| 5501 | TLA | A-A-A Air Enterprises, Inc. | Callsign: Triple Alpha, | USA | AVCODES |
| 5502 | TLA | Aereotcla, S.A. de C.V. | Callsign: Aerocla, | MEX | AVCODES |
| 5503 | TLA | Translift Airways | | | ICAO1 |
| 5504 | TLAA | TIMCO LOGISTICS SYSTEMS INC (DIVISI | | | SCAC4 |
| 5505 | TLAB | TRANSPORT & LOCATION ALFRED BOUDREA | | | SCAC4 |
| 5506 | TLAC | TOTAL LOGISTICS CONSULTANTS LLC | | | SCAC4 |
| 5507 | TLAD | TRANSPORTES LASTRA | | | SCAC4 |
| 5508 | TLAE | TRANSPORTES LARA CUELLAR | | | SCAC4 |
| 5509 | TLAF | TRANSPORT LAPLANTE & FILS INC | | | SCAC4 |
| 5510 | TLAI | TAL AIR | | | SCAC4 |
| 5511 | TLAL | TRANSITALL SOLUTIONS INC | | | SCAC4 |
| 5512 | TLAM | TLC LIGHTING INC | | | SCAC4 |
| 5513 | TLAN | TRANSPORT LANDROCH | | | SCAC4 |
| 5514 | TLAO | TOSHIBA LOGISTICS AMERICA INCORPORA | | | SCAC4 |
| 5515 | TLAU | TRAIL-CON LEASING INCORPORATED (CANADIAN PACIFIC LIMITED) | | | PWRC |
| 5516 | TLAU | Trail-Con Leasing | | | RSRV |
| 5517 | TLAU | TRAILCON LEASING INC | | | SCAC4 |
| 5518 | TLAX | Transload America | 7/2005 (not listed) | | NAKINA |
| 5519 | TLAX | TRANSLOAD AMERICA | | | PWRC |
| 5520 | TLAX | TRANSLOAD AMERICA LLC | | | SCAC4 |
| 5521 | TLAY | TIMCO LOGISTICS SYSTEMS INC | | | SCAC4 |
| 5522 | TLAZ | TRAIL-CON LEASING INCORPORATED | | | PWRC |
| 5523 | TLAZ | Trail-Con Leasing | | | RSRV |
| 5524 | TLAZ | TRAILCON LEASING INC | | | SCAC4 |
| 5525 | TLB | Atlantique Air Assistance | IATA: L5, Callsign: Triple-A, Founded in 1989. Ceased operations in October 2017. | F | AVCODES |
| 5526 | TLB | Atlantique Air Assistance | | | ICAO1 |
| 5527 | TLBE | TRANSPORT LAFLEUR BEAUREGARD INC | | | SCAC4 |
| 5528 | TLBF | TMS LOGISTICS INC | | | SCAC4 |
| 5529 | TLBJ | TRANS LOGISTICS CORP | | | SCAC4 |
| 5530 | TLBN | TRANSPORT F D D L B INC | | | SCAC4 |
| 5531 | TLBP | TRANSPORT LUC BONIN | | | SCAC4 |
| 5532 | TLBS | TORONTO LUBE SERVICE | | | SCAC4 |
| 5533 | TLBU | TOSOH LOGISTICS CORPORATION | | J | BIC |
| 5534 | TLBW | TRANSWORLD LINE INC | | | SCAC4 |
| 5535 | TLBY | TANEL, ROGER | | | SCAC4 |
| 5536 | TLC | Caribbean Express, Inc. | Callsign: Carib-X, | USA | AVCODES |
| 5537 | TLC | Caribbean Express | | | ICAO1 |
| 5538 | TLCA | TLC NATIONWIDE INC | | | SCAC4 |
| 5539 | TLCB | TLC MOVING INC | | | SCAC4 |
| 5540 | TLCC | TRANSPORTES LAS CRUCITAS | | | SCAC4 |
| 5541 | TLCD | TUM LOGISTICS CARRIER DIVISION INC | | | SCAC4 |
| 5542 | TLCE | TELLO CRUZ, LETICIA | | | SCAC4 |
| 5543 | TLCG | TRAILCO INC | | | SCAC4 |
| 5544 | TLCI | TOTAL LOGISTICS CARGO INC | | | SCAC4 |
| 5545 | TLCN | TELESAT CANADA | | | SCAC4 |
| 5546 | TLCO | TALCO TRUCKING INC | | | SCAC4 |
| 5547 | TLCP | TORSPEC INTERNATIONAL INC | | | SCAC4 |
| 5548 | TLCQ | TALON LOGISTICS INC | | | SCAC4 |
| 5549 | TLCRG | Transport line Cargo s.r.o. | | CZ | TRAFFIC |
| 5550 | TLCS | TRANSPORTES LOS CHINACOS S A DE C V | | | SCAC4 |
| 5551 | TLCU | UNIFEEDER A/S | | PL | BIC |
| 5552 | TLCU | TECO LINES AS | | | SCAC4 |
| 5553 | TLCV | TLC SERVICES, INC | | | SCAC1 |
| 5554 | TLCV | TOTAL COVERAGE INC | | | SCAC4 |
| 5555 | TLCW | TRANSPORTES ESPECIALIZADOS LA CONQU | | | SCAC4 |
| 5556 | TLCX | Trinidad Leaseholds (Canada) Ltd. (marks changed to RRCX) | 1/1950-7/1954; eliminated 4/1956 | | NAKINA |
| 5557 | TLCX | Transport Leasing Co. | added 10/1959; 4/1961 | | NAKINA |
| 5558 | TLCX | Transport Leasing (Subsidiary of Pullman Inc.) | eliminated 4/1963 | | NAKINA |
| 5559 | TLCX | Transport Leasing, a Division of Pullman Inc. | added 4/1963; 7/1965-4/1970; eliminated 10/1970 | | NAKINA |
