| 8001 | TPZC | TPA TRUCKING | | | SCAC4 |
| 8002 | TPZF | TRANSPORT ZAFFIS | | | SCAC4 |
| 8003 | TPZL | TRANSPLACE INTERNATIONAL INC (LTL D | | | SCAC4 |
| 8004 | TPZM | TRANSPORTES ZAMORA | | | SCAC4 |
| 8005 | TPZW | TRAPEZITZA MARITIME LTD | | | SCAC4 |
| 8006 | TQ | Tandem Aero Ltd. | ICAO: TDM, Callsign: Tandem, IATA Prefix: 038, Designator TQ reinstated by IATA. Ceased operations in April 2019. | MD | AVCODES |
| 8007 | TQ | Transwede Airways AB | ICAO: TWE, Transwede Airways merged into Braathens. Transwede Leisure merged in Blue Scandinavia during 1998. | S | AVCODES |
| 8008 | TQ | Tradair Ltd. | Callsign: Tradair, | GB | AVCODES |
| 8009 | TQ | Tailwind Air, LLC | ICAO: PGN, Callsign: Pergrine, Name changed from Volo Aviation, LLC. | USA | AVCODES |
| 8010 | TQAB | TORTILLAS SABINAS | | | SCAC4 |
| 8011 | TQAC | TRANSPORTES QUEZADA | | | SCAC4 |
| 8012 | TQAE | TOTAL QUALITY ASSURANCE LLC | | | SCAC4 |
| 8013 | TQAG | TRANSPORT AG | | | SCAC4 |
| 8014 | TQAH | TRANS AM FREIGHT | | | SCAC4 |
| 8015 | TQAI | TFS LOGISTICS USA INC | | | SCAC4 |
| 8016 | TQAM | TRANS-AM SEA FREIGHT (HK) LTD | | | SCAC4 |
| 8017 | TQAS | TRASA | | | SCAC4 |
| 8018 | TQAV | TRANS-QUEBEC AUDIO VISUEL | | | SCAC4 |
| 8019 | TQB | Tobruk Air Transport and Cargo | IATA: 7T, Callsign: Tobruk Air, | LAR | AVCODES |
| 8020 | TQBD | TRANSQUIMICA BINACIONAL SA DE CV | | | SCAC4 |
| 8021 | TQBE | TRANSPORT QUEBEC-AM INC | | | SCAC4 |
| 8022 | TQBL | TRANSPORT COULOMBE | | | SCAC4 |
| 8023 | TQCE | TRANSPORT CIRCUIT EXPRESS INC | | | SCAC4 |
| 8024 | TQCG | TRAILCON LOGISTICS LLC | | | SCAC4 |
| 8025 | TQCM | TRANSPORT CARL MAHEUX | | | SCAC4 |
| 8026 | TQDA | THOMPSON, DALE | | | SCAC4 |
| 8027 | TQDF | TRANSCORR LLC (DEDICATED FLEET) | | | SCAC4 |
| 8028 | TQDR | TRANSPORTES RORO SA DE CV | | | SCAC4 |
| 8029 | TQDS | TRANSPORT DANY JACQUES ENR | | | SCAC4 |
| 8030 | TQDU | CHONGQING TONGQU SPECIAL VEHICLE MANUFACTURING CO.,LTD. | | PRC | BIC |
| 8031 | TQE | Taxair Mexiquenses, S.A. De C.V. | Callsign: Taxair, | MEX | AVCODES |
| 8032 | TQEP | TRIANGLE FAITH S A | | | SCAC4 |
| 8033 | TQER | TRANSPORTES ESPECIALIZADOS RUIZ | | | SCAC4 |
| 8034 | TQEX | U.S. Rail Services | added 7/1989; 1/1994; eliminated 4/1994 | | NAKINA |
| 8035 | TQEX | USL Capital Rail Services | added 4/1994; eliminated 10/1996 | | NAKINA |
| 8036 | TQEX | First Union Rail | added 10/1996; 7/2000-7/2005 | | NAKINA |
| 8037 | TQEX | U.S. Rail Services | added 7/89; 1/94; eliminated 4/94 | | NRHS |
| 8038 | TQEX | USL Capital Rail Services | added 4/94; eliminated 10/96 | | NRHS |
| 8039 | TQEX | First Union Rail | added 10/96; 7/2000 | | NRHS |
| 8040 | TQEX | FIRST UNION RAIL [(RUSX) USL CAPITAL RAIL SERVICES] | | | PWRC |
| 8041 | TQEX | First Union Rail | | | RSRV |
| 8042 | TQF | UK Royal VIP Helicopter Flights | Callsign: Rainbow, ICAO designator changed to TKF. | GB | AVCODES |
| 8043 | TQF | United Kingdom Royal VIP Flights | | | ICAO1 |
| 8044 | TQFL | TRANSPORTES ESPECIALIZADOS SAN RAFA | | | SCAC4 |
| 8045 | TQFM | T & T FARM | | | SCAC4 |
