| 1 | INC | Jet Air Internacional Charters, C.A. | Callsign: Interchart, | YV | AVCODES |
| 2 | INC | Insel Air International N.V. | IATA: 7I, Callsign: Insel Air, IATA Prefix: 958, Ceased operations on 16 February 2019. | NA | AVCODES |
| 3 | INC | Insel Air International | | | ICAO1 |
| 4 | INC | COMMER | | | SCAC4 |
| 5 | INCA | INTER-COASTAL INC | | | SCAC4 |
| 6 | INCB | INDEPENDENT TRANSFER SERVICES INC | | | SCAC4 |
| 7 | INCC | INSPIRATION CONSOLIDATED COPPER CO. | | | PWRC |
| 8 | INCE | INCE DENIZCILIK VE TIC A S | | | SCAC4 |
| 9 | INCF | INTERSTATE CONTAINER | | | SCAC4 |
| 10 | INCH | INTERCHANGE COMPANY INC | | | SCAC4 |
| 11 | INCJ | INTERCHANGE GROUP INC | | | SCAC4 |
| 12 | INCK | INKEL, ADRIEN TRUCKING INC | | | SCAC4 |
| 13 | INCN | INTERCONNECT INC | | | SCAC4 |
| 14 | INCO | INSTANT COURIER | | | SCAC4 |
| 15 | INCQ | INCHCAPE SHIPPING SERVICES | | | SCAC4 |
| 16 | INCT | INTERNATIONAL CARRIERS (TILBURY) IN | | | SCAC4 |
| 17 | INCU | INNOVACION CONTENEDOR PTE LTD | | SGP | BIC |
| 18 | INCU | INTERCONTINENTAL TRANSPORT B.V. (ICT) | | | PWRC |
| 19 | INCU | Intercontinental Transport | | | RSRV |
| 20 | INCU | INTERCONTINENTAL TRANSPOR0 (ICT) BV | | | SCAC4 |
| 21 | INCV | INTERSTATE CARTAGE COMPANY INC | | | SCAC4 |
| 22 | INCW | INTERCITY LINES INC | | | SCAC4 |
| 23 | INCX | Inco Ltd. | added 4/1990; 1/1994-7/2005; eliminated 10/2005 | | NAKINA |
| 24 | INCX | Inco Ltd. | added 4/90; 1/94-7/2000 | | NRHS |
| 25 | INCX | INCO LIMITED | | | PWRC |
| 26 | INCX | Inco Railway | | | RSRV |
| 27 | INCX | VALE INCO LIMITED | | | SCAC4 |
| 28 | INCX | Inco Ltd. | | USA | TRAFFIC |
| 29 | INCY | INTERNATIONAL FREIGHT SERVICES | | | SCAC4 |
| 30 | INCZ | INTERCONTINENTAL TRANSPORT B.V. (ICT) | | | PWRC |
| 31 | INCZ | Intercontinental Transport | | | RSRV |
| 32 | INCZ | Intercontinental Transport | | | RSRV |
| 33 | INCZ | INTERCONTINENTAL TRANSPORT B.V. (IC | | | SCAC4 |
