| 1 | TRG | Atlantic Island Air | Callsign: Triangle, | IS | AVCODES |
| 2 | TRG | Tragsa (Medios Aereos) | | E | AVCODES |
| 3 | TRG | TRAGSA (Medios Aereos) | | | ICAO1 |
| 4 | TRG | TRUDEAU, R G | | | SCAC4 |
| 5 | TRG | TRIANGULA Logistik GmbH | | DE | VKM |
| 6 | TRGAZ | TRANSGAZ S.A. | | AT | VKM |
| 7 | TRGC | THOMAS RIGGING & CONSTRUCTION CO IN | | | SCAC4 |
| 8 | TRGE | TARGET CORPORATION | | | SCAC4 |
| 9 | TRGF | TRANSPORT ROLLAND GAUTHIER & FILS I | | | SCAC4 |
| 10 | TRGH | TRANSCO | | | SCAC4 |
| 11 | TRGJ | TRANSPORTES REFRIGERADOS GARCES | | | SCAC4 |
| 12 | TRGP | TRANSPORT GERMAIN POULIN INC | | | SCAC4 |
| 13 | TRGQ | TRANSPORTES GARCIA | | | SCAC4 |
| 14 | TRGT | TRIANGLE TRANSPORT INC | | | SCAC4 |
| 15 | TRGU | TRIGAS EXPORT CA | | YV | BIC |
| 16 | TRGV | TRANSPORTADORA RIO GRANDE SA DE CV | | | SCAC4 |
| 17 | TRGX | Terminal Grain Corp. | added 7/1974; 1/1975-1/1980; eliminated 7/1993 | | NAKINA |
| 18 | TRGX | Upper Merion and Plymouth Leasing Co. | added 7/1993; 1/1994; eliminated 4/1996 | | NAKINA |
| 19 | TRGX | First Union Rail | added 4/1996; 7/2000-7/2005 | | NAKINA |
| 20 | TRGX | Terminal Grain Corp. | added 7/74; 1/75-1/80; eliminated 7/93 | | NRHS |
| 21 | TRGX | Upper Merion and Plymouth Leasing Co. | added 7/93; 1/94; eliminated 4/96 | | NRHS |
| 22 | TRGX | First Union Rail | added 4/96; 7/2000 | | NRHS |
| 23 | TRGX | *TERMINAL GRAIN CORP. | | | PWRC |
| 24 | TRGX | +FIRST UNION RAIL [(UMPX) UPPER MERION AND PLYMOUTH LEASING COMPANY] | | | PWRC |
| 25 | TRGX | Terminal Grain Corporation | | | RSRV |
| 26 | TRGX | FIRST UNION RAIL | | | SCAC4 |
