWESTERN RAILROAD CO., INC. | PWRC | ||
| 3 | SW | Southwestern R.R. Co. Inc. | added 1/1991; 1/1994-7/2005 | NAKINA | |
| 4 | SW | South West Trains | UK | VKM | |
| 5 | SW | Southwestern Railroad | RSRV | ||
| 6 | SW | SOUTHWESTERN RAILROAD COMPANY INC | SCAC4 | ||
| 7 | SWA | Southwest Airlines | IATA: WN | ICAO1 | |
| 8 | SWA | Stadtwerke Andernach GmbH | DE | VKM | |
| 9 | SWAA | SCHWING AMERICA INC | SCAC4 | ||
| 10 | SWAD | SWD TRANSPORT INC | SCAC4 | ||
| 11 | SWAF | STENA WECO A/S | SCAC4 | ||
| 12 | SWAH | SUPER THIN SAWS INC | SCAC4 | ||
| 13 | SWAI | SOUTHERN PLAINS CO-OP AT LEWIS KS | SCAC4 | ||
| 14 | SWAJ | SWANTON, J FUEL OIL CO INC | SCAC4 | ||
| 15 | SWAL | SIERRA WEST AIRLINES | SCAC4 | ||
| 16 | SWAM | SAVEWAY PETROLEUM INC | SCAC4 | ||
| 17 | SWAQ | SEWA ENTERPRISES LTD | SCAC4 | ||
| 18 | SWAR | STEWART EXPRESS LTD | SCAC4 | ||
| 19 | SWAV | SWIFT AIR LOGISTICS LLC | SCAC4 | ||
| 20 | SWAY | SEAWAY COMPANY OF CATALINA | SCAC4 | ||
| 21 | SWB | Swissboogie Parapro | ICAO1 | ||
| 22 | SWB | Stockholm - Västerås - Bergslagens Järnvägar | 1875 - 1944 | S | svenska-lok.se |
| 23 | SWB | Schwäbische Waldbahn GmbH | Welzheim | D | privat-bahn.de |
| 24 | SWBC | SCHWAB & COMPANY | SCAC4 | ||
| 25 | SWBD | SEA WISE MARINE 2001 INC | SCAC4 | ||
| 26 | SWBE | STAGE WEST EXPRESS INC | SCAC4 | ||
| 27 | SWBF | S W T S | SCAC4 | ||
| 28 | SWBI | SWARTZENTRUBER ENTERPRISES INC | SCAC4 | ||
| 29 | SWBL | SOUTHWOLD B AND L LESSORS INC | SCAC4 | ||
| 30 | SWBO | STEWART, R B PETROLEUM PRODUCTS INC | SCAC4 | ||
| 31 | SWBP | SUMMER WIND TRUCKING | SCAC4 | ||
| 32 | SWBT | STEWART, BRAD TRUCKING | SCAC4 | ||
| 33 | SWBW | SWANSON BARK & WOOD PRODUCTS INC | SCAC4 | ||
| 34 | SWC | South West Air | ICAO1 | ||
| 35 | SWCA | SOUTHWESTERN CARRIERS, INC. | SCAC1 | ||
| 36 | SWCA | SOUTHWESTERN CARRIERS INC | SCAC4 | ||
| 37 | SWCB | SOUTHWEST CONCRETE & CONST LTD | SCAC4 | ||
| 38 | SWCC | SOUTHWEST CONVENIENCE STORES LLC | SCAC4 | ||
| 39 | SWCE | SWANSON, CHUCK, INC | SCAC1 | ||
| 40 | SWCE | SWANSON, CHUCK INC | SCAC4 | ||
| 41 | SWCH | STEHOUWER FROZEN FOODS INC | SCAC4 | ||
| 42 | SWCI | SOUTHWEST CONNECTION INC | SCAC4 | ||
| 43 | SWCK | SWEITZER TRUCKING LLC | SCAC4 | ||
| 44 | SWCL | SOUTHWAY CARRIERS INC | SCAC4 | ||
| 45 | SWCO | SELL, WAYNE W CORPORATION | SCAC4 | ||
| 46 | SWCQ | SWIFT CANOE & KAYAK | SCAC4 | ||
| 47 | SWCR | SEWELL, ROGER | SCAC4 | ||
| 48 | SWCT | SWIFT CONSTRUCTION COMPANY INC | SCAC4 | ||
| 49 | SWCV | SWC TRUCKING | SCAC4 | ||
| 50 | SWCW | SWAN CREW BOATS INC | SCAC4 | ||
| 51 | SWCX | The Sherwin-Williams Co. of Canada, Ltd. | 4/38-4/61; eliminated 7/64 | NRHS | |
| 52 | SWCX | *SHERWIN-WILLIAMS CO. OF CANADA, LTD. | PWRC | ||
