| 1 | ITS | Aeronautica Interespacial, S.A. de C.V. | Callsign: Interspacial, | MEX | AVCODES |
| 2 | ITS | Inter-State Aviation, Inc. | Callsign: Inter-State, | USA | AVCODES |
| 3 | ITS | Inter-State Aviation | | | ICAO1 |
| 4 | ITS | Illinois Traction System (Illinois Terminal R.R. System) | 7/1930-7/1932 | | NAKINA |
| 5 | ITS | ILLINOIS TERMINAL RAILROAD SYSTEM (ILLINOIS TRACTION SYSTEM) | | | PWRC |
| 6 | ITSA | INTERCAT TRANSPORTATION INC | | | SCAC4 |
| 7 | ITSB | ITS LOGISTICS INC | | | SCAC4 |
| 8 | ITSC | ITS MAERSK | | | PWRC |
| 9 | ITSC | INCENTIVE TRANSPORTATION SERVICES I | | | SCAC4 |
| 10 | ITSD | INTERNATIONAL TRANSPORT SYSTEMS INC | | | SCAC4 |
| 11 | ITSE | IBERHANSAETIC TRANSP CO | | | PWRC |
| 12 | ITSF | INTEGRITY TRANSPORT SERVICE | | | SCAC4 |
| 13 | ITSG | INTERCONTINENTAL TRANSPORTATION SYS | | | SCAC4 |
| 14 | ITSH | ITSI | | | SCAC4 |
| 15 | ITSI | INTERSTATE TRUCK SERVICE | | | SCAC4 |
| 16 | ITSJ | ITS TRUCKING LLC | | | SCAC4 |
| 17 | ITSL | INTEGRATED TRANSPORTATION SOLUTIONS | | | SCAC4 |
| 18 | ITSN | INTERIOR STAINLESS INC | | | SCAC4 |
| 19 | ITSP | INTERSTATE SPECIALIZED INC | | | SCAC4 |
| 20 | ITSU | ISO TANK MANAGEMENT PTE LTD | | SGP | BIC |
| 21 | ITSU | IBERHANSAETIC TRANSPORT SYSTEM | | | PWRC |
| 22 | ITSU | Iberhansaetic Transport System | | | RSRV |
| 23 | ITSU | K LINE (KAWASAKI KISEN KAISHA LTD) | | | SCAC3 |
| 24 | ITSU | ISO TANKCONTAINER SALE | | | SCAC4 |
| 25 | ITSV | INTERSTATE VENTURES INC | | | SCAC4 |
| 26 | ITSW | INTERNATIONAL TRANSPORT SERVICES LL | | | SCAC4 |
| 27 | ITSZ | INTERNATIONAL TRANSPORTATION SERVICE, INC. | | | PWRC |
| 28 | ITSZ | International Transportation Service | | | RSRV |
| 29 | ITSZ | INTERNATIONAL TRANSPORTATION SERVIC | | | SCAC4 |
