List of reporting marks: T

T

 * TACX - Transport Arts Corporation
 * TAEA - Tangipahoa and Eastern
 * TAG - Tennessee, Alabama and Georgia Railway; Southern Railway; Norfolk Southern Railway
 * TANX - Transitank Car Leasing Corporation
 * TARX - Sandersville Leasing
 * TASD - Terminal Railway Alabama State Docks
 * TATX - Tanco Transportation Corporation
 * TBCX - The Boeing Company
 * TBOX - TTX Company
 * TBRY - Thermal Belt Railway
 * TBV - Trinity and Brazos Valley Railway
 * TC - Tennessee Central Railroad, Temple and Texas Central Railroad
 * TCAX - Transportation Corporation of America
 * TCB - Texas Central Business Lines
 * TCBR - Tecumseh Branch Connecting Railroad
 * TCBX - AIG Rail Services
 * TCCX - TCCX Corporation
 * TCDX - Tennessee Chemical Company
 * TCGB - Tucson, Cornelia and Gila Bend Railroad
 * TCGX - Tri-County Gas
 * TCIX - Trinity Chemical Leasing
 * TCKR - Turtle Creek Industrial Railroad
 * TCL - Twin City Lines
 * TCLX - Trinity Chemical Leasing
 * TCMX - Transportation Company of America
 * TCRT - Twin City Rapid Transit Company
 * TCRY - Tri-City Railroad
 * TCStL - Toledo, Cincinnati and St Louis Railroad
 * TCSX - Tank Car Services, Inc.
 * TCSZ - Triple Crown Service
 * TCT - Texas City Terminal Railway
 * TCWR - Twin Cities and Western Railroad
 * TCX - General American Transportation Corporation
 * TDB - Toledo, Delphos and Burlington Railroad
 * TE - Tacoma Eastern Railway
 * TECX - Texas Crushed Stone Company
 * TECO - Teamo-Tacoma Railroad; Lincoln Pacific Railway
 * TEIX - Transportation Equipment, Inc.
 * TELX - Penwalt Carriers Corporation; ELF Atochem North America
 * TEM - Temiskaming and Northern Ontario
 * TEMX - Temple-Eastex
 * TENN - Tennessee Railway
 * TER - Texas & Eastern Railroad, Texas Electric Railway
 * TEXC - Texas Central Railroad
 * TFM - Grupo Transportación Ferroviaria Mexicana
 * TFS - Texarkana and Fort Smith Railway; Kansas City Southern Railway
 * TG - Tonopah and Goldfield Railroad, Tremont and Gulf Railway
 * TGAX - Texasgulf
 * TGCX - PolyOne Company
 * TGIX - Texasgulf; PCS Phosphate Company
 * TGOX - US Rail Services
 * TGPX - Tamak Transportation Corporation
 * TGSX - Texasgulf; Tg Soda Ash
 * THB - Toronto, Hamilton and Buffalo Railway; Canadian Pacific Railway
 * THR - Thunder Rail
 * THRX - Transportation Company of America
 * THSX - New York, Susquehanna, & Western Technical and Historical Society
 * TI - Turners Island, LLC
 * TIBR - Timber Rock Railroad
 * TILX - Trinity Industries Leasing
 * TIMX - Trinity Industries Leasing
 * TIPP - Tippecanoe Railway
 * TIRL - Tonawanda Island Railroad
 * TJRX - S. M. Brooks Company
 * TKCX - Thiele Kaolin Company
 * TKEN - Tennken Railroad
 * TLCX - Pullman Leasing Company
 * TLDX - Pullman Leasing Company; General Electric Rail Services
 * TLTX - Tilcon-Tomasso Construction
 * TM  - Texas Midland Railroad, Texas Mexican Railway; Kansas City Southern Railway
 * TMAX - Tennessee River Pulp and Paper Company
 * TMBL - Tacoma Municipal Belt Line Railway
 * TMER&L - The Milwaukee Electric Railway & Light Company
 * TMLX - Thunder Mountain Line
 * TMO - Vitebsk Seaway and Continental Railway; Lincoln Pacific Railway
 * TMPX - Texas Municipal Power Agency
 * TMSS - Towanda-Monroeton Shippers Lifeline, Inc.
