| 1 | SRT | Aircompany Trans Asian Airlines | IATA: T7, Callsign: Traser, Ceased operations during 1999. | KZ | AVCODES |
| 2 | SRT | Trans Asian Airlines | | | ICAO1 |
| 3 | SRT | State Railway of Thailand | | T | TRAFFIC |
| 4 | SRTAG | Swiss Rail Traffic AG | | CH | VKM |
| 5 | SRTC | SANANNAH RIVER TERMINAL CO. | | | PWRC |
| 6 | SRTC | SOLAR TECHNOLOGY INC | | | SCAC4 |
| 7 | SRTD | SPECIALTY ROAD TRANSPORT INC | | | SCAC4 |
| 8 | SRTD | Sacramento Regional Transit District | | USA | TRAFFIC |
| 9 | SRTK | SHORE TRUCKING COMPANY INC | | | SCAC4 |
| 10 | SRTL | S & R TRUCKING | | | SCAC4 |
| 11 | SRTN | SAN RAMON TRANSPORTES | | | SCAC4 |
| 12 | SRTP | SMITH, REX TRANSPORTATION INC | | | SCAC4 |
| 13 | SRTR | SMITH RUTHERFORD TRANSPORT INC | | | SCAC4 |
| 14 | SRTR | Swiss Rail Traffic | Real: SRT | CH | TRAFFIC |
| 15 | SRTT | STEEL ROSE TRUCKING | | | SCAC4 |
| 16 | SRTU | SE.TRA.S. SRL | | I | BIC |
| 17 | SRTU | SURFACE TRANSPORTATION | | | SCAC1 |
| 18 | SRTU | SE TRA S SRL | | | SCAC4 |
| 19 | SRTW | SIERRA TOWING | | | SCAC4 |
| 20 | SRTX | Southwind Rail Travel Ltd. | 7/2000-7/2005 (not listed) | | NAKINA |
| 21 | SRTX | Southwind Rail Travel Ltd. | Jul-00 | | NRHS |
| 22 | SRTX | SOUTHWIND RAIL TRAVEL LTD. | | | PWRC |
| 23 | SRTX | Southwind Rail Travel Limited | | | RSRV |
| 24 | SRTX | SOUTHWIND RAIL TRAVEL LTD | | | SCAC4 |
| 25 | SRTY | SHERIDAN TRANSPORTATION SYSTEMS INC | | | SCAC4 |
