| 8701 | TRRK | T R TRUCKING INC | | | SCAC4 |
| 8702 | TRRL | THIRD (3RD) ROCK LOGISTICS LLC | | | SCAC4 |
| 8703 | TRRO | TRANS REF ROMAN ROMAN | | | SCAC4 |
| 8704 | TRRP | TRANSPORT R C POIRIER | | | SCAC4 |
| 8705 | TRRQ | TRANSPORT ROUMAR INC | | | SCAC4 |
| 8706 | TRRR | TRANS RAPIDS RRR | | | SCAC4 |
| 8707 | TRRS | TRANS-TORRES CO | | | SCAC4 |
| 8708 | TRRT | TRI-R TRANSPORT LTD | | | SCAC4 |
| 8709 | TRRU | TRANSPORT RESOURCES INC. | | USA | BIC |
| 8710 | TRRU | Transport Resources | | | RSRV |
| 8711 | TRRU | TRANSPORT RESOURCES INC | | | SCAC4 |
| 8712 | TRRX | THREE RIVERS RAILWAY CO. (OUT OF OPERATION 01/94) | | | PWRC |
| 8713 | TRRY | Trillium Railway Co. Ltd. | added 1/2004; eliminated 4/2004; 7/2005 | | NAKINA |
| 8714 | TRRY | TRILLIUM RAILWAY CO. LTD. | | | PWRC |
| 8715 | TRRY | Trillium Railway | | | RSRV |
| 8716 | TRRY | TRILLIUM RAILWAY CO LTD | | | SCAC4 |
| 8717 | TRRZ | TRAP ROCK | | | PWRC |
| 8718 | TRS | AirTran Airways, Inc. | IATA: FL, Callsign: Citrus, IATA Prefix: 332, Fully integrated into Southwest Airlines on 28 December 2014. Commenced operations on 17 November 1997. ICAO designator changed from MTE. On September 27, 2010, Southwest Airlines announced they would acquire AirTran Airways. | USA | AVCODES |
| 8719 | TRS | AirTran Airways | IATA: FL | | ICAO1 |
| 8720 | TRS | TRINITES s.r.o. | | SK | VKM |
| 8721 | TRSB | TRI-STATE BUTANE CO INC | | | SCAC4 |
| 8722 | TRSC | TRANSPORTES SANCHEZ SANCHEZ SA DE C | | | SCAC4 |
| 8723 | TRSE | TRANSPORTES SALCEDO | | | SCAC4 |
| 8724 | TRSF | TRANSPORTATION SERVICES INC | | | SCAC4 |
| 8725 | TRSH | TRANSPORTES SA-RA | | | SCAC4 |
| 8726 | TRSL | TRAILER SHIP LINES INC | | | PWRC |
| 8727 | TRSL | TRANSOURCE LLC | | | SCAC4 |
| 8728 | TRSN | TRANSPORTES REASA | | | SCAC4 |
| 8729 | TRSO | TRANSPORTES LOPEZ | | | SCAC4 |
| 8730 | TRSOD | Transoda Sp. Z o.o. | | PL | VKM |
| 8731 | TRSQ | TERESI TRUCKING, INC | | | SCAC1 |
| 8732 | TRSQ | TERESI TRUCKING LLC | | | SCAC4 |
| 8733 | TRSR | TRANSIT SERVICES INC | | | SCAC4 |
| 8734 | TRSS | TRI-R SYSTEMS | | | SCAC4 |
| 8735 | TRST | TRI STATE OIL CO | | | SCAC4 |
| 8736 | TRSU | FEDERTRASPORTI SPA | | I | BIC |
| 8737 | TRSU | TRANSCONEX, INC. | | | PWRC |
| 8738 | TRSU | Transconex | | | RSRV |
| 8739 | TRSU | STS TRANSCHIMICA SRL | | | SCAC4 |
| 8740 | TRSV | TRANSERV INC | | | SCAC4 |
| 8741 | TRSW | TRUSWOOD INC | | | SCAC4 |
| 8742 | TRSX | Transrail Systems, Inc. | added 10/1969; 4/1970; eliminated 4/1972 | | NAKINA |
| 8743 | TRSX | California Tank Car Line, Inc. | added 4/1972; 1/1975-1/1980; eliminated 4/1981 | | NAKINA |
| 8744 | TRSX | North American Car Corp. | added 4/1981; eliminated 1/1984 | | NAKINA |
| 8745 | TRSX | General Electric Railcar Services Corp. | added 1/1984; eliminated 1/1986 | | NAKINA |
| 8746 | TRSX | Endasa, S.A. de C.V. | eliminated 4/1989; 1/1994 (not listed) | | NAKINA |
| 8747 | TRSX | Transrail Systems, Inc. | added 10/69; 4/70; eliminated 4/72 | | NRHS |
| 8748 | TRSX | California Tank Car Line, Inc. | added 4/72; 1/75-1/80; eliminated 4/81 | | NRHS |
| 8749 | TRSX | North American Car Corp. | added 4/81 | | NRHS |