 * TMT - Trailer Marine Transportation Corporation
 * TMTC - Tri-County Metropolitan Transit District of Oregon
 * TN  - Texas and Northern Railway
 * TNCX - North American Car Corp.; General Electric Railcar Services Corp.; General Electric Rail Services Corp. (Lessee: Nestlé)
 * TNER - Texas Northeastern Railroad
 * TNHR - Three Notch Railroad
 * TNM - Texas - New Mexico Railway
 * TNMR - Texas-New Mexico Railroad; Austin and Northwestern Railroad
 * TNO - Texas and New Orleans Railroad; Southern Pacific Railroad; Union Pacific Railroad
 * TNSR - Nashtown and Southern Railroad; Lorraine, Eastern and Pacific Railroad;
 * TNVR - Tennessee Valley Railroad Museum
 * TNW - Toledo and Northwestern Railroad; Chicago and Northwestern Railway
 * TOC - Conrail
 * TOE - Texas, Oklahoma and Eastern Railroad
 * TOV - Tooele Valley Railway
 * TP  - Texas & Pacific Railway; Missouri Pacific Railroad; Union Pacific Railroad
 * TPBX - General American Transportation Corporation
 * TPCX - The Purdy Company
 * TPFX - General Electric Rail Services
 * TPIX - Tropicana Products; PepsiCo
 * TPOC - Tulsa Port of Catoosa
 * TPPX - Thilmany
 * TPRX - Texas Power and Light Company
 * TPT - Conrail
 * TPTX - Trailer Train Company
 * TPW - Toledo, Peoria & Western Railway; Atchison, Topeka & Santa Fe Railway; BNSF
 * TQEX - First Union Rail
 * TR  - Tomahawk Railway
 * TRAX - RailTex
 * TRBX - Timken Roller Bearing Company
 * TRC - Trona Railway
 * TRCX - Tri-Rail
 * TRE - Trinity Railway Express
 * TRGX - Terminal Grain Corporation
 * TRIN - Trinidad Railway
 * TRIX - Midwest Energy Services Company
 * TRLX - Texas Railcar Leasing Company
 * TRMW - Tacoma Rail
 * TRMX - TRM Industries
 * TRNX - General Electric Rail Services
 * TRPX - Tropigas
 * TRR - Torch River Rail
 * TRRA - Terminal Railroad Association of St Louis
 * TRRY - Trillium Railway
 * TRSX - General Electric Rail Services
 * TRTX - W. J. Kirberger, Trustee
 * TRUX - Midwest Bottle Gas Company
 * TRYX - Tri-County Cooperative Association
 * TS  - Tidewater Southern Railway
 * TSBY - Tuscola & Saginaw Bay Railway
 * TSE - Texas South-Eastern Railroad
 * TSH - Tshiuetin Rail Transportation
 * TSO - Tidewater Southern Railway
 * TSPX - Texas Sulphur Products Company
 * TSR - Texas State Railroad
 * TSRD - Twin State Railroad
 * TSRR - Tennessee Southern Railroad
 * TStLW - Toledo, St Louis & Western Railroad
 * TSU - Tulsa-Sapulpa Union Railway
 * T&T - Tama and Toledo Railroad
 * TT - Toledo Terminal Railroad, Tonopah & Tidewater Railroad
 * TTAX - TTX Company
 * TTBX - TTX Company
 * TTCX - TTX Company
 * TTDX - TTX Company
 * TTER - Tomiko Tilden & Eastern Railway
 * TTEX - TTX Company
 * TTFX - TTX Company
 * TTGX - TTX Company
 * TTHX - TTX Company
 * TTIS - Transkentucky Transportation Railroad
 * TTIX - TTX Company
 * TTJX - TTX Company
 * TTKX - TTX Company
 * TTLX - TTX Company
 * TTMX - TTX Company
 * TTNX - TTX Company
 * TTOX - TTX Company
 * TTPX - TTX Company
 * TTQX - TTX Company
 * TTR - Tijuana and Tecate Railway; Talleyrand Terminal Railroad
 * TTRX - TTX Company
 * TTSX - TTX Company
 * TTTX - TTX Company
 * TTUX - TTX Company
 * TTVX - TTX Company
 * TTWX - TTX Company
 * TTX - TTX Company
 * TTXX - TTX Company
 * TTYX - TTX Company
 * TTZX - TTX Company
 * TUGX - Texas Utilities Generating Company
 * TUST - Texarkana Union Station Trust
 * TVAX - Tennessee Valley Authority
 * TVRM - Tennessee Valley Railroad Museum
 * TVRR - Tulare Valley Railroad, Tanana Valley Railroad
 * TWGX - Tidewater Grain Company
 * TWRY - Tradewater Railway
 * TXIX - Texas Industries
 * TXN - Texas & New Mexico Railway
 * TXNW - Texas North Western Railway
 * TXOR - Texas and Oklahoma Railroad
 * TXPF - Texas Pacifico Transportation
 * TXR - Texas Rock Crusher Railroad
 * TXRC - Texas Export Railroad
 * TXTC - Texas Transportation Company
 * TXTX - Econo-Rail Corporation
 * TYBR - Tyburn Railroad
 * TYC - Tylerdale Connecting
 * TYNT - Tyner Terminal Railroad
 * TZPR - Tazewell & Peoria Railroad