| 1 | TTC | Transteco | Callsign: Transteco, | ANG | AVCODES |
| 2 | TTC | Transteco | | | ICAO1 |
| 3 | TTC | AAR-TRANSPORTATION TEST CENTER | | | PWRC |
| 4 | TTC | The Train Company (RailInsight B.V.) | | NL | TRAFFIC |
| 5 | TTC | The Train Company | | NL | VKM |
| 6 | TTCC | TERMINAL TRUCKING COMPANY, INC | | | SCAC1 |
| 7 | TTCF | TOTAL TRANSPORTATION CONCEPT INC | | | SCAC4 |
| 8 | TTCG | TRANSPORTES DE CARGA GERSHEL S A DE | | | SCAC4 |
| 9 | TTCI | TRANSPORTES CISNEROS | | | SCAC4 |
| 10 | TTCM | TRANSPORT TRICAM INC | | | SCAC4 |
| 11 | TTCM | The Transport Company (Milwaukee) | City: Milwaukee | USA | TRAFFIC |
| 12 | TTCNG | T.T. CARGO mednarodni prevozi d.o.o. | | SI | VKM |
| 13 | TTCQ | TREAT CORE SUPPLY | | | SCAC4 |
| 14 | TTCS | TRANTEC SYSTEMS INC | | | SCAC4 |
| 15 | TTCU | TNC CHEMICALS CO. | | | PWRC |
| 16 | TTCU | TNC Chemicals | | | RSRV |
| 17 | TTCV | T & T CARGO SERVICES INC | | | SCAC4 |
| 18 | TTCW | TRIMAC TRANSPORTATION CENTRAL INC | | | SCAC4 |
| 19 | TTCX | Texas Chemical Co. | 8/1920-7/1935 | | NAKINA |
| 20 | TTCX | Consolidated Chemical Industries Inc. | 7/1937-4/1938 | | NAKINA |
| 21 | TTCX | Tulsa Tank Car Corp. | 1/1945 | | NAKINA |
| 22 | TTCX | The Thomas Co. | added 10/1954; eliminated 10/1955 | | NAKINA |
| 23 | TTCX | Trailer Train Co. | 4/1970-1/1980; eliminated 1/1992 | | NAKINA |
| 24 | TTCX | TTX Co. | added 1/1992; 1/1994-7/2005 | | NAKINA |
| 25 | TTCX | Trailer Train Co. (flush deck flat cars equipped with movable foldaway container pedestals for transporting containers) | 4/1970-7/1985 | | NAKINA |
| 26 | TTCX | Trailer Train Co. (60', 89'1"" and 89'4"" COFC cars. 60' cars (5 digit car numbers) are equipped with fixed container pedestals and limited cushioning and are stencilled 'DO NOT HUMP'. 60' cars are capable of carrying 3-20' or 1-40' & 1-20' container fully loaded to a maximum gross weight per car (containers & lading) of 159,000 lbs. 89'4"" cars (6 digit car numbers beginning with '9') are equipped with movable foldaway container pedestals capable of carrying various combinations of containers of varying le | 10/1991 | | NAKINA |
| 27 | TTCX | TTX Co. (60', 89'1"" and 89'4"" COFC cars. 60' cars (5 digit car numbers) are equipped with fixed container pedestals and are capable of carrying 3-20' or 1-40' & 1-20' container fully loaded to a maximum gross weight per car (containers & lading) of 159,000 lbs. 89'4"" cars (6 digit car numbers beginning with '9') are equipped with movable foldaway container pedestals capable of carrying various combinations of containers of varying lengths loaded to a maximum gross weight per car (containers & lading) of | 1/1992-7/2000 | | NAKINA |
| 28 | TTCX | Texas Chemical Co. (Consolidated Chemical Industries Inc.) | Apr-38 | | NRHS |
| 29 | TTCX | Trailer Train Co. | Apr-70 | | NRHS |
| 30 | TTCX | Trailer Train Co. (flush deck flat cars equipped with movable foldaway container pedestals for transporting containers) | 1/75-1/80 | | NRHS |
| 31 | TTCX | Trailer Train Co. | eliminated 1/92 | | NRHS |
| 32 | TTCX | TTX Co. | added 1/92 | | NRHS |
| 33 | TTCX | TTX Co. (60', 89'1" and 89'4" COFC cars. 60' cars (5 digit car numbers) are equipped with fixed container pedestals and are capable of carrying 3-20' or 1-40' & 1-20' container fully loaded to a maximum gross weight per car (containers & lading) of 159,000 lbs. 89'4" cars (6 digit car numbers beginning with 9) are equipped with movable foldaway container pedestals capable of carrying various combinations of containers of varying lengths loaded to a maximum gross weight per car (containers & lading) of 150,0 | 1/94-7/2000 | | NRHS |
| 34 | TTCX | *CONSOLIDATED CHEMICAL INDUSTRIES, INC [TEXAS CHEMICAL CO.] | | | PWRC |
| 35 | TTCX | *TULSA TANK CAR CORP. | | | PWRC |
| 36 | TTCX | *THE THOMAS CO. | | | PWRC |
| 37 | TTCX | +TTX COMPANY {TRAILER TRAIN COMPANY} | | | PWRC |
| 38 | TTCX | Trailer Train (TTX Corporation) | | | RSRV |
| 39 | TTCX | TTX COMPANY | | | SCAC4 |
| 40 | TTCY | TITAN COMPANY, THE | | | SCAC4 |
| 41 | TTCZ | FLEXI-VAN LEASING INC | | | SCAC4 |
