| 1 | STR | Stellair T.A. | Callsign: Stellair, | F | AVCODES |
| 2 | STR | Solitaire Air | ICAO Designaotr changed to FJR | JOR | AVCODES |
| 3 | STR | Sterna Linhas Aereas Ltda | Callsign: Sterna, Ceased operations in 2017. Name changed from Solitaire Lil - Tayran. | BR | AVCODES |
| 4 | STR | Red Star | | | ICAO1 |
| 5 | STR | Shawnee Terminal Ry. Co., Inc. | eliminated 7/1999; 7/2000-7/2005 | | NAKINA |
| 6 | STR | Shawnee Terminal Ry. Co., Inc. | eliminated 7/99; 7/2000 | | NRHS |
| 7 | STR | SHAWNEE TERMINAL RAILWAY COMPANY | | | PWRC |
| 8 | STR | Shawnee Terminal Railway | | | RSRV |
| 9 | STR | SHAWNEE TERMINAL RAILWAY COMPANY IN | | | SCAC4 |
| 10 | STR | Strukton Rail | | SE | VKM |
| 11 | STRA | STRAIGHT SHOT LOGISTICS INC | | | SCAC4 |
| 12 | STRA | Strabag AG | | AT | VKM |
| 13 | STRAG | Schöni Transport AG | | CH | VKM |
| 14 | STRAIL | Semitrailer | | | TRAFFIC |
| 15 | STRAN | Société des transports de l'agglomération nazairienne | City: Saint-Nazaire | F | TRAFFIC |
| 16 | STRB | SPEED TRANSPORTATION AIR FREIGHT | | | SCAC4 |
| 17 | STRC | Stuart Channel Transportation Ltd. | 1/1994 | | NAKINA |
| 18 | STRC | Stuart Channel Transportation Ltd. | Jan-94 | | NRHS |
| 19 | STRC | RETIRED 10-28-92 ATP [STUART CHANNEL TRANSPORTATION LTD.] | | | PWRC |
| 20 | STRC | Stuart Chemical Transportation | | | RSRV |
| 21 | STRC | SURE TRACK COURIER LTD | | | SCAC4 |
| 22 | STRCT | Strathcona County Transit | | CDN | TRAFFIC |
| 23 | STRD | | City: Dijon | F | TRAFFIC |
| 24 | STREK | Star Trek | | | TRAFFIC |
| 25 | STRF | STAR FREIGHT SOLUTIONS INC | | | SCAC4 |
| 26 | STRG | SOBANIA TRUCKING | | | SCAC4 |
| 27 | STRI | SPISAK TRUCKING & REPAIR INC | | | SCAC4 |
| 28 | STRJ | STAR TRANSPORTATION LLC | | | SCAC4 |
| 29 | STRK | STARKWEATHER FREIGHT LINES | | | SCAC1 |
| 30 | STRL | STRAITLINE TRANSPORTATION LLC | | | SCAC4 |
| 31 | STRM | STURM FREIGHTWAYS INC | | | PWRC |
| 32 | STRM | STARS TRANSPORTATION | | | SCAC4 |
| 33 | STRN | SALINAS TRUCKING | | | SCAC4 |
| 34 | STRO | SNIDER, TROY | | | SCAC4 |
| 35 | STRP | ST. REGIS PAPER CO. | | | PWRC |
| 36 | STRP | STAR PETROLEUM CO INC | | | SCAC4 |
| 37 | STRQ | STARLITE TRANSPORT | | | SCAC4 |
| 38 | STRS | SARAI TRUCKING | | | SCAC4 |
| 39 | STRSM | Société de transport de la Rive-Sud de Montréal | City: Longueuil (Quebec) | CDN | TRAFFIC |
| 40 | STRT | The Stewartstown R.R. Co. | 1/1975-7/2005 | | NAKINA |
| 41 | STRT | The Stewartstown R.R. Co. | 1/75-7/2000 | | NRHS |
| 42 | STRT | STEWARTSTOWN RAILROAD CO. | | | PWRC |
| 43 | STRT | Stewartstown Railroad | | | RSRV |
| 44 | STRT | The Stewartstown R.R. Co. | | USA | TRAFFIC |
| 45 | STRU | TOTE MARITIME PUERTO RICO | | USA | BIC |
| 46 | STRU | Sea Star Line | | | RSRV |
| 47 | STRU | SEA STAR LINE LLC | | | SCAC4 |
| 48 | STRU | Hans Strube Gleisbau, Hochbau Tiefbau GmbH | | DE | VKM |
| 49 | STRUKTON | | | NL | TRAFFIC |
| 50 | STRW | Southern Railway | | UK | VKM |
| 51 | STRX | Starlight Refining Co., Ltd. | 7/1937 | | NAKINA |
| 52 | STRX | St. Regis Paper Co. | added 1/1983; eliminated 5/1983 | | NAKINA |
| 53 | STRX | A.E. Staley Manufacturing Co. | added 4/1990; eliminated 1/1994 | | NAKINA |
| 54 | STRX | Trinity Industries Leasing Co. | added 1/1994-7/2005; eliminated 1/2007 | | NAKINA |
| 55 | STRX | St. Regis Paper Co. | added 1/83; eliminated 5/83 | | NRHS |
| 56 | STRX | A.E. Staley Manufacturing Co. | added 4/90; eliminated 1/94 | | NRHS |
| 57 | STRX | Trinity Industries Leasing Co. | added 1/94-7/2000 | | NRHS |
| 58 | STRX | *STARLIGHT REFINING CO., LTD. | | | PWRC |
| 59 | STRX | *STATE UNIVERSITY RAILROAD | | | PWRC |
| 60 | STRX | *(TILX) TRINITY INDUSTRIES LEASING CO. - ST REGIS PAPER CO. | | | PWRC |
| 61 | STRX | St. Regis Paper | | | RSRV |
| 62 | STRZ | STROH/SCHLITZ BREWERY | | | PWRC |
| 63 | STRZ | Stroh/Schlitz Brewery | | | RSRV |
| 64 | STRZ | STROH/SCHLITZ BREWERY | | | SCAC4 |
