| 1701 | TCJF | TRANSONICK CAPACITY SOLUTIONS LLC | | | SCAC4 |
| 1702 | TCJG | TRANSPORTES CORONADO SA DE CV | | | SCAC4 |
| 1703 | TCJH | TRANSCO LOGISTICS LLC | | | SCAC4 |
| 1704 | TCJI | TRANSPORT CHRISTIAN JACQUES INC | | | SCAC4 |
| 1705 | TCJJ | TRANSPORTATION CONCEPTS INC | | | SCAC4 |
| 1706 | TCJK | TC TRANSFER SA DE CV | | | SCAC4 |
| 1707 | TCJO | TRANSPORTES CAMARGO | | | SCAC4 |
| 1708 | TCJS | TRAFFIC CALMING USA | | | SCAC4 |
| 1709 | TCJT | TCJT INC | | | SCAC4 |
| 1710 | TCJV | TRUCK CHOICING COM LLC | | | SCAC4 |
| 1711 | TCJW | T CARVILLE TRUCKING | | | SCAC4 |
| 1712 | TCJY | TRANSPORTES CGRJ SA DE CV | | | SCAC4 |
| 1713 | TCK | Air Truks | Callsign: Bul Trucks, | BG | AVCODES |
| 1714 | TCK | Trans Caravan KG | Callsign: Trans Caravan, | KS | AVCODES |
| 1715 | TCKB | TCB BROKERAGE INC | | | SCAC4 |
| 1716 | TCKC | TRUCKS ON THE RUN INC | | | SCAC4 |
| 1717 | TCKE | TRACK ENTERPRISES INC | | | SCAC3 |
| 1718 | TCKF | TRIPLE C TRUCKING INC | | | SCAC3 |
| 1719 | TCKF | TRIPLE C TRUCKING INC | | | SCAC4 |
| 1720 | TCKG | T L C TRUCKING INC | | | SCAC3 |
| 1721 | TCKH | TIRIS TRUCKING INC | | | SCAC4 |
| 1722 | TCKI | T C ROCKFISH | | | SCAC4 |
| 1723 | TCKJ | TUCKER, JIMMIE TRUCKING INC | | | SCAC4 |
| 1724 | TCKL | TURKEY CREEK TRUCK LINES LLC | | | SCAC4 |
| 1725 | TCKM | TRACKER MARINE INC | | | SCAC4 |
| 1726 | TCKN | TRIPLE C TRUCKING | | | SCAC4 |
| 1727 | TCKO | TRADENS TRUCKING INC | | | SCAC4 |
| 1728 | TCKP | TRICH TRUCKING | | | SCAC4 |
| 1729 | TCKR | Turtle Creek Industrial R.R., Inc. | added 1/1983; 1/1994-7/2005 | | NAKINA |
| 1730 | TCKR | Turtle Creek Industrial R.R., Inc. | added 1/83; 1/94-7/2000 | | NRHS |
| 1731 | TCKR | TURTLE CREEK INDUSTRIAL RAILROAD,INC. | | | PWRC |
| 1732 | TCKR | Turtle Creek Industrial Railroad | | | RSRV |
| 1733 | TCKR | TURTLE CREEK INDUSTRIAL RAILROAD IN | | | SCAC3 |
| 1734 | TCKS | TRIPLE C TANK LINES LLC | | | SCAC4 |
| 1735 | TCKT | TUCKER, A B TRUCKING | | | SCAC3 |
| 1736 | TCKU | TRITON CONTAINER INTERNATIONAL LTD | | BM | BIC |
| 1737 | TCKU | Triton Container International | | | RSRV |
| 1738 | TCKU | TRITON CONTAINER INTERNATIONAL CORP | | | SCAC4 |
| 1739 | TCKV | TACKETT TRUCKING INC | | | SCAC4 |
| 1740 | TCKW | TIMCO TRUCKING LLC | | | SCAC4 |
| 1741 | TCKY | TACKABERRY, G & SONS CONSTRUCTION C | | | SCAC4 |
| 1742 | TCL | Escape Aviation d/b/a Coastal Air Transport | Callsign: Trans Coastal, | USA | AVCODES |
| 1743 | TCL | Coastal Air Transport | | | ICAO1 |
| 1744 | TCL | | City: Limoges | F | TRAFFIC |
| 1745 | TCLA | TECHNICAL CHEMICAL LOGISTICS LLC | | | SCAC4 |
| 1746 | TCLB | TEWES CO OF LIBERTYVILLE INC, THE | | | SCAC3 |
| 1747 | TCLB | TRANSPORT CHALUT 2000 INC | | | SCAC4 |
| 1748 | TCLC | TRANSCONTINENTAL LEASING CORP | | | SCAC3 |
| 1749 | TCLC | TRANSPORTES DE CARGA ANGELES AZULES | | | SCAC4 |
| 1750 | TCLD | TRANSPORT CLAUDE BENOIT | | | SCAC3 |
| 1751 | TCLE | TRANSCONTINENTAL EXPRESS (DIV OF AD | | | SCAC3 |
| 1752 | TCLF | TC CLIFFS TANK LINES LLC | | | SCAC4 |
