| 1 | ISI | Sky Line | Callsign: Irina, | GE | AVCODES |
| 2 | ISI | Island Air | | | ICAO1 |
| 3 | ISIA | INLINE SUPPLY INC | | | SCAC4 |
| 4 | ISIE | ISI EXPRESS (N Y) INC | | | SCAC4 |
| 5 | ISIG | INDUSTRIAL SEATING INCORPORATED | | | SCAC4 |
| 6 | ISII | INDUSTRIAL STITCHTECH INC | | | SCAC4 |
| 7 | ISIL | I S I LIVESTOCK | | | SCAC4 |
| 8 | ISIN | INDUSTRIAL SALES INC | | | SCAC4 |
| 9 | ISIP | ISI LOGISTICS SOUTH INC | | | SCAC4 |
| 10 | ISIQ | ISI | | | SCAC4 |
| 11 | ISIU | ISI AUTOMOTIVE AUSTRIA GMBH | | A | BIC |
| 12 | ISIV | ISI | | | SCAC4 |
| 13 | ISIZ | INTERMODAL SERVICES, INC. | | | PWRC |
| 14 | ISIZ | Intermodal Services | | | RSRV |
| 15 | ISIZ | INTERMODAL SERVICES, INC. | | | SCAC4 |
