| 10901 | STPS | SPORTS TECH PRODUCTIONS | | | SCAC4 |
| 10902 | STPTP | Tretiy Park (Third parc) | City: Sankt Petersburg | RUS | TRAFFIC |
| 10903 | STPU | STEP OILTOOLS (UK) LTD | | GB | BIC |
| 10904 | STPX | Southern Tar Products Co. | 8/1920 | | NAKINA |
| 10905 | STPX | Strategic Transport Systems, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 10906 | STPX | Strategic Transport Systems, Inc. | Jul-00 | | NRHS |
| 10907 | STPX | *SOUTHERN TAR PRODUCTS CO. | | | PWRC |
| 10908 | STPX | *SOUTH TEXAS PROJECT RAILROAD | | | PWRC |
| 10909 | STPX | +STRATEGIC TRANSPORT SYSTEMS, INC. | | | PWRC |
| 10910 | STPX | Strategic Transport Systems | | | RSRV |
| 10911 | STPZ | SANTEE COOPER POWER | | | PWRC |
| 10912 | STQ | Siberia-Interavia, Joint-Stock Company | Callsign: Sibinter, | RUS | AVCODES |
| 10913 | STQ | Star Air | IATA: 5H, Callsign: Stera, IATA Prefix: 301, Designator 5H recalled by IATA. ICAO designator changed from STZ | RI | AVCODES |
| 10914 | STQ | Star Wings Dortmund Luftfahrtgesellschaft mbH | Callsign: Startrek, | D | AVCODES |
| 10915 | STQ | Star Air | | | ICAO1 |
| 10916 | STQB | SKYNET TRANSPORTATION INC | | | SCAC4 |
| 10917 | STQC | STAR TRANSPORTATION COMPANY, A FL C | | | SCAC4 |
| 10918 | STQG | STAR TRUCKING | | | SCAC4 |
| 10919 | STQH | START TRUCKING INC | | | SCAC4 |
| 10920 | STQK | STEEL TECHNOLOGIES INC | | | SCAC4 |
| 10921 | STQM | SEA TRADE MARITIME CORP MONROVIA | | | SCAC4 |
| 10922 | STQR | STAR TRUCKING INC | | | SCAC4 |
| 10923 | STQS | SPECIALTY TRANSPORTATION SOLUTIONS | | | SCAC4 |
| 10924 | STQY | SCOTT COOPERATIVE ASSOCIATION | | | SCAC4 |
| 10925 | STR | Stellair T.A. | Callsign: Stellair, | F | AVCODES |
| 10926 | STR | Solitaire Air | ICAO Designaotr changed to FJR | JOR | AVCODES |
| 10927 | STR | Sterna Linhas Aereas Ltda | Callsign: Sterna, Ceased operations in 2017. Name changed from Solitaire Lil - Tayran. | BR | AVCODES |
| 10928 | STR | Red Star | | | ICAO1 |
| 10929 | STR | Shawnee Terminal Ry. Co., Inc. | eliminated 7/1999; 7/2000-7/2005 | | NAKINA |
| 10930 | STR | Shawnee Terminal Ry. Co., Inc. | eliminated 7/99; 7/2000 | | NRHS |
| 10931 | STR | SHAWNEE TERMINAL RAILWAY COMPANY | | | PWRC |
| 10932 | STR | Shawnee Terminal Railway | | | RSRV |
| 10933 | STR | SHAWNEE TERMINAL RAILWAY COMPANY IN | | | SCAC4 |
| 10934 | STR | Strukton Rail | | SE | VKM |
| 10935 | STRA | STRAIGHT SHOT LOGISTICS INC | | | SCAC4 |
| 10936 | STRA | Strabag AG | | AT | VKM |
| 10937 | STRAG | Schöni Transport AG | | CH | VKM |
| 10938 | STRAIL | Semitrailer | | | TRAFFIC |
| 10939 | STRAN | Société des transports de l'agglomération nazairienne | City: Saint-Nazaire | F | TRAFFIC |
| 10940 | STRB | SPEED TRANSPORTATION AIR FREIGHT | | | SCAC4 |
| 10941 | STRC | Stuart Channel Transportation Ltd. | 1/1994 | | NAKINA |
| 10942 | STRC | Stuart Channel Transportation Ltd. | Jan-94 | | NRHS |
| 10943 | STRC | RETIRED 10-28-92 ATP [STUART CHANNEL TRANSPORTATION LTD.] | | | PWRC |
| 10944 | STRC | Stuart Chemical Transportation | | | RSRV |
| 10945 | STRC | SURE TRACK COURIER LTD | | | SCAC4 |
| 10946 | STRCT | Strathcona County Transit | | CDN | TRAFFIC |
| 10947 | STRD | | City: Dijon | F | TRAFFIC |
| 10948 | STREK | Star Trek | | | TRAFFIC |
