| 1 | IND | Iona National Airways Limited | Callsign: Iona, Ceased operations on 14 December 1994. | IRL | AVCODES |
| 2 | IND | S Group International | Founded in 2013. Ceased operations. | KS | AVCODES |
| 3 | IND | Iona National Airways | | | ICAO1 |
| 4 | INDA | INDEL-DAVIS INC | | | SCAC4 |
| 5 | INDC | INDUSTRIAL CHEMICALS DIV. A. C. CORP. | | | PWRC |
| 6 | INDC | INDEPENDENT TRANSFER | | | SCAC4 |
| 7 | INDE | INDEPENDENT TRANSPORTATION INC | | | SCAC4 |
| 8 | INDF | INTER UNITED FREIGHTWAYS | | | SCAC4 |
| 9 | INDG | INDEPENDENT DIRT & DOZIER INC | | | SCAC4 |
| 10 | INDH | INDIANHEAD TRUCK LINE, INC. | | | SCAC1 |
| 11 | INDH | INDUSTRIAS SL SA DE CV | | | SCAC4 |
| 12 | INDI | INDIANA INTERSTATE | | | PWRC |
| 13 | INDI | INDUSTRIES LAPLANTE INC | | | SCAC4 |
| 14 | INDJ | INDEPENDENT TRANSPORT LLC | | | SCAC4 |
| 15 | INDK | INDUSTRIAS DURO SA DE CV | | | SCAC4 |
| 16 | INDL | INDUSTRIAL TRANSPORT INC | | | SCAC4 |
| 17 | INDM | INDUSTRIAS NEM DE MEXICO SA DE CV | | | SCAC4 |
| 18 | INDP | INLAND TRANSPORT INTERNATIONAL INC | | | SCAC4 |
| 19 | INDR | Industry railway | General prefix for for small industrial railways, factory shunters | X | TRAFFIC |
| 20 | INDS | INDUSTRIAL SERVICE CORP | | | SCAC4 |
| 21 | INDU | INDOX ENERGY SYSTEMS SL | | E | BIC |
| 22 | INDU | DOROTHEA MARINE ENTREPRISE AND MANAGEMENT | | | PWRC |
| 23 | INDU | Dorothea Marine Entreprise and Management | | | RSRV |
| 24 | INDU | DOROTHEA MARINE ENTERPRISE | | | SCAC1 |
| 25 | INDU | CONTAINER SERVICES COMPANY LLC | | | SCAC4 |
| 26 | INDX | Indelpro, S.A. de C.V. | 7/2000-7/2005 (not listed) | | NAKINA |
| 27 | INDX | Industrial Propane Supply, Inc. | added 10/1963; 7/1965-4/1970; eliminated 7/1974 | | NAKINA |
| 28 | INDX | Industrial Oil Corp. | 7/1935-4/1938 | | NAKINA |
| 29 | INDX | Industrial Oil Corp. | Apr-38 | | NRHS |
| 30 | INDX | Industrial Propane Supply, Inc. | 7/65-4/70; eliminated 7/74 | | NRHS |
| 31 | INDX | Indelpro, S.A. de C.V. | Jul-00 | | NRHS |
| 32 | INDX | *INDUSTRIAL OIL CORP. | | | PWRC |
| 33 | INDX | *INDUSTRIAL PROPANE SUPPLY, INC. | | | PWRC |
| 34 | INDX | +INDELPRO SA DE CV | | | PWRC |
| 35 | INDX | Indelpro de CV | | | RSRV |
| 36 | INDX | INDELPRO S A DE C V | | | SCAC4 |
| 37 | INDZ | INDUSTRIAL PARK | | | PWRC |
| 38 | INDZ | INDEPENDENT DISPATCH INC | | | SCAC4 |
