| 2101 | TCUI | TRADER CONSTRUCTION CO | | | SCAC3 |
| 2102 | TCUK | TC TRUCKING | | | SCAC4 |
| 2103 | TCUL | TRANS CONSULTANT | | | SCAC3 |
| 2104 | TCUL | TRIPLE C TRANSPORT OF BROWNSVILLE I | | | SCAC4 |
| 2105 | TCUN | TRANSPORT CONSULTANTS INTERNATIONAL | | | SCAC4 |
| 2106 | TCUO | TRANSCOLD DISTRIBUTION LTD | | | SCAC4 |
| 2107 | TCUQ | TC AUTO TRANSPORT INC | | | SCAC4 |
| 2108 | TCUR | TOTAL COURIER | | | SCAC3 |
| 2109 | TCUT | TRI COUNTY TRUCK TRANSPORTATION | | | SCAC3 |
| 2110 | TCUT | TRI COUNTY TRUCK TRANSPORTATION | | | SCAC4 |
| 2111 | TCUU | TRIFLEET LEASING HOLDING B.V. | | NL | BIC |
| 2112 | TCUU | TRANS CONTAINER LEASING AG | | | SCAC3 |
| 2113 | TCV | Transportes Aereos de Cabo Verde (TACV) | IATA: VR, Callsign: Caboverbe, IATA Prefix: 696, Name changed to Transportes Aereos de Cabo Verde (TACV) d/b/a Cabo Verde Airlines in May 2018. Designator VR reinstated by IATA | CV | AVCODES |
| 2114 | TCV | Transportes Aereos de Cabo Verde (TACV) d/b/a Cabo Verde Airlines | IATA: VR, Callsign: Caboverbe, IATA Prefix: 696, Name changed from Transportes Aereos de Cabo Verde (TACV) in May 2018. Designator VR reinstated by IATA | CV | AVCODES |
| 2115 | TCV | TACV | IATA: VR | | ICAO1 |
| 2116 | TCV | Cabo Verde Airlines | | CV | TRAFFIC |
| 2117 | TCVA | TRANSPORTES CAVAZOS ARREDONDO SA DE | | | SCAC4 |
| 2118 | TCVC | TELCO SERVICES INC | | | SCAC3 |
| 2119 | TCVD | TCN INTERNACIONAL SA DE CV | | | SCAC4 |
| 2120 | TCVG | TRANSAM CARREIRS INC | | | SCAC4 |
| 2121 | TCVH | TRANSPORTES CHAVEZ | | | SCAC4 |
| 2122 | TCVI | TECHNOLOGY VENTURES INCORPORATED | | | SCAC4 |
| 2123 | TCVM | TSAKOS COLUMBIA | | | SCAC4 |
| 2124 | TCVN | TOKEN CREEK MOBILE TELEVISION INC | | | SCAC4 |
| 2125 | TCVO | TRANSPORTES CHUVIALCO S A DE C V | | | SCAC4 |
| 2126 | TCVU | TWS TANKCONTAINER-LEASING GMBH & CO KG | | D | BIC |
| 2127 | TCVU | VEB DEURTRANS TRANSCONTAINER | | | SCAC3 |
| 2128 | TCVU | TWS TRANSPORTMITTEL VERMIETUNG GMBH | | | SCAC4 |
| 2129 | TCVV | TCV LOGISTICS LLC | | | SCAC4 |
| 2130 | TCVW | TECH CENTER AUTOMOTIVE & TOWING | | | SCAC4 |
| 2131 | TCVY | TRIPLE CROWN SERVICES COMPANY (OTR) | | | SCAC4 |
| 2132 | TCW | Thomas Cook Airline Belgium N.V. | IATA: FQ, Callsign: Thomas Cook, IATA designator changed to HQ* | B | AVCODES |
| 2133 | TCW | Thomas Cook Airline Belgium N.V. | IATA: HQ, Callsign: Thomas Cook, Name changed to VLM Airlines N.V. IATA designator changed from FQ* | B | AVCODES |
| 2134 | TCW | VLM Airlines N.V. | IATA: HQ, Callsign: Phoenix, Name changed from Thomas Cook Airline Belgium N.V. IATA designator changed from FQ* | B | AVCODES |