| 10949 | STRF | STAR FREIGHT SOLUTIONS INC | | | SCAC4 |
| 10950 | STRG | SOBANIA TRUCKING | | | SCAC4 |
| 10951 | STRI | SPISAK TRUCKING & REPAIR INC | | | SCAC4 |
| 10952 | STRJ | STAR TRANSPORTATION LLC | | | SCAC4 |
| 10953 | STRK | STARKWEATHER FREIGHT LINES | | | SCAC1 |
| 10954 | STRL | STRAITLINE TRANSPORTATION LLC | | | SCAC4 |
| 10955 | STRM | STURM FREIGHTWAYS INC | | | PWRC |
| 10956 | STRM | STARS TRANSPORTATION | | | SCAC4 |
| 10957 | STRN | SALINAS TRUCKING | | | SCAC4 |
| 10958 | STRO | SNIDER, TROY | | | SCAC4 |
| 10959 | STRP | ST. REGIS PAPER CO. | | | PWRC |
| 10960 | STRP | STAR PETROLEUM CO INC | | | SCAC4 |
| 10961 | STRQ | STARLITE TRANSPORT | | | SCAC4 |
| 10962 | STRS | SARAI TRUCKING | | | SCAC4 |
| 10963 | STRSM | Société de transport de la Rive-Sud de Montréal | City: Longueuil (Quebec) | CDN | TRAFFIC |
| 10964 | STRT | The Stewartstown R.R. Co. | 1/1975-7/2005 | | NAKINA |
| 10965 | STRT | The Stewartstown R.R. Co. | 1/75-7/2000 | | NRHS |
| 10966 | STRT | STEWARTSTOWN RAILROAD CO. | | | PWRC |
| 10967 | STRT | Stewartstown Railroad | | | RSRV |
| 10968 | STRT | The Stewartstown R.R. Co. | | USA | TRAFFIC |
| 10969 | STRU | TOTE MARITIME PUERTO RICO | | USA | BIC |
| 10970 | STRU | Sea Star Line | | | RSRV |
| 10971 | STRU | SEA STAR LINE LLC | | | SCAC4 |
| 10972 | STRU | Hans Strube Gleisbau, Hochbau Tiefbau GmbH | | DE | VKM |
| 10973 | STRUKTON | | | NL | TRAFFIC |
| 10974 | STRW | Southern Railway | | UK | VKM |
| 10975 | STRX | Starlight Refining Co., Ltd. | 7/1937 | | NAKINA |
| 10976 | STRX | St. Regis Paper Co. | added 1/1983; eliminated 5/1983 | | NAKINA |
| 10977 | STRX | A.E. Staley Manufacturing Co. | added 4/1990; eliminated 1/1994 | | NAKINA |
| 10978 | STRX | Trinity Industries Leasing Co. | added 1/1994-7/2005; eliminated 1/2007 | | NAKINA |
| 10979 | STRX | St. Regis Paper Co. | added 1/83; eliminated 5/83 | | NRHS |
| 10980 | STRX | A.E. Staley Manufacturing Co. | added 4/90; eliminated 1/94 | | NRHS |
| 10981 | STRX | Trinity Industries Leasing Co. | added 1/94-7/2000 | | NRHS |
| 10982 | STRX | *STARLIGHT REFINING CO., LTD. | | | PWRC |
| 10983 | STRX | *STATE UNIVERSITY RAILROAD | | | PWRC |
| 10984 | STRX | *(TILX) TRINITY INDUSTRIES LEASING CO. - ST REGIS PAPER CO. | | | PWRC |
| 10985 | STRX | St. Regis Paper | | | RSRV |
| 10986 | STRZ | STROH/SCHLITZ BREWERY | | | PWRC |
| 10987 | STRZ | Stroh/Schlitz Brewery | | | RSRV |
| 10988 | STRZ | STROH/SCHLITZ BREWERY | | | SCAC4 |
| 10989 | STS | Servicos Auxiliaries de Transportes Aereos (SATA) | Founded in 1954. Ceased operations. | BR | AVCODES |
| 10990 | STS | Städtebahn Sachsen | | D | TRAFFIC |
| 10991 | STS | Städtebahn Sachsen GmbH | | DE | VKM |
| 10992 | STSB | STS | | | SCAC4 |
| 10993 | STSD | STS TRANSPORTATION SERVICES INC | | | SCAC4 |
| 10994 | STSG | STS LOGISTICAL SERVICES INC | | | SCAC4 |
| 10995 | STSH | STRAIGHT SHOT EXPRESS | | | SCAC4 |
| 10996 | STSLM | Siemens Transportation System Locomotives | | DE | VKM |
| 10997 | STSN | STS TRANSIT INC | | | SCAC4 |
| 10998 | STSO | ST SHIPPING TRANSPORT PTE LTD | | | SCAC4 |
| 10999 | STSP | SEMINOLE TRANSPORTATION SPECIALISTS | | | SCAC4 |
| 11000 | STSS | STANDARD TRANSPORTATION SERVICES | | | SCAC4 |
