| 1201 | SBSU | SBS CONTAINERS LIMITED | | CY | BIC |
| 1202 | SBSU | SBS SAMOTHRAKITIS SHIPPING LTD | | | SCAC4 |
| 1203 | SBSV | SAFETY BUS SERVICE | | | SCAC4 |
| 1204 | SBSW | SBS WORLWIDE LIMITED | | | SCAC4 |
| 1205 | SBSX | Schaffner Bros. Co. | 7/1923 | | NAKINA |
| 1206 | SBSX | *SCHAFFNER BROS. CO, | | | PWRC |
| 1207 | SBSX | *SHINE BROTHERS SPUR | | | PWRC |
| 1208 | SBSY | STURDY BUILT STRUCTURES CORP | | | SCAC4 |
| 1209 | SBT | Taftan Airlines | Callsign: Taftan, | IR | AVCODES |
| 1210 | SBT | Taftan Airlines | | | ICAO1 |
| 1211 | SBT | SUBURBAN TRAILS INC | | | SCAC4 |
| 1212 | SBTB | SERVICE BROS TRANSPORT INC | | | SCAC4 |
| 1213 | SBTD | S B TRUCKING LTD | | | SCAC4 |
| 1214 | SBTDT | STAVEBNI OBNOVA ŽELEZNIC a.s. | | CZ | VKM |
| 1215 | SBTE | S B TRANSFER | | | SCAC4 |
| 1216 | SBTG | STEWARD, BILL TRUCKING | | | SCAC4 |
| 1217 | SBTJ | SUN TRANSPORT & LOGISTICS INC | | | SCAC4 |
| 1218 | SBTN | S B TRUCKING LLC | | | SCAC4 |
| 1219 | SBTP | SANDHU BROTHERS TRANSPORT LTD | | | SCAC4 |
| 1220 | SBTQ | SUNBELT TRANSPORT INC | | | SCAC4 |
| 1221 | SBTU | ООО SIBTRANS | | RUS | BIC |
| 1222 | SBTW | SCHULTZ BROS TRUCKING INC | | | SCAC4 |
| 1223 | SBTX | First Union Rail Corp. | added 10/2009 | | NAKINA |
| 1224 | SBTX | JAIX Leasing Co. | added 7/2009; eliminated 10/2009 | | NAKINA |
| 1225 | SBTX | FIRST UNION RAIL CORPORATION | | | SCAC4 |
| 1226 | SBU | Saint Barth Commuter | IATA: PV, Callsign: Black Fin, | BLM | AVCODES |
| 1227 | SBU | Saint Barth Commuter | | | ICAO1 |
| 1228 | SBUB | S & B TRUCKING LLP | | | SCAC4 |
| 1229 | SBUC | SURE BETT TRUCKING INC | | | SCAC4 |
| 1230 | SBUN | SUBURBAN GRINDING INC | | | SCAC4 |
| 1231 | SBUR | SUBURBAN TRUCKING | | | SCAC4 |
| 1232 | SBUU | CTR | | | SCAC4 |
| 1233 | SBV | Skyblue Aviation Ltd | Callsign: Ripple, | GB | AVCODES |
| 1234 | SBV | SOUTH BRANCH VALLEY RAILROAD | | | PWRC |
| 1235 | SBVD | SOUND BEVERAGE DISTRIBUTORS INC | | | SCAC4 |
| 1236 | SBVR | South Branch Valley Rail Road | added 10/1978; eliminated 1/1979; 1/1980-7/2005 | | NAKINA |
| 1237 | SBVR | South Branch Valley Rail Road | added 10/78; eliminated 1/79; 1/80-7/2000 | | NRHS |
| 1238 | SBVR | SOUTH BRANCH VALLEY RAIL ROAD | | | PWRC |
| 1239 | SBVR | South Branch Valley Railroad | | | RSRV |
| 1240 | SBVR | South Branch Valley | | USA | TRAFFIC |
| 1241 | SBVU | SCHEIER BRENNSTOFFE UND BERGRUNNUNH | | | SCAC4 |
| 1242 | SBVV | STREAMLINES BV | | | SCAC4 |
| 1243 | SBVW | SIBBALD, DAVID WAYNE | | | SCAC4 |
| 1244 | SBW | Snowbird Airlines Oy | Callsign: Snowman, | FIN | AVCODES |
| 1245 | SBW | Museiföreningen Stambanans Wänner | | SE | VKM |
| 1246 | SBWB | SBW FREIGHT & LOGISTICS INC | | | SCAC4 |
| 1247 | SBWC | STIEMAR BREAD WINDSOR COMPANY LTD | | | SCAC4 |
| 1248 | SBWD | SOUTH BEND MOTOR FREIGHT | | | SCAC1 |
| 1249 | SBWH | STRASSBURG, W H INC | | | SCAC4 |
| 1250 | SBWK | SMITHBOWER, ALAN TRUCKING | | | SCAC4 |
| 1251 | SBWN | SABELLI BOILER WORKS INC | | | SCAC4 |
| 1252 | SBWP | SAMBO WHOLESALE CORP | | | SCAC4 |
| 1253 | SBX | North Star Air Cargo, Inc. | Callsign: Sky Box, | USA | AVCODES |
| 1254 | SBX | North Star Air Cargo | | | ICAO1 |
| 1255 | SBXA | SMITH, E BOX INC | | | SCAC4 |
| 1256 | SBXB | SEBASTIAN EXPRESS INC | | | SCAC4 |
| 1257 | SBXE | SB EXPRESS INC | | | SCAC4 |
| 1258 | SBXF | SPRINGBROOK EXPRESS LLC | | | SCAC4 |
