| 1 | TYC | Transylvania International Airlines | Callsign: Transylvania, | RO | AVCODES |
| 2 | TYC | Tylerdale Connecting | 1/1980-7/2005 | | NAKINA |
| 3 | TYC | Tylerdale Connecting | 1/80-7/2000 | | NRHS |
| 4 | TYC | CSX TRANSPORTATION CORP. [(B&O) TYLERDALE CONNECTING RR.] | | | PWRC |
| 5 | TYC | Tylerdale Connecting | | | RSRV |
| 6 | TYCA | TAYLOR, C E OIL INC | | | SCAC4 |
| 7 | TYCC | TRANSPORT YVON CYR | | | SCAC4 |
| 8 | TYCD | TAYLOR, CECIL DELIVERY SERVICE INC | | | SCAC4 |
| 9 | TYCF | TARGET DELIVERY COMPANY INC | | | SCAC4 |
| 10 | TYCHY | Przedsiębiorstwa Komunikacji Miejskiej w Tychach | | PL | TRAFFIC |
| 11 | TYCI | TROY-COR INVESTMENTS LTD | | | SCAC4 |
| 12 | TYCL | TOTAL TRAC YUKON INC | | | SCAC4 |
| 13 | TYCM | TROY CONTAINER LINES | | | SCAC1 |
| 14 | TYCM | TROY CONTAINER LINE LTD | | | SCAC4 |
| 15 | TYCN | TYCOON TRUCKING | | | SCAC4 |
| 16 | TYCO | TERRY ENTERPRISES INC | | | SCAC4 |
| 17 | TYCR | TRANSPORTES Y CRUCES EGA | | | SCAC4 |
| 18 | TYCU | TOKUYAMA CHEMICALS (ZHEJIANG) CO.,LTD | | PRC | BIC |
| 19 | TYCU | YAMATO TRANSPORT CO LTD | | | SCAC4 |
| 20 | TYCY | TIDY COAST TRANSPORT LLC | | | SCAC4 |