| 2135 | TCW | Thomas Cook Airlines | IATA: FQ | | ICAO1 |
| 2136 | TCWC | TRI-CITY WAREHOUSE CO | | | SCAC3 |
| 2137 | TCWC | TROPICAL CHEESE INDUSTRIES INC | | | SCAC4 |
| 2138 | TCWG | THREE CROW GLASS STUDIO | | | SCAC4 |
| 2139 | TCWI | TRAC INC | | | SCAC3 |
| 2140 | TCWL | TELCON CONCEALED WIRING LTD | | | SCAC4 |
| 2141 | TCWN | TRIPLE CROWN INC | | | SCAC3 |
| 2142 | TCWQ | TRI CITIES WHSE INC | | | SCAC3 |
| 2143 | TCWQ | TRIPLE CROWN | | | SCAC4 |
| 2144 | TCWR | Twin Cities & Western R.R. | added 4/1992; 1/1994-7/2005 | | NAKINA |
| 2145 | TCWR | Twin Cities & Western R.R. | added 4/92; 1/94-7/2000 | | NRHS |
| 2146 | TCWR | TWIN CITIES & WESTERN RAILROAD | | | PWRC |
| 2147 | TCWR | TWIN CITIES AND WESTERN | | | PWRC |
| 2148 | TCWR | Twin Cities and Western Railroad | | | RSRV |
| 2149 | TCWR | TWIN CITIES & WESTERN RAILROAD | | | SCAC3 |
| 2150 | TCWR | TWIN CITIES & WESTERN RAILROAD | | | SCAC4 |
| 2151 | TCWS | TANYS CARGO & | | | SCAC4 |
| 2152 | TCWX | Charles Lennig & Co., Inc. | 7/1937-4/1947 | | NAKINA |
| 2153 | TCWX | Charles Lennig & Co., Inc. | Apr-38 | | NRHS |
| 2154 | TCWX | CHARLES LENNING & CO., INC. | | | PWRC |
| 2155 | TCWX | TRICAN WELL SERVICE LLP | | | SCAC4 |
| 2156 | TCWY | T & C TOWING AND RECOVERY | | | SCAC4 |
| 2157 | TCX | Thomas Cook Airlines U.K. Ltd. | IATA: MT, Callsign: Globe, IATA Prefix: 092, ICAO callsign changed to Topjet. Name changed from JMC Airlines Limited. ICAO designator changed from JMC. ICAO callsign changed from JayEmmSee | GB | AVCODES |
| 2158 | TCX | Thomas Cook Airlines U.K. Ltd. | IATA: MT, Callsign: Topjet, IATA Prefix: 092, ICAO callsign changed from Globe. Name changed from JMC Airlines Limited. ICAO designator changed from JMC. ICAO callsign changed from JayEmmSee | GB | AVCODES |
| 2159 | TCX | Thomas Cook Airlines Limited of Manchester | IATA: MT, Callsign: Kestrel, IATA Prefix: 727, ICAO callsign changed to Thomas Cook w.e.f. 01 November 2018 previously changed from Topjet. Name changed from JMC Airlines Limited. ICAO designator changed from JMC. ICAO callsign changed from JayEmmSee | GB | AVCODES |
| 2160 | TCX | Thomas Cook Airlines Limited of Manchester | IATA: MT, Callsign: Thomas Cook, IATA Prefix: 727, Ceased operations on 28 September 2019. ICAO callsign changed from Kestral w.e.f. 01 November 2018 previously changed from Topjet. Name changed from JMC Airlines Limited. ICAO designator changed from JMC. ICAO callsign changed from JayEmmSee | GB | AVCODES |
| 2161 | TCX | Thomas Cook Airlines | IATA: MT | | ICAO1 |
