| 1 | ST | Germania Fluggesellschaft mbH | ICAO: GMI, Callsign: Germania, Ceased operations on 05 February 2019. ICAO designator changed from GFG. Founded in 1986. | D | AVCODES |
| 2 | ST | Yanda Airlines | Designator changed to YE. Formerly Singleton Air Serivces | AUS | AVCODES |
| 3 | ST | Société de Transports Aériens en Extrême-Orient | | VN | AVCODES |
| 4 | ST | Western Aircraft, Inc. | ICAO: STT, Callsign: Sawtooth, | USA | AVCODES |
| 5 | ST | Air Thanlwin Holding Company Limited | ICAO: AYG, Callsign: Royal Bird, Name changed from Yangon Airways Limited in February 2014. IATA Designator changed from YH*. ICAO designator changed to RTL. IATA designator changed from HK* w.e.f. 15 June 2009. | MYA | AVCODES |
| 6 | ST | Air Thanlwin Holding Company Limited | ICAO: RTL, Callsign: Royal Bird, Name changed from Yangon Airways Limited in February 2014. IATA Designator changed from YH*. ICAO designator changed from AYG. IATA designator changed from HK* w.e.f. 15 June 2009. | MYA | AVCODES |
| 7 | ST | Springfield Terminal Ry. Co. (Vermont) | 1/1975-1/1980; eliminated 4/1985 | | NAKINA |
| 8 | ST | Springfield Terminal Ry. Co. (MA) | added 4/1985; eliminated 10/1987 | | NAKINA |
| 9 | ST | Springfield Terminal Ry. Co. (NH) | added 10/1987 | | NAKINA |
| 10 | ST | Springfield Terminal Ry. Co. | 1/1994 | | NAKINA |
| 11 | ST | Springfield Terminal Ry. Co. (NH) | eliminated 10/1997 | | NAKINA |
| 12 | ST | ST Rail System | 7/2000-7/2005 | | NAKINA |
| 13 | ST | Springfield Terminal Ry. Co. (Vermont) | 1/75-1/80; eliminated 4/85 | | NRHS |
| 14 | ST | Springfield Terminal Ry. Co. (MA) | added 4/85; eliminated 10/87 | | NRHS |
| 15 | ST | Springfield Terminal Ry. Co. (NH) | added 10/87 | | NRHS |
| 16 | ST | Springfield Terminal Ry. Co. | Jan-94 | | NRHS |
| 17 | ST | Springfield Terminal Ry. Co. (NH) | eliminated 10/97 | | NRHS |
| 18 | ST | ST Rail System | Jul-00 | | NRHS |
| 19 | ST | *GUILFORD RAIL SYSTEM [SPRINGFIELD TERMINAL RAILWAY] | | | PWRC |
| 20 | ST | +ST RAIL SYSTEM | | | PWRC |
| 21 | ST | Springfield Terminal Railway (Pan Am Railways) | | | RSRV |
| 22 | ST | ST RAIL SYSTEM | | | SCAC4 |
| 23 | ST | Sydtåg | 1991 - 1997 | S | svenska-lok.se |
| 24 | ST | Sursee-Triengen-Bahn | | CH | TRAFFIC |
| 25 | ST | Sursee-Triengen Bahn AG | | CH | VKM |
| 26 | STA | Star Aviation | Callsign: Star, | GB | AVCODES |
| 27 | STA | Star Aviation | | | ICAO1 |
| 28 | STA | National Rail Corporation - SeaTrain | | AUS | TRAFFIC |
| 29 | STA | Stahlberg Track Asset GmbH & Co. KG | | DE | VKM |
| 30 | STAA | ST AMANT, ROSARIO | | | SCAC4 |
| 31 | STAB | STAVANGER BAY KS | | | SCAC4 |
| 32 | STAB | Svensk Tågkraft AB | 2004 - | S | svenska-lok.se |
| 33 | STAB | Svensk Tågkraft AB | 2004 - | S | TRAFFIC |
| 34 | STAB | Svensk Tågkraft AB | | SE | VKM |
| 35 | STAC | STAR MOVING & STORAGE INC | | | SCAC4 |
| 36 | STAC | Service de transport de l’agglomération chambérienne | City: Chambéry | F | TRAFFIC |
| 37 | STAD | STANDARDEX LLC | | | SCAC4 |
| 38 | STAE | ST AGUEDA TRANSP SERVS | | | SCAC4 |
| 39 | STAG | Stadler Rail | | CH | TRAFFIC |
| 40 | STAG | Stadler Bussnang AG | | CH | VKM |
| 41 | STAGC | Stagecarriage | | GB | TRAFFIC |
| 42 | STAI | STALLARD INC | | | SCAC4 |
| 43 | STAK | STAR TRUCKING INC | | | SCAC4 |
| 44 | STAL | STALLWORTH TRUCKING INC | | | SCAC4 |
| 45 | STAL | Siemens Transformers Austria GmbH & Co KG | | AT | VKM |
| 46 | STAO | STANDARD TOOL | | | SCAC4 |