| 1753 | TCLG | TRI CITY LEASING INC | | | SCAC3 |
| 1754 | TCLI | TATUM COACH LINES | | | SCAC3 |
| 1755 | TCLI | TOP CONTAINER LINE INC | | | SCAC4 |
| 1756 | TCLL | TRANS CONTINENTAL LEASING LTD | | | SCAC3 |
| 1757 | TCLM | TOWNSHIP LIMOUSINE SERVICE | | | SCAC3 |
| 1758 | TCLM | TRANSPORT CLEMENT BERGERON INC | | | SCAC4 |
| 1759 | TCLN | TOCO LINES INC | | | SCAC3 |
| 1760 | TCLN | TOCO LINES INC | | | SCAC4 |
| 1761 | TCLO | TRANSPORT CASTILLOUX INC | | | SCAC3 |
| 1762 | TCLP | TRANSAMERICAN COACH LINES INC | | | SCAC3 |
| 1763 | TCLQ | TRANSPEC LOGISTICS | | | SCAC4 |
| 1764 | TCLR | TRANSPORT COOL EXPRESS | | | SCAC4 |
| 1765 | TCLS | TOTAL COMFORT LIMOUSINE SERVICE LTD | | | SCAC3 |
| 1766 | TCLT | TRANSCONTINENTAL TRUCKING CORPORATI | | | SCAC3 |
| 1767 | TCLT | TRANS CAL TEAM | | | SCAC4 |
| 1768 | TCLU | TRITON CONTAINER INTERNATIONAL LTD | | BM | BIC |
| 1769 | TCLU | TCL TANKCARGO CONTAINER LEASING S.A. | | | PWRC |
| 1770 | TCLU | TCL Tankcargo Container Leasing SA | | | RSRV |
| 1771 | TCLU | TROY CATUCCI LINES | | | SCAC3 |
| 1772 | TCLU | TAL INTERNATIONAL | | | SCAC4 |
| 1773 | TCLX | Transit Co., Ltd. | 8/1920-1/1952; eliminated 10/1953 | | NAKINA |
| 1774 | TCLX | Union Tank Car Co. | added 10/1953; 7/1954-10/1957; eliminated 4/1960 | | NAKINA |
| 1775 | TCLX | Trinity Chemical Leasing, L.L.C. | added 4/2000; 7/2000; eliminated 10/2000; added 1/2003; eliminated 4/2003; 7/2005 (not listed) | | NAKINA |
| 1776 | TCLX | Transit Co., Ltd. | 4/38-1/52; eliminated 10/53 | | NRHS |
| 1777 | TCLX | Union Tank Car Co. | added 10/53; 10/57 | | NRHS |
| 1778 | TCLX | Trinity Chemical Leasing, L.L.C. | added 4/2000; 7/2000; eliminated 10/2000 | | NRHS |
| 1779 | TCLX | *AMERICAN REFRIGERATOR TRANSIT CO.[UNION TANK CAR CO.; TRANSIT CO., LTD.] | | | PWRC |
| 1780 | TCLX | +TRINITY CHEMICAL LEASING, LLC | | | PWRC |
| 1781 | TCLX | Trinity Chemical Leasing | | | RSRV |
| 1782 | TCM | Teledyne Continental Motors | Callsign: Teledyn, | USA | AVCODES |
| 1783 | TCM | Teledyne Continental Motors | | | ICAO1 |
| 1784 | TCMA | TEC-MAR TRANSPORTATION SERVICES INC | | | SCAC3 |
| 1785 | TCMB | TRANSPORTES CAMACHO BARAJAS | | | SCAC4 |
| 1786 | TCMC | TOWN & COUNTRY MOVING COMPANY | | | SCAC3 |
| 1787 | TCMC | TRANSPORTES CUAUHTEMOC S A DE C V | | | SCAC4 |
| 1788 | TCMD | TRI CITY MOVING & DELIVERY INC | | | SCAC3 |
| 1789 | TCMD | TRICO COMPONENTES SA DE CV | | | SCAC4 |
| 1790 | TCME | T N C INC | | | SCAC3 |
| 1791 | TCME | TERRA CERAMICA SA DE CV | | | SCAC4 |
| 1792 | TCMF | TAP-CON MANUFACTURING INC | | | SCAC4 |
| 1793 | TCMG | TRANSPORTE DE CARGA Y MERCANCIA GEN | | | SCAC4 |
| 1794 | TCMH | TECUMSEH PIPE LINE COMPANY | | | SCAC3 |
| 1795 | TCMH | TRANSPORTES CAMACHO | | | SCAC4 |
| 1796 | TCMI | TRANS-CALIFORNIA MOTOR LINES INC | | | SCAC3 |
| 1797 | TCMI | TRANSPORT CLOMAR INC | | | SCAC4 |
| 1798 | TCMK | THREE CON (3CON) FREIGHT INC | | | SCAC4 |
| 1799 | TCML | TEXAS CENTRAL MOTOR LINES INC | | | SCAC3 |
| 1800 | TCMM | TOWN & COUNTRY MOVERS INC | | | SCAC3 |
