| 1 | INS | Inflite The Jet Centre | www.inflite.co.uk | GB | AVCODES |
| 2 | INS | Instone Airline Ltd. | Callsign: Instone, | GB | AVCODES |
| 3 | INS | Inflite The Jet Centre | | | ICAO1 |
| 4 | INS | INLAND STEEL CORP. | | | PWRC |
| 5 | INSA | INSANA, PETE AUTO & BODY REPAIR & T | | | SCAC4 |
| 6 | INSA | \"Insa Gas\" OOD | | BG | VKM |
| 7 | INSB | INDUSTRIAS MELANG SRL DE CV | | | SCAC4 |
| 8 | INSB | Innsbrucker Verkehrsbetriebe und Stubaitalbahn GmbH | Real: IVB, City: Innsbruck | A | TRAFFIC |
| 9 | INSF | IN-SEASON FARMS LTD | | | SCAC4 |
| 10 | INSH | INLAND SEA INC, THE | | | SCAC4 |
| 11 | INSI | INSINGER PERFORMANCE INC | | | SCAC4 |
| 12 | INSK | INTERSTATE TRANSPORT INC | | | SCAC4 |
| 13 | INSM | INTRANSPORT SERVICES DE MEXICO S DE | | | SCAC4 |
| 14 | INSO | INTERNATIONAL SOLUTIONS INC | | | SCAC4 |
| 15 | INSQ | INSTAKILT | | | SCAC4 |
| 16 | INSR | INSTAR INC | | | SCAC4 |
| 17 | INST | INTERSTATE CONSOLIDATION, INC. | | | PWRC |
| 18 | INST | INTERSTATE CONSOLIDATION, INC | | | SCAC1 |
| 19 | INST | INSTA-INSULATION | | | SCAC4 |
| 20 | INSU | INSTANTA | | PL | BIC |
| 21 | INSU | INTERSUB SERVICES | | | PWRC |
| 22 | INSU | Intersub Services | | | RSRV |
| 23 | INSU | GENSTAR CONTAINER CORPORATION | | | SCAC4 |
| 24 | INSX | International Shoe Co. (General American Tank Car Corp.) | 7/1935 | | NAKINA |
| 25 | INSX | International Shoe Co., Wilkes Tannery | 7/1932 | | NAKINA |
| 26 | INSX | International Shoe Co., Burke Extract Plant | 7/1923-7/1930 | | NAKINA |
| 27 | INSX | *INTERNATIONAL SHOE CO. | | | PWRC |
| 28 | INSX | +INDEPENDENT SALT COMPANY | | | PWRC |
| 29 | INSX | Independent Salt | | | RSRV |
| 30 | INSX | INDEPENDENT SALT COMPANY | | | SCAC4 |
| 31 | INSY | INDALO SHIPPING TRANSPORT & CONSULT | | | SCAC4 |
