| 1 | ITM | Itapemirim Transportes Aereos S.A. | IATA: 5W, Designator 5W* recalled by IATA / Designator 5W* reinstated by IATA. Designator changed from K9*. Branded as Itapemirim Cargo. | BR | AVCODES |
| 2 | ITM | Itapemirim Transportes Aereos S.A. | IATA: K9, IATA designator changed to 5W*. Branded as Itapemirim Cargo. | BR | AVCODES |
| 3 | ITM | Tab Associates, Inc. d/b/a Island Tyme | Callsign: Island Tyme, | USA | AVCODES |
| 4 | ITMA | ITALIA MARITIMMA S P A | | | SCAC4 |
| 5 | ITMC | INTERMECCANICA INTERNATIONAL INC | | | SCAC4 |
| 6 | ITMD | INTERMODAL TRANSPORTATION SERVICES | | | SCAC4 |
| 7 | ITMI | INTEGRITY TOOL & MOLD INC | | | SCAC4 |
| 8 | ITMM | ILCHUK TREE MOVER MFG LTD | | | SCAC4 |
| 9 | ITMN | ITM LINE | | | SCAC4 |
| 10 | ITMQ | I T C MARITIME AERIEN INC | | | SCAC4 |
| 11 | ITMR | INTERMARINE INC. | | | SCAC1 |
| 12 | ITMS | INTERNATIONAL MOVING & STORAGE INC | | | SCAC4 |
| 13 | ITMU | IMPRESA TRANSPORTI DI FRANCESCO MUS | | | SCAC4 |
| 14 | ITMV | ITM LOGISTICS | | | SCAC4 |
| 15 | ITMZ | INDIANA TRANSPORTATION MUSEUM | | | PWRC |