| 1259 | SBXG | SABER TRANSPORTATION | | | SCAC4 |
| 1260 | SBXI | SNOWBALL EXPRESS INC | | | SCAC4 |
| 1261 | SBXL | SABRE TRANSPORTATION LLC | | | SCAC4 |
| 1262 | SBXM | SEABOX LIMITED | | | SCAC4 |
| 1263 | SBXN | SEA BOX INC | | | SCAC4 |
| 1264 | SBXP | SOUTH BOUND EXPRESS CO INC | | | SCAC4 |
| 1265 | SBXQ | SENSIBLE TRANSPORT INC | | | SCAC4 |
| 1266 | SBXR | SBS FREIGHT EXPRESS INC | | | SCAC4 |
| 1267 | SBXS | SABRE EXPRESS INC | | | SCAC4 |
| 1268 | SBXU | SEA-BRIDGE EXPRESS, INC. | | | SCAC4 |
| 1269 | SBXW | SB EXPRESS INC | | | SCAC4 |
| 1270 | SBY | BFS Berliner Spezial Flug, Luftfahrtunternehen GmbH | Callsign: Brandy, | D | AVCODES |
| 1271 | SBYA | SUNBURY AMERICA, INC | | | SCAC1 |
| 1272 | SBYB | SELLERS, BILLY TRANSPORT INC | | | SCAC4 |
| 1273 | SBYC | SHELBY OIL CO | | | SCAC4 |
| 1274 | SBYD | SAMAN BAKERY LTD | | | SCAC4 |
| 1275 | SBYF | STOBY FOOD PRODUCTS | | | SCAC4 |
| 1276 | SBYG | SIGNATURE BAKERY LLC | | | SCAC4 |
| 1277 | SBYH | SHELBY TRANSPORTATION | | | SCAC4 |
| 1278 | SBYK | SCULPTURE BY TIMOTHY P SCHMALZ INC | | | SCAC4 |
| 1279 | SBYL | SUN BAY INTERNATIONAL | | | SCAC4 |
| 1280 | SBYQ | SANDERS BROTHERS CONSTRUCTION COMPA | | | SCAC4 |
| 1281 | SBZ | Scibe-Airlift | IATA: ZM, Callsign: Scibe Airlift, Ceased operations on 29 September 1998. Founded in 1976 as SBZ Cargo. | ZRE | AVCODES |
| 1282 | SBZ | Scibe-Airlift | IATA: ZM, Callsign: Scibe Airlift, | ZAR | AVCODES |
| 1283 | SBZ | Scibe Airlift | | | ICAO1 |
| 1284 | SBZE | SEA BREEZER SHIPPING SA | | | SCAC4 |
| 1285 | SBZK | SEA BREEZE TRUCKING INC | | | SCAC4 |
| 1286 | SBZM | SERRANO BALTAZAR, ARMANDO | | | SCAC4 |
| 1287 | SC | Shandong Airlines | ICAO: CDG, Callsign: Shandong, IATA Prefix: 324, | PRC | AVCODES |
| 1288 | SC | Servicos Aereos Cruzeiro Do Sul, S.A. | ICAO: CRZ, Callsign: Cruzeiro, Founded in 1927 as Syndicato Condor. Commenced operations in 1928. Ceased operations during 1993. | BR | AVCODES |
| 1289 | SC | Sullivan County R.R. (Boston & Maine R.R.) | 8/1920-7/1923 | | NAKINA |
| 1290 | SC | Sumter & Choctaw Ry. Co. | 1/1975-1/1980; eliminated 1/1986 | | NAKINA |
| 1291 | SC | Sumter & Choctaw Ry. Co. | 1/75-1/80; eliminated 1/86 | | NRHS |
| 1292 | SC | *BOSTON & MAINE RAILROAD [SULLIVAN COUNTY RAILROAD] | | | PWRC |
| 1293 | SC | *SUMPTER & CHOCTAW RAILWAY | | | PWRC |
| 1294 | SC | Sumter and Choctaw Railway | | | RSRV |
| 1295 | SC | Southern Railway | 1999: 710km standard gauge, electrified at 750V= 3rd rail Southern (New Southern Railway Ltd.) is the latest name of the train operating company that took over from Connex South Central on the routes to South London, Surrey, and Sussex from Victoria and London Bridge. On 30 May 2004, the franchise was rebranded as Southern.. Southern also operates the cross-London Watford Junction to Gatwick Airport / Brighton route via Kensington (Olympia) and Clapham Junction (the West London Line). The franchise is owned by Govia, a joint venture between transport groups Go-Ahead Group and Keolis. | GB | TRAFFIC |
| 1296 | SC | South Central (New Southern Railway) | | UK | VKM |
| 1297 | SCA | South Central Air, Inc. | Callsign: South Central, | USA | AVCODES |
| 1298 | SCA | South Central Air, Inc. | IATA: XE, Designator recalled by IATA | USA | AVCODES |
| 1299 | SCA | Sierra Charlie Aviation, LLC | Callsign: Aviator, | USA | AVCODES |
| 1300 | SCA | South Central Air | | | ICAO1 |
