| 1 | ICS | International Charter Services, S.A. de C.V. | Callsign: Interservi, | MEX | AVCODES |
| 2 | ICS | ICS Inter Ceil Service | Name changed from Intercargo Service. Associated with Air Charter, Air Inter, E.A.S and TAT | F | AVCODES |
| 3 | ICS | Intercargo Service | Name changed to ICS Inter Ceil Service. Associated with Air Charter, Air Inter, E.A.S and TAT | F | AVCODES |
| 4 | ICS | CHC Ireland Designated Activity Company | Callsign: Irish Coastguard, Name changed from Bond Helicopters (Ireland) Limited. | IRL | AVCODES |
| 5 | ICS | International Charter Services | | | ICAO1 |
| 6 | ICSA | INTER-CON TRANSPORTATION SERVICES C | | | SCAC4 |
| 7 | ICSB | INNOVATIVE COURIER SOLUTIONS INC | | | SCAC4 |
| 8 | ICSC | INTERNATIONAL CORE SUPPLY INC | | | SCAC4 |
| 9 | ICSF | INVENTORY CONTROL SERVICES INC | | | SCAC4 |
| 10 | ICSG | ICS LOGISTICS LLC | | | SCAC4 |
| 11 | ICSJ | INNOVATIVE CONTROL SOLUTIONS | | | SCAC4 |
| 12 | ICSM | INDUSTRIAL CONTRACTING SOLUTIONS IN | | | SCAC4 |
| 13 | ICSO | IBEX CONTAINER SERVICES | | | SCAC4 |
| 14 | ICSP | ICS PETROLEUM LTD | | | SCAC4 |
| 15 | ICSQ | INDUSTRIAL CARTAGE SERVICE INC | | | SCAC4 |
| 16 | ICSS | INTERNATIONAL COSMETICS | | | SCAC4 |
| 17 | ICST | ICS TECHNOLOGIES | | | SCAC4 |
| 18 | ICSU | TRITON CONTAINER INTERNATIONAL LTD | | BM | BIC |
| 19 | ICSU | (REAZ) TRANSAMERICA LEASING, INC. | | | PWRC |
| 20 | ICSU | TAL International | | | RSRV |
| 21 | ICSU | TRANSAMERICA ICS, INC. | | | SCAC3 |
| 22 | ICSU | TRANSAMERICA LEASING INC | | | SCAC4 |
| 23 | ICSV | IMPULSE COURIER SERVICE INC | | | SCAC4 |
| 24 | ICSW | INTERSTATE CARGO SERVICES INC | | | SCAC4 |
| 25 | ICSZ | *ICS INDUSTRIES | | | PWRC |
| 26 | ICSZ | *UNION PACIFIC RAILROAD, (REAZ) TRANSAMERICA LEASING, INC. | | | PWRC |
| 27 | ICSZ | TAL International (Union Pacific Railroad) | | | RSRV |
| 28 | ICSZ | TRANSAMERICA ICS, INC. | | | SCAC3 |
| 29 | ICSZ | TRANSAMERICA LEASING INC | | | SCAC4 |
