| 1 | THC | Tar Heel Aviation, Inc. | Callsign: Tarheel, | USA | AVCODES |
| 2 | THC | Transportes Nacionales, C.A. | Callsign: Tranaven, | YV | AVCODES |
| 3 | THC | Tar Heel Aviation | | | ICAO1 |
| 4 | THCA | 3-C TRUCKING, S.A.R. Distribution, INC | | | SCAC3 |
| 5 | THCB | THREE ZERO THREE (303) CAB ASSOCIAT | | | SCAC3 |
| 6 | THCD | T H C INC | | | SCAC3 |
| 7 | THCF | THREE C INC (3 C INC) | | | SCAC3 |
| 8 | THCF | THERMAL PROCESS SYSTEMS INC | | | SCAC4 |
| 9 | THCG | THOMPSON CARTAGE INC | | | SCAC3 |
| 10 | THCH | THOMPSON, CRUSE H | | | SCAC3 |
| 11 | THCI | THICO INTERNATIONAL GROUP INC | | | SCAC3 |
| 12 | THCK | TRANSPORT HAROLD CARRUTHERS INC | | | SCAC4 |
| 13 | THCL | TOP HAT CHAYFFEURED LIMOUSINE SERVI | | | SCAC3 |
| 14 | THCM | TRILLIUM HEALTH CARE | | | SCAC4 |
| 15 | THCN | THOMPSON CONSTRUCTION CO | | | SCAC3 |
| 16 | THCO | THRIFT TRUCKING CO | | | SCAC3 |
| 17 | THCR | THREE COUNTRIES LLC | | | SCAC4 |
| 18 | THCT | THETA CABLE TELEVISION | | | SCAC3 |
| 19 | THCT | T H CARTAGE | | | SCAC4 |
| 20 | THCV | TRANSPORTES HERMANOS CALDERON | | | SCAC4 |
| 21 | THCW | THOMPSON CARRIERS INC | | | SCAC4 |
| 22 | THCX | The Henderson Co. | 7/1923-7/1930 | | NAKINA |
| 23 | THCX | The Henderson Co. of Maine | 7/1932 | | NAKINA |
| 24 | THCX | The Henderson Co. | 7/1935 | | NAKINA |
| 25 | THCX | Publiker Industries, Inc. | added 1/1986; 1/1994; eliminated 10/1994 | | NAKINA |
| 26 | THCX | MG Industries | 7/2000-7/2005 (not listed) | | NAKINA |
| 27 | THCX | Publiker Industries, Inc. | added 1/86; 1/94; eliminated 10/94 | | NRHS |
| 28 | THCX | MG Industries | Jul-00 | | NRHS |
| 29 | THCX | *THE HENDERSON CO. | | | PWRC |
| 30 | THCX | *PUBLICKER INDUSTRIES INC. | | | PWRC |
| 31 | THCX | +MG INDUSTRIES | | | PWRC |
| 32 | THCX | MG Industries | | | RSRV |
| 33 | THCX | MG INDUSTRIES | | | SCAC4 |
| 34 | THCZ | THUNDERHAWK CO-OP | | | PWRC |