| 47 | STAP | STAR 2000 TRUCK LINES | | | SCAC4 |
| 48 | STAP | Stadler Pankow GmbH | | DE | VKM |
| 49 | STAR | STAR, A A, TRANSFER CO. | | | PWRC |
| 50 | STAR | Stichting Stadskanaal Rail | | NL | TRAFFIC |
| 51 | STARP | Aerolíneas Star Perú S.A. | | PE | TRAFFIC |
| 52 | STARR | STARR | | US-NJ | TRAFFIC |
| 53 | START | MÁV-START ZRt. | | HU | VKM |
| 54 | STAS | | City: St. Etienne | F | TRAFFIC |
| 55 | STAT | STAATS EXPRESS, INC | | | SCAC1 |
| 56 | STAT | St. Albert Transit | | CDN | TRAFFIC |
| 57 | STAU | {JSC "Russian Container Company"};ZIPCODE=123112 | | RUS | BIC |
| 58 | STAU | STAR SHIPPING A NORWAY | | | PWRC |
| 59 | STAU | Star Shipping A Norway | | | RSRV |
| 60 | STAU | STAR SHIPPING A/S | | | SCAC1 |
| 61 | STAUB | STAUB& CO Chemiehandelsgesellschaft mbH | | DE | VKM |
| 62 | STAV | STAV GmbH | | DE | VKM |
| 63 | STAX | Stauffer Chemical Co. (Northern California Branch) | 7/1930-7/1935 | | NAKINA |
| 64 | STAX | Stauffer Chemical Co. — Northern California Branch | 7/1937-7/1954; eliminated 7/1956 | | NAKINA |
| 65 | STAX | Stauffer Chemical Co. (Western Branch) | added 7/1956; 10/1957-1/1975 | | NAKINA |
| 66 | STAX | Stauffer Chemical Co. | 1/1980; eliminated 4/1990 | | NAKINA |
| 67 | STAX | Rhone-Poulenc Basic Chemicals Co. | added 4/1990; 1/1994; eliminated 7/1996 | | NAKINA |
| 68 | STAX | OCI Chemical Corp. | added 7/1996; 7/2000-7/2005 | | NAKINA |
| 69 | STAX | Stauffer Chemical Co. -- Northern California Branch | 4/38-1/52; eliminated 7/56 | | NRHS |
| 70 | STAX | Stauffer Chemical Co. (Western Branch) | added 7/56; 10/57-1/75 | | NRHS |
| 71 | STAX | Stauffer Chemical Co. | 1/80; eliminated 4/90 | | NRHS |
| 72 | STAX | Rhone-Poulenc Basic Chemicals Co. | added 4/90; 1/94; eliminated 7/96 | | NRHS |
| 73 | STAX | OCI Chemical Corp. | added 7/96; 7/2000 | | NRHS |
| 74 | STAX | OCI CHEMICAL CORPORATION [(RPBX) RHONE-POULENC BASIC CHEMICALS CO.; STAUFFER CHEMICAL CO.] | | | PWRC |
| 75 | STAX | Stauffer Chemical (OCI Chemical Corporation) | | | RSRV |
| 76 | STAZT | Trolleybusni Prevoz Stara Zagora | | BG | TRAFFIC |
| 77 | STB | Staero Ltd. | Callsign: Staero, | RUS | AVCODES |
| 78 | STB | Star Airways sh.p.k | IATA: 4S, | AL | AVCODES |
| 79 | STB | St Barth Executive | Callsign: Sea Barth, | BLM | AVCODES |
| 80 | STB | Status-Alpha Airline | | | ICAO1 |
| 81 | STB | Süd Thüringen Bahn GmbH | Meiningen | D | privat-bahn.de |
| 82 | STB | Seetalbahn | | CH | TRAFFIC |
| 83 | STB | Süd-Thüringen Bahn | | DE | VKM |
| 84 | STBA | SANTA BARBARA AIRBUS | | | SCAC4 |
| 85 | STBAT | Steiermarkbahn Transport & Logistik GmbH | | AT | VKM |
| 86 | STBC | STUBBLEFIELD COMPANY | | | SCAC4 |
| 87 | STBE | SIMS CAB DEPOT | | | SCAC4 |
| 88 | STBE | Süd-Thüringen Bahn | Real: STB, a subsidiary of the Erfurter Industriebahn | D | TRAFFIC |
| 89 | STBH | SELLERS TRANSPORTATION INC | | | SCAC4 |
| 90 | STBI | STONINGTON GALLERY INC | | | SCAC4 |
| 91 | STBL | SPARTAN TRANSPORT NATIONWIDE LLC | | | SCAC4 |
| 92 | STBN | SCOTT & BEARSKIN | | | PWRC |
| 93 | STBO | STONE, BOB | | | SCAC4 |
| 94 | STBQ | S T BROS | | | SCAC4 |
| 95 | STBR | Stadtwerke Bad Reichenhall | | D | TRAFFIC |
| 96 | STBS | ST-BASILE TRANSPORT INC (DIV OF CIM | | | SCAC4 |
| 97 | STBU | STOLT TANK CONTAINERS LEASING LTD | | BM | BIC |
| 98 | STBU | STOLT TANK CONTAINERS LEASING LTD | | | SCAC4 |
| 99 | STBV | STUBBS, KEVIN TRUCKING INC | | | SCAC4 |
| 100 | STBY | SCROGGINS TRUCKING | | | SCAC4 |
