| 1 | TSC | Air Transat | IATA: TS, Callsign: Transat, IATA Prefix: 649, | CDN | AVCODES |
| 2 | TSC | Air Transat | IATA: TS | | ICAO1 |
| 3 | TSC | TULSA-SAPULPA UNION RAILWAY CO. | | | PWRC |
| 4 | TSCA | TRELLES CONTRERAS, ANA OLAYA | | | SCAC4 |
| 5 | TSCC | TRANSPORT CONSOLIDATION CORP | | | SCAC4 |
| 6 | TSCD | TRI-STATE COMMODITIES INC | | | SCAC4 |
| 7 | TSCF | TRANSPORTES CRUZ CHAVEZ FERNANDEZ | | | SCAC4 |
| 8 | TSCG | TRI-STAR CARGO INC. | | | SCAC4 |
| 9 | TSCH | TSCHUDI SHIPPING COMPANY | | | SCAC4 |
| 10 | TSCI | T.S. EXPEDITING SERVICES, INC. | | | SCAC1 |
| 11 | TSCI | T S EXPEDITING SERVICES INC | | | SCAC4 |
| 12 | TSCL | TYNE SHIPPING COMPANY LIMITED CYPRU | | | SCAC4 |
| 13 | TSCM | TRAILER SERVICE CO INC | | | SCAC4 |
| 14 | TSCN | TRANSCON INC | | | SCAC4 |
| 15 | TSCO | TEXAS TRANSPORT & TERMINAL CO INC | | | PWRC |
| 16 | TSCO | TSC MOVING & STORAGE LTD | | | SCAC4 |
| 17 | TSCR | TEXAS STERLING CONSTUCTION | | | SCAC4 |
| 18 | TSCS | TSC NURSERY SALES LIMITED | | | SCAC4 |
| 19 | TSCT | TRANS COURIER SYSTEMS LLC II | | | SCAC4 |
| 20 | TSCU | TRANS-SERVICE-1 LLC | | UA | BIC |
| 21 | TSCU | THOMPSON SHIPPING CO. | | | SCAC1 |
| 22 | TSCU | TRULSEN SCHIFFAHRT GMBH | | | SCAC4 |
| 23 | TSCW | TROPICAL SHIPPING COMPANY | | | PWRC |
| 24 | TSCW | TROPICAL SHIPPING & CONSTRUCTION CO | | | SCAC1 |
| 25 | TSCW | TROPICAL SHIPPING & CONSTRUCTION CO | | | SCAC4 |
| 26 | TSCX | The Steel Company of Canada, Ltd. | 7/1935-10/1966; eliminated 10/1969 | | NAKINA |
| 27 | TSCX | The Steel Company of Canada, Ltd. | 4/38-10/66; eliminated 10/69 | | NRHS |
| 28 | TSCX | *STEEL COMPANY OF CANADA, LTD. | | | PWRC |
| 29 | TSCX | *RETIRED 08-15-91 ATP (0990) | | | PWRC |
| 30 | TSCY | TAMAI STEAMSHIP COMPANY LTD | | | SCAC4 |
