| 1 | TMC | Tarmac Aviation Ltd. | Callsign: Tarmac, | GB | AVCODES |
| 2 | TMC | Travel Management Company Ltd. | Callsign: Trail Blaer, | USA | AVCODES |
| 3 | TMC | Temiscouata Ry. | 8/1920-1/1950 | | NAKINA |
| 4 | TMC | Temiscouata Ry. | Apr-38 | | NRHS |
| 5 | TMC | TEMISCOUATA RWY. | | | PWRC |
| 6 | TMC | Transportas Companhia de Macau | City: Macau | | TRAFFIC |
| 7 | TMCA | THOMAS, C A LLC | | | SCAC4 |
| 8 | TMCD | TMC | | | SCAC4 |
| 9 | TMCE | TRANS-MC | | | SCAC4 |
| 10 | TMCF | THREE M (3M) CANADA COMPANY | | | SCAC4 |
| 11 | TMCH | TRANSPORTES MINEROS DE COAHUILA SA | | | SCAC4 |
| 12 | TMCI | TRANSPORT MCV INC | | | SCAC4 |
| 13 | TMCJ | TOKYO MARINE CO LTD | | | SCAC4 |
| 14 | TMCK | TRANSPORTES MARVIN COUTINO RIOS | | | SCAC4 |
| 15 | TMCM | TRANSPORTADORA MEXICANA COMERCIAL S | | | SCAC4 |
| 16 | TMCN | TEXAS MOTOR CARRIER LLC | | | SCAC4 |
| 17 | TMCQ | THE MIDDLESEX CORPORATION | | | SCAC4 |
| 18 | TMCR | TRAMCOR CORPORATION | | | SCAC4 |
| 19 | TMCS | THOMPSON CARGO SPECIALISTS INC | | | SCAC4 |
| 20 | TMCT | TRANSPORT MICHEL COTE | | | SCAC4 |
| 21 | TMCU | TRANSMAR INTERNATIONAL SHIPPING COMPANY | | ET | BIC |
| 22 | TMCU | TRANSMAR SHIPPING COMPANY | | | SCAC4 |
| 23 | TMCV | TMCI INC | | | SCAC4 |
| 24 | TMCW | TRI ME CABINETS & MILLWORK LTD | | | SCAC4 |
| 25 | TMCX | The Mars Co. | 7/1937-1/1941 | | NAKINA |
| 26 | TMCX | The Maxson Corp. | added 7/1972; 1/1975; eliminated 1/1978 | | NAKINA |
| 27 | TMCX | Temco Corp. | added 10/1984; 1/1994; eliminated 10/1996 | | NAKINA |
| 28 | TMCX | The Mars Co. | Apr-38 | | NRHS |
| 29 | TMCX | The Maxson Corp. | 1/75; eliminated 1/78 | | NRHS |
| 30 | TMCX | Temco Corp. | added 10/84; 1/94; eliminated 10/96 | | NRHS |
| 31 | TMCX | *THE MARS CO. | | | PWRC |
| 32 | TMCX | *MAXON CORP. | | | PWRC |
| 33 | TMCX | *TEMCO CORPORATION | | | PWRC |
