| 1 | ITX | IMAIR Airline | IATA: IK, Callsign: Improtex, IATA Prefix: 166, Founded in 1994. Ceased operations on 23 November 2009. | AZ | AVCODES |
| 2 | ITX | Imair Airlines | IATA: IK | | ICAO1 |
| 3 | ITX | International Minerals & Chemical Corp. | 1/1943-1/1946 | | NAKINA |
| 4 | ITX | International Agricultural Corp. | 8/1920-1/1941 | | NAKINA |
| 5 | ITX | International Agricultural Corp. | Apr-38 | | NRHS |
| 6 | ITX | *INTERNATIONAL AGRICULTURAL CORP. | | | PWRC |
| 7 | ITX | *INTERNATIONAL MINERALS & CHEMICAL CORP. | | | PWRC |
| 8 | ITXI | ITI | | | SCAC4 |
| 9 | ITXR | INTERMODAL TRANSPORTATION SERVICES | | | SCAC4 |
| 10 | ITXS | I T S EXPRESS INC | | | SCAC4 |
| 11 | ITXT | INTERNATIONAL TRANSPORT LLC | | | SCAC4 |
| 12 | ITXU | INTERPORT MAINTENANCE CO INC | | USA | BIC |
| 13 | ITXU | Interport Maintenance | | | RSRV |
| 14 | ITXU | INTERPORT MAINTENANCE CO INC | | | SCAC4 |
| 15 | ITXX | Tiaxcelteca de Industrias, S.A. de C.V. | 7/2000-7/2005 (not listed) | | NAKINA |
| 16 | ITXX | Tiaxcelteca de Industrias, S.A. de C.V. | Jul-00 | | NRHS |
| 17 | ITXX | TIAXCALTECA DE INDUSTRIAS SA DE CV (IMPULSORA TLAXCALTECA DE INDUSTRIAS) | | | PWRC |
| 18 | ITXX | Impulsora Tlaxcalteca de Industrias (Tlaxcalteca de Industrias de CV) | | | RSRV |
| 19 | ITXX | IMPULSORA TLAXCALTECA DE INDUSTRIAS | | | SCAC4 |