| 53 | SWCX | *ESTECH, INC. [SWIFT AGRICULTURAL CHEMICALS CORP.] | PWRC | ||
| 54 | SWCX | SWEETWATER CENTRAL RAILROAD | PWRC | ||
| 55 | SWCX | The Sherwin-Williams Co. of Canada, Ltd. | 7/1937-4/1961; eliminated 7/1964 | NAKINA | |
| 56 | SWCX | Swift Chemical Co. | added 1/1974; 1/1975; eliminated 10/1975 | NAKINA | |
| 57 | SWCX | Swift Agricultural Chemicals Corp. | added 10/1975; 1/1980; eliminated 7/1980 | NAKINA | |
| 58 | SWCX | Estech General Chemicals Corp. | added 7/1980; eliminated 10/1981 | NAKINA | |
| 59 | SWCX | Estech, Inc. | added 10/1981; eliminated 1/1985 | NAKINA | |
| 60 | SWCX | Estech | RSRV | ||
| 61 | SWCX | Swift Chemical Co. | added 1/74; 1/75 | NRHS | |
| 62 | SWCX | Swift Agricultural Chemicals Corp. | 1/80; eliminated 7/80 | NRHS | |
| 63 | SWCX | Estech General Chemicals Corp. | added 7/80; eliminated 10/81 | NRHS | |
| 64 | SWCX | Estech, Inc. | added 10/81; eliminated 1/85 | NRHS | |
| 65 | SWCY | STALWART TRANSPORTATION | SCAC4 | ||
| 66 | SWD | Southern Winds Airlines | IATA: A4 | ICAO1 | |
| 67 | SWDC | SCHULTZ WILDLIFE BRONZE | SCAC4 | ||
| 68 | SWDE | STATE WIDE TRANSPORT INC | SCAC4 | ||
| 69 | SWDG | SILVERWOOD SHIPPING CORPORATION | SCAC4 | ||
| 70 | SWDI | SWEDCANUS INTERTRANS INC | SCAC4 | ||
| 71 | SWDJ | SLAWINSKI FARMS | SCAC4 | ||
| 72 | SWDK | STATEWIDE TRANSPORT CORPORATION | SCAC1 | ||
| 73 | SWDL | SPICE WORLD INC | SCAC4 | ||
| 74 | SWDM | SWEET DREAMS TRANSPORTATION | SCAC4 | ||
| 75 | SWDO | SCHWARTZ OIL COMPANY INC | SCAC4 | ||
| 76 | SWDQ | STANWOOD PRODUCTS LIMITED | SCAC4 | ||
| 77 | SWDS | STATEWIDE TRANSPORT INC | SCAC4 | ||
| 78 | SWDV | SWARD, VIC, TRUCKING | SCAC1 | ||
| 79 | SWDV | SW TRUCKING LLC | SCAC4 | ||
| 80 | SWDW | SWITZER TRANSPORT INC | SCAC4 | ||
| 81 | SWE | Swedeways | ICAO1 | ||
| 82 | SWEE | SHAW, ELIZABETH | SCAC4 | ||
| 83 | SWEG | Südwestdeutsche Verkehrs AG | DE | VKM | |
| 84 | SWEG | Südwestdeutsche Verkehrs AG | Lahr | D | privat-bahn.de |
| 85 | SWEL | SWEET EXPRESS LLC | SCAC4 | ||
| 86 | SWEO | SPHEREWE | SCAC4 | ||
| 87 | SWEP | S & W EXPRESS INC | SCAC4 | ||
| 88 | SWEQ | SWEDISH AMERICAN EXPRESS | SCAC4 | ||
| 89 | SWER | SEA-WINGS EXPRESS INC | SCAC4 | ||
| 90 | SWES | SOUTHWESTERN SCIENTIFIC CO INC | SCAC4 | ||
| 91 | SWET | SOUTHWEST TRANSPORT LOGISTICS INC | SCAC4 | ||
| 92 | SWEW | SWEETWATER MUSIC | SCAC4 | ||
| 93 | SWEY | SWEENEY TRANSPORTATION, INC | SCAC1 | ||
| 94 | SWEY | SWEENEY TRANSPORTATION INC | SCAC4 | ||
| 95 | SWF | Galair International | ICAO1 | ||
| 96 | SWFA | SWAFFORD TRANSPORT | SCAC4 | ||
| 97 | SWFB | SWIFT ENGINEERING INC | SCAC4 | ||
| 98 | SWFH | SWINFORD TRANSPORT INC | SCAC4 | ||
| 99 | SWFI | SWANSON FUEL INC | SCAC4 | ||
| 100 | SWFJ | SYNERGY WORLDWIDE LLC | SCAC4 |