| 8046 | TQFR | TRANSFREIGHT LLC | | | SCAC4 |
| 8047 | TQFS | TRIPLE J FARMS | | | SCAC4 |
| 8048 | TQGC | TRANSPORTS REGI INC | | | SCAC4 |
| 8049 | TQGE | TRANSPORTES GEES | | | SCAC4 |
| 8050 | TQGI | TIME LOGISTICS INC | | | SCAC4 |
| 8051 | TQGL | TRANSPORT ROGER OUELLET INC | | | SCAC4 |
| 8052 | TQHC | TRANSCHEMICAL INCORPORATED | | | SCAC4 |
| 8053 | TQIO | TEAM TRANSPORTATION INC | | | SCAC4 |
| 8054 | TQJB | TJB | | | SCAC4 |
| 8055 | TQJC | TSJ CONSOLIDATORS INC | | | SCAC4 |
| 8056 | TQJL | TRANSPORT JACQUES LEGAULT & FILS IN | | | SCAC4 |
| 8057 | TQKC | TUTLE LIQUID TANK LLC | | | SCAC4 |
| 8058 | TQLC | T & T SALES INC | | | SCAC4 |
| 8059 | TQLF | TOTAL TRANSFER | | | SCAC4 |
| 8060 | TQLL | TQ LOGISTICS | | | SCAC4 |
| 8061 | TQLO | TRANSTATE LOGISTICS INC | | | SCAC4 |
| 8062 | TQLS | TRS LOGISTICS INC | | | SCAC4 |
| 8063 | TQLT | TRIPLE T TRUCKING INC | | | SCAC4 |
| 8064 | TQLV | TOTAL QUALITY LOGISTICS SERVICES IN | | | SCAC4 |
| 8065 | TQLY | TRADE LOGISTICS CORPORATION | | | SCAC4 |
| 8066 | TQM | JM Family Aviation | Callsign: Tacoma, ICAO designator changed to TKM | USA | AVCODES |
| 8067 | TQM | JM Family Aviation | | | ICAO1 |
| 8068 | TQMB | TRANSPORTES JMB | | | SCAC4 |
| 8069 | TQMD | TRANSPORTES MENDOZA | | | SCAC4 |
| 8070 | TQME | TIMM ENTERPRISES LIMITED | | | SCAC4 |
| 8071 | TQMG | TOTAL METAL RECYCLING INC | | | SCAC4 |
| 8072 | TQMH | TRANSOUTH MOTORCOACH LLC | | | SCAC4 |
| 8073 | TQMM | TMM CAR CARRIERS S A DE CV | | | SCAC4 |
| 8074 | TQMR | TRANSPORT MTR | | | SCAC4 |
| 8075 | TQMS | TOMASSO BROS | | | SCAC4 |
| 8076 | TQMU | INTERMODAL TANK TRANSPORT INC. | | USA | BIC |
| 8077 | TQMU | Intermodal Tank Transport | | | RSRV |
| 8078 | TQMU | INTERMODAL TANK TRANSPORT INC | | | SCAC4 |
| 8079 | TQMV | TRANSPORTES MON-RO S A DE C V | | | SCAC4 |
| 8080 | TQMX | THOR QUIMICOS DE MEXICO SA DE CV | | | PWRC |
| 8081 | TQMX | THOR QUIMICOS DE MEXICO S A DE C V | | | SCAC4 |
| 8082 | TQN | Taquan Air Services, Inc. | IATA: K3, Callsign: Taquan, Designator K3* recalled by IATA | USA | AVCODES |
| 8083 | TQN | Venture Travel, LLC. t/a Taquan Air | IATA: K3, Callsign: Taquan, Designator K3* reinstated by IATA. IATA designator changed from H7* | USA | AVCODES |
| 8084 | TQN | Taquan Air Services | | | ICAO1 |
| 8085 | TQNC | TARNEL USA INC | | | SCAC4 |
| 8086 | TQNE | TRANSEC INTERNATIONAL INC USA | | | SCAC4 |
| 8087 | TQNM | TRANSPORTES INTERNACIONALES MEDRANO | | | SCAC4 |
| 8088 | TQNN | TRANS-OSCAR INC | | | SCAC4 |
| 8089 | TQNP | TRAILER NET TRANSPORT | | | SCAC4 |
| 8090 | TQNT | TNT TRUCKING | | | SCAC4 |
| 8091 | TQOC | TANNCO TRANSPORT INC | | | SCAC4 |
| 8092 | TQOI | TRIANGLE OIL CO | | | SCAC4 |
| 8093 | TQOM | TORMART | | | SCAC4 |
| 8094 | TQPD | TRANSPUENTES 3 POLOS SA DE CV | | | SCAC4 |
| 8095 | TQPH | TRANSPORTES APACHE | | | SCAC4 |
| 8096 | TQPM | TRIBAL PETROLEUM SUPPLIERS | | | SCAC4 |
| 8097 | TQPN | TIP TIPTON | | | SCAC4 |
| 8098 | TQPP | THERMO PETROLEUM PRODUCTS INC | | | SCAC4 |
| 8099 | TQPR | TPR TRUCKING INC | | | SCAC4 |
| 8100 | TQPS | TRIPPS, LLC | | | SCAC4 |