| 5560 | TLCX | Pullman Transport Leasing Co., a Subsidiary of Pullman Inc. | added 10/1970; 1/1975; eliminated 1/1976 | | NAKINA |
| 5561 | TLCX | Pullman Leasing Co., a Subsidiary of Pullman Inc. | added 1/1976; 1/1980; eliminated 4/1981 | | NAKINA |
| 5562 | TLCX | Pullman Leasing Co. | added 4/1981; eliminated 1/1990 | | NAKINA |
| 5563 | TLCX | Itel Rail Corp. | added 1/1990; eliminated 10/1992 | | NAKINA |
| 5564 | TLCX | General Electric Railcar Services Corp. | added 10/1992; 1/1994; eliminated 1/2000 | | NAKINA |
| 5565 | TLCX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 5566 | TLCX | Trinidad Leaseholds (Canada) Ltd. | Jan-52 | | NRHS |
| 5567 | TLCX | Transport Leasing Co. | added 10/59; 4/61 | | NRHS |
| 5568 | TLCX | Transport Leasing, a Division of Pullman Inc. | 7/65-4/70; eliminated 10/70 | | NRHS |
| 5569 | TLCX | Pullman Transport Leasing Co., a Subsidiary of Pullman Inc. | added 10/70; 1/75 | | NRHS |
| 5570 | TLCX | Pullman Leasing Co., a Subsidiary of Pullman Inc. | 1/80; eliminated 4/81 | | NRHS |
| 5571 | TLCX | Pullman Leasing Co. | added 4/81; eliminated 1/90 | | NRHS |
| 5572 | TLCX | Itel Rail Corp. | added 1/90; eliminated 10/92 | | NRHS |
| 5573 | TLCX | General Electric Railcar Services Corp. | added 10/92; 1/94; eliminated 1/2000 | | NRHS |
| 5574 | TLCX | General Electric Rail Services Corp. | added 1/2000; 7/2000 | | NRHS |
| 5575 | TLCX | *TRINIDAD LEASEHOLDS (CANADA) LTD. (MARK CHANGED TO RRCX) | | | PWRC |
| 5576 | TLCX | +(NATX) GENERAL ELECTRIC RAIL SERVICES CORP. [ITEL RAIL CORP.; PULLMAN LEASING CO.] | | | PWRC |
| 5577 | TLCX | Pullman Leasing | | | RSRV |
| 5578 | TLCX | GENERAL ELECTRIC RAILCAR SERVICES C | | | SCAC4 |
| 5579 | TLCX | Transport Leasing Co. | now: General Electric Rail Services Corp. | USA | TRAFFIC |
| 5580 | TLCY | T S LEGACY LOGISTICS LP | | | SCAC4 |
| 5581 | TLD | Aero Taxi, S.A. de C.V. | Callsign: Aero Autlan, Name changed to Aero Taxi Autlan, S.A. de C.V. | MEX | AVCODES |
| 5582 | TLD | Aero Taxi Autlan, S.A. de C.V. | Callsign: Aero Autlan, Name changed to Aero Taxi, S.A. de C.V. | MEX | AVCODES |
| 5583 | TLD | Aero Taxi Autlan | | | ICAO1 |
| 5584 | TLDD | TLD DISTRIBUTING COMPANY AND VEGAS | | | SCAC4 |
| 5585 | TLDF | TRANSCO LOGISTICS CORP | | | SCAC4 |
| 5586 | TLDG | TRANSLOADING SERVICES COMPANY | | | SCAC4 |
| 5587 | TLDJ | TALBERT LOGISTICS LLC | | | SCAC4 |
| 5588 | TLDK | TLT LOGISTICS LLC | | | SCAC4 |
| 5589 | TLDM | TRACTOLIDER & LOGISTICA DEL BRAVO S | | | SCAC4 |
| 5590 | TLDV | TOTAL DISTRIBUTION SERVICE INC | | | SCAC4 |
| 5591 | TLDX | Transport Leasing, a Division of Pullman Inc. | added 4/1963; 7/1965-4/1970; eliminated 10/1970 | | NAKINA |
| 5592 | TLDX | Pullman Transport Leasing Co., a Subsidiary of Pullman Inc. | added 10/1970; 1/1975; eliminated 1/1976 | | NAKINA |
| 5593 | TLDX | Pullman Leasing Co., a Subsidiary of Pullman Inc. | added 1/1976; 1/1980; eliminated 4/1981 | | NAKINA |
| 5594 | TLDX | Pullman Leasing Co. | added 4/1981; eliminated 1/1990 | | NAKINA |
| 5595 | TLDX | Itel Rail Corp. | added 1/1990; eliminated 10/1992 | | NAKINA |
| 5596 | TLDX | General Electric Railcar Services Corp. | added 10/1992; 1/1994; eliminated 1/2000 | | NAKINA |
| 5597 | TLDX | General Electric Rail Services Corp. | added 1/2000; 7/2000-7/2005 | | NAKINA |
| 5598 | TLDX | Transport Leasing, a Division of Pullman Inc. | 7/65-4/70; eliminated 10/70 | | NRHS |
| 5599 | TLDX | Pullman Transport Leasing Co., a Subsidiary of Pullman Inc. | added 10/70; 1/75 | | NRHS |
| 5600 | TLDX | Pullman Leasing Co., a Subsidiary of Pullman Inc. | 1/80; eliminated 4/81 | | NRHS |
