| 1 | IE | Solomon Airlines | ICAO: SOL, Callsign: Solomon, IATA Prefix: 193, | SOL | AVCODES |
| 2 | IE | Solomon Islands Airways Ltd. | Callsign: Solair, IATA Prefix: 193, | SOL | AVCODES |
| 3 | IE | Iarnrod Eireann (Coras Iompair Eireann) | | IE | VKM |
| 4 | IEA | Intermediacion Aerea S.L., Compania Aerea t/a InterMed | Callsign: Intermed, Established in 1997. Ceased operations in 2005. | E | AVCODES |
| 5 | IEA | Inter European Airways Ltd. | IATA: IP, Callsign: Aspro, Merged into Airtours International Airways Ltd on 02 September 1993. | GB | AVCODES |
| 6 | IEA | Inland Empire Airlines, Inc. | Callsign: Inland Empire, | USA | AVCODES |
| 7 | IEAF | Imperial Ethiopian Air Force | | ETH | TRAFFIC |
| 8 | IEAM | INVENTURE ENGINEERