| 1 | TOC | Aerotropical, S.A. de C.V. | Callsign: Tropicmex, | MEX | AVCODES |
| 2 | TOC | Aerotropical | | | ICAO1 |
| 3 | TOC | New York Central System | 10/1966 | | NAKINA |
| 4 | TOC | Penn Central Transportation Co. | 4/1970-1/1975 | | NAKINA |
| 5 | TOC | Penn Central Transportation Co., Robert W. Blanchette, Richard C. Bond and John H. McArthur, Trustees | eliminated 4/1976 | | NAKINA |
| 6 | TOC | Consolidated Rail Corp. | added 4/1976; 1/1980; eliminated 1/1983; added 5/1983; eliminated 7/1999; 1/1994 | | NAKINA |
| 7 | TOC | New York Central System | Oct-66 | | NRHS |
| 8 | TOC | Penn Central Transportation Co. | 4/70-1/75 | | NRHS |
| 9 | TOC | Penn Central Transportation Co., Robert W. Blanchette, Richard C. Bond and John H. McArthur, Trustees | eliminated 4/76 | | NRHS |
| 10 | TOC | Consolidated Rail Corp. | added 4/76; 1/80; eliminated 1/83; added 5/83; eliminated 7/99; 1/94 | | NRHS |
| 11 | TOC | CONSOLIDATED RAIL CORP. [PENN CENTRAL; NEW YORK CENTRAL; TOLEDO & OHIO CENTRAL RY] | | | PWRC |
| 12 | TOC | Toledo & Ohio Central Railway (Conrail) | | | RSRV |
| 13 | TOC | Toledo and Ohio Central Railway | | USA | TRAFFIC |
| 14 | TOCA | TRANS OCEAN CARRIER INC | | | SCAC4 |
| 15 | TOCB | TRANSPORTES CARBA SA DE CV | | | SCAC4 |
| 16 | TOCC | TONAWANDA COKE CORP. | | | PWRC |
| 17 | TOCC | TRANSOCEANIC CABLE SHIP COMPANY LLC | | | SCAC4 |
| 18 | TOCD | TURNER OIL CO INC | | | SCAC4 |
| 19 | TOCE | TOTAL OCEAN | | | SCAC1 |
| 20 | TOCE | TOTAL OCEAN MARINE SERVICES INC | | | SCAC4 |
| 21 | TOCG | TRANSPORTES DE CARGA GUTIERREZ | | | SCAC4 |
| 22 | TOCH | TOWLE, CHARLES C | | | SCAC1 |
| 23 | TOCHIO | Tochio Railway | | J | TRAFFIC |
| 24 | TOCN | TWO SIX FOUR SIX-FIVE EIGHT FOUR NI | | | SCAC4 |
| 25 | TOCP | TYLER OIL CO | | | SCAC4 |
| 26 | TOCQ | TORRES CONTAINER CONNECTION | | | SCAC4 |
| 27 | TOCS | TII LOGISTICS INC | | | SCAC4 |
| 28 | TOCT | TOTEM OCEAN TRAILER EXPRESS INC | | | SCAC4 |
| 29 | TOCV | THIEL OIL CO | | | SCAC4 |
| 30 | TOCX | True's Oil Co. | 7/1935-1/1943; 1/1945 (not listed); 1/1946-10/1957; eliminated 7/1958 | | NAKINA |
| 31 | TOCX | True's Oil Co. | 4/38-10/57; eliminated 7/58 | | NRHS |
| 32 | TOCX | TRUE'S OIL CO. | | | PWRC |
| 33 | TOCX | TTX COMPANY | | | SCAC4 |
| 34 | TOCZ | TOCCA CASKET CO. | | | PWRC |