| 1 | ATTX | Trailer Train Co. | 7/1965-1/1980; eliminated 1/1992 | | NAKINA |
| 2 | ATTX | TTX Co. | added 1/1992; 1/1994-7/2005 | | NAKINA |
| 3 | ATTX | American Turpentine & Tar Co. (, Ltd.) | 8/1920-1/1952; eliminated 4/1953; added 4/1953; 7/1954; eliminated 4/1956; added 4/1956; 10/1957; eliminated 10/1960 | | NAKINA |
| 4 | ATTX | Trailer Train Co. (FC flats equipped with 2 continuous tie-down anchor bars applied to centre sills and 2 continuous side tie-down rails. Cars are not equipped with jacks, chains, hitch and safety chains) | 4/1963-10/1968 | | NAKINA |
| 5 | ATTX | Trailer Train Co./TTX Co. (flat cars equipped with 2 continuous tie-down loops on centre sills, continuous tie-down rails on each side and bridge plates. Not equipped with hitches, chains, jacks, etc.) | 4/1970-1/1994 | | NAKINA |
| 6 | ATTX | TTX Co. (60 ft. COFC flatcars, equipped with spark shields and container latches, capable of carrying 3-20 ft. containers, or 1-40 ft. and 1-20 ft. container, fully loaded to a maximum gross weight per car (containers and lading) of 159,000 lbs.) | 7/2000 | | NAKINA |
| 7 | ATTX | American Turpentine & Tar Co., Ltd. | 4/38-10/57; eliminated 10/60 | | NRHS |
| 8 | ATTX | Trailer Train Co. | Jul-65 | | NRHS |
| 9 | ATTX | Trailer Train Co. (FC flats equipped with 2 continuous tie-down anchor bars applied to centre sills and 2 continuous side tie-down rails. Cars are not equipped with jacks, chains, hitch and safety chains) | 10/66-10/68 | | NRHS |
| 10 | ATTX | Trailer Train Co. | Apr-70 | | NRHS |
| 11 | ATTX | Trailer Train Co. (flat cars equipped with 2 continuous tie-down loops on centre sills, continuous tie-down rails on each side and bridge plates. Not equipped with hitches, chains, jacks, etc.) | 1/75-1/80 | | NRHS |
| 12 | ATTX | Trailer Train Co. | eliminated 1/92 | | NRHS |
| 13 | ATTX | TTX Co. | added 1/92 | | NRHS |
| 14 | ATTX | TTX Co. (flat cars equipped with 2 continuous tie-down loops on centre sills, continuous tie-down rails on each side. Not equipped with hitches, chains, jacks, etc.) | Jan-94 | | NRHS |
| 15 | ATTX | TTX Co. (60 ft. COFC flatcars, equipped with spark shields and container latches, capable of carrying 3-20 ft. containers, or 1-40 ft. and 1-20 ft. container, fully loaded to a maximum gross weight per car (containers and lading) of 159,000 lbs.) | Jul-00 | | NRHS |
| 16 | ATTX | *AMERICAN TURPENTINE & TAR CO. LTD. | | | PWRC |
| 17 | ATTX | +TTX COMPANY - TRAILER TRAIN CO. | | | PWRC |
| 18 | ATTX | American Turpentine & Tar (TTX Corporation) | | | RSRV |
| 19 | ATTX | TTX COMPANY | | | SCAC4 |