| 1 | TTS | Transporte Aereo Techico Ejecutivo, S.A. de C.V. | Callsign: Tecnico, | MEX | AVCODES |
| 2 | TTS | T.A.S.D. (Transporti Aerei Speciali) | | I | AVCODES |
| 3 | TTS | Transporte Aereo Tecnico Ejecutivo | | | ICAO1 |
| 4 | TTS | TRANSPORT TRADE SERVICES SA | | RO | VKM |
| 5 | TTSA | TRANSPORTADORA TAURUS S A DE C V | | | SCAC4 |
| 6 | TTSC | TRANSPORTES SICA | | | SCAC4 |
| 7 | TTSE | TRANSPORTES SERRANO | | | SCAC4 |
| 8 | TTSF | TRAILER TRANSFER SERVICE INC | | | SCAC4 |
| 9 | TTSH | TOTAL SHIPPING LINE CORP | | | SCAC4 |
| 10 | TTSJ | TTS | | | SCAC4 |
| 11 | TTSL | TTMI SARL | | | SCAC4 |
| 12 | TTSM | TAMEZ TREVINO, SAMUEL | | | SCAC4 |
| 13 | TTSO | TRANSPORT S R O INC | | | SCAC4 |
| 14 | TTSPA | Trentino Transporti | | I | TRAFFIC |
| 15 | TTSQ | TRI STATE DRAYAGE LLC | | | SCAC4 |
| 16 | TTSS | TOTAL SERVICES INC | | | SCAC4 |
| 17 | TTST | TORUS TRAFFIC SYSTEMS LTD | | | SCAC4 |
| 18 | TTSU | LLC TRADETRANS | | RUS | BIC |
| 19 | TTSV | TEMPLE TRUCKING SERVICE | | | SCAC4 |
| 20 | TTSW | TECHNI-LITE SYSTEMS INC | | | SCAC4 |
| 21 | TTSX | Trailer Train Co. | 4/1970; added 1/1974; 1/1975-1/1980; eliminated 1/1992 | | NAKINA |
| 22 | TTSX | TTX Co. | added 1/1992; 1/1994-7/2005 | | NAKINA |
| 23 | TTSX | Trailer Train Co. | 4/1970; added 1/1974 | | NAKINA |
| 24 | TTSX | Trailer Train Co. (flat cars, equipped with Stac-Pac superstructure furnished by participant railroads) | 1/1975 | | NAKINA |
| 25 | TTSX | Trailer Train Co./TTX Co. (flat cars equipped with coverless enclosed bi-level furnished by participant railroads) | 1/1980-7/2000 | | NAKINA |
| 26 | TTSX | Trailer Train Co. | 4/70; added 1/74 | | NRHS |
| 27 | TTSX | Trailer Train Co. (flat cars, equipped with Stac-Pac superstructure furnished by participant railroads) | Jan-75 | | NRHS |
| 28 | TTSX | Trailer Train Co. (flat cars equipped with coverless enclosed bi-level furnished by participant railroads) | 1/80; eliminated 1/92 | | NRHS |
| 29 | TTSX | TTX Co. (flat cars equipped with coverless enclosed bi-level furnished by participant railroads) | added 1/92; 1/94-7/2000 | | NRHS |
| 30 | TTSX | TTX COMPANY {TRAILER TRAIN COMPANY} | | | PWRC |
| 31 | TTSX | Trailer Train (TTX Corporation) | | | RSRV |
| 32 | TTSX | TTX COMPANY | | | SCAC4 |
| 33 | TTSZ | TRITON TRANSPORT SERVICES | | | PWRC |
| 34 | TTSZ | Triton Transport Services | | | RSRV |
| 35 | TTSZ | TRITON TRANSPORT SERVICES | | | SCAC4 |