| 2162 | TCX | The Texas Co. | 8/1920-7/1935 | | NAKINA |
| 2163 | TCX | Pennsylvania-Conley Tank Line, a Division of General American Transportation Corp. | 7/1937-1/1945 | | NAKINA |
| 2164 | TCX | General American Transportation Corp. | 1/1946-7/1965 | | NAKINA |
| 2165 | TCX | Texaco, Inc. (General American Transportation Corp.) | 10/1966 | | NAKINA |
| 2166 | TCX | General American Transportation Corp. | 4/1970-1/1994; eliminated 1/1998 | | NAKINA |
| 2167 | TCX | General American Marks Co. | added 1/1998; 7/2000; eliminated 1/2003 | | NAKINA |
| 2168 | TCX | The Texas Co. (Pennsylvania-Conley Tank Line, a Division of General American Transportation Corp.) | Apr-38 | | NRHS |
| 2169 | TCX | General American Transportation Corp. | 1/52-7/65 | | NRHS |
| 2170 | TCX | Texaco, Inc. (General American Transportation Corp.) | Oct-66 | | NRHS |
| 2171 | TCX | General American Transportation Corp. | 4/70-1/94; eliminated 1/98 | | NRHS |
| 2172 | TCX | General American Marks Co. | added 1/98; 7/2000 | | NRHS |
| 2173 | TCX | GENERAL AMERICAN MARKS CO. [GENERAL AMERICAN TRANSPORTATION CORP.(GATC)] (TEXACO, INC. [THE TEXAS CO.]) | | | PWRC |
| 2174 | TCX | General American Transportation Corporation (GATX) | | | RSRV |
| 2175 | TCX | The Texas Co | | USA | TRAFFIC |
| 2176 | TCXC | TEMPERATURE CONTROLLED EXPRESS INC | | | SCAC4 |
| 2177 | TCXF | T C TRANSPORTATION | | | SCAC4 |
| 2178 | TCXG | TCS EXPRESS INC | | | SCAC4 |
| 2179 | TCXH | T C X INC | | | SCAC3 |
| 2180 | TCXI | TRANSCONEX, INC | | | SCAC3 |
| 2181 | TCXJ | TLSC EXPRESS | | | SCAC4 |
| 2182 | TCXK | THREE (3) CHIX INC | | | SCAC4 |
| 2183 | TCXL | TRANS-CONTINENTAL XPRESS INC | | | SCAC3 |
| 2184 | TCXL | TLC EXPRESS LLC | | | SCAC4 |
| 2185 | TCXM | TCB- TRANSPORTATION CARRIER BROKERA | | | SCAC4 |
| 2186 | TCXN | TCX INTERNATIONAL, INC | | | SCAC3 |
| 2187 | TCXO | TRIPLE C EXPRESS INC | | | SCAC4 |
| 2188 | TCXP | TRI-COUNTY EXPRESS, INC | | | SCAC3 |
| 2189 | TCXQ | TC TRANSPORTATION INC | | | SCAC4 |
| 2190 | TCXR | T-C EXPRESS INC | | | SCAC3 |
| 2191 | TCXR | TRANS CX | | | SCAC4 |
| 2192 | TCXS | TCX, INC | | | SCAC3 |
| 2193 | TCXS | TCX INC | | | SCAC4 |
| 2194 | TCXT | TRANSPORT CONEXION LLC | | | SCAC4 |
| 2195 | TCXU | TRANSMIT CONTAINERS LTD | | GB | BIC |
| 2196 | TCXU | TCX S A R L | | | PWRC |
| 2197 | TCXU | TCX S A R L | | | PWRC |
| 2198 | TCXU | General American Transportation Corporation (GATX) | | | RSRV |
| 2199 | TCXV | THREE CORD (3CORD) TRANSPORTATION S | | | SCAC4 |
| 2200 | TCXW | TCM TRANSPORT | | | SCAC4 |