| 8750 | TRSX | General Electric Railcar Services Corp. | eliminated 1/86 | | NRHS |
| 8751 | TRSX | Endasa, S.A. de C.V. | eliminated 4/89; 1/94 | | NRHS |
| 8752 | TRSX | *GENERAL ELECTRIC RAILCAR SERVICES CORP. [NORTH AMERICAN CAR CORP.; CALIFORNIA TANK CAR LINE, INC.; TRANSRAIL SYSTEMS, INC.] | | | PWRC |
| 8753 | TRSX | *(ENDX) ENDASA SA DE CV | | | PWRC |
| 8754 | TRSX | *TEXAS RAILROAD SWITCHING | | | PWRC |
| 8755 | TRSX | Transrail Systems (GE Rail Services) | | | RSRV |
| 8756 | TRSZ | TRIPLE CROWN SERVICE | | | PWRC |
| 8757 | TRT | Trans Arabian Air Transport | Callsign: Trans Arabian, | SUD | AVCODES |
| 8758 | TRT | Trans Arabian Air Transport | | | ICAO1 |
| 8759 | TRT | TSHIUETIN RAIL TRANSPORTATION | | | PWRC |
| 8760 | TRT | Tianjin Rail Transit Group Co. | | PRC | TRAFFIC |
| 8761 | TRTB | TRANSPORT SERVICES LLC | | | SCAC4 |
| 8762 | TRTB | Tees-side Railless Traction Board | | GB | TRAFFIC |
| 8763 | TRTC | TRT INTERNATIONAL LTD | | | SCAC4 |
| 8764 | TRTC | | City: Taipei | RC | TRAFFIC |
| 8765 | TRTH | TRANSPORT ROGER THIBAULT INC | | | SCAC4 |
| 8766 | TRTI | TR TRUCKING INC | | | SCAC4 |
| 8767 | TRTJ | TRIPLE R TRUCKING OF LAURENS IOWA I | | | SCAC4 |
| 8768 | TRTL | TRANSPORTES Y SERVICIOS EL TROCADER | | | SCAC4 |
| 8769 | TRTM | TRANSPORTES MOR S A DE C V | | | SCAC4 |
| 8770 | TRTO | TRUCK & TRAIN TRANSPORT CO | | | SCAC4 |
| 8771 | TRTR | Trieste Transporti | | I | TRAFFIC |
| 8772 | TRTR | Tracona Trading | | SE | VKM |
| 8773 | TRTS | TRILOGY TRANSPORTATION SERVICES INC | | | SCAC4 |
| 8774 | TRTT | TRIPLE T TRUCKING | | | SCAC4 |
| 8775 | TRTU | CARU CONTAINERS BV | | NL | BIC |
| 8776 | TRTU | CONTAINER ASSOCIATION ROTTERDAM BV | | | SCAC4 |
| 8777 | TRTUR | TRANSTUR ULUSLARARASI NAKLİYAT VE TİCARET A.Ş | | TR | VKM |
| 8778 | TRTX | W.J. Kirberger, Trustee | added 10/1980; 1/1994; eliminated 7/1994; 7/2000-7/2005 (not listed) | | NAKINA |
| 8779 | TRTX | W.J. Kirberger, Trustee | added 10/80; 1/94; eliminated 7/94; 7/2000 | | NRHS |
| 8780 | TRTX | W. J. KIRBERGER, TRUSTEE | | | PWRC |
| 8781 | TRTX | W. J. Kirberger | | | RSRV |
| 8782 | TRTX | W J KIRBERGER TRUSTEE | | | SCAC4 |
| 8783 | TRU | Triangle Airline (Uganda) Ltd. | Callsign: Tri Air, | EAU | AVCODES |
| 8784 | TRU | Triangle Airline (Uganda) | | | ICAO1 |
| 8785 | TRUAX | Truax-Traer Coal Co. | | USA | TRAFFIC |
| 8786 | TRUB | T R U HOLDINGS INC | | | SCAC4 |
| 8787 | TRUC | TRU-DIE LIMITED | | | SCAC4 |
| 8788 | TRUD | TRIUS INC | | | SCAC4 |
| 8789 | TRUH | TRIUMPH LOGISTICS INC | | | SCAC4 |
| 8790 | TRUI | TRANS UNITED INC | | | SCAC4 |
| 8791 | TRUL | TRUCKING UNLIMITED | | | SCAC1 |
| 8792 | TRUM | TRIUMPH LINK LOGISTICS LTD | | | SCAC4 |
| 8793 | TRUN | TEAM RUNNERS LOGISTICS | | | SCAC4 |
| 8794 | TRUQ | TRANSPORT RUSH INC | | | SCAC4 |
| 8795 | TRUS | TRUST SERVICES INC | | | SCAC4 |
| 8796 | TRUST | Trustline | | GB | TRAFFIC |
| 8797 | TRUU | TRISTAR ENGINNERING CONSULTING LOGISTIC SA | | CH | BIC |
| 8798 | TRUX | Midwest Bottle Gas Co. | added 1/1978; 1/1980-7/2005; eliminated 7/2007 | | NAKINA |
| 8799 | TRUX | Midwest Bottle Gas Co. | added 1/78; 1/80-7/2000 | | NRHS |
| 8800 | TRUX | MIDWEST BOTTLE GAS COMPANY | | | PWRC |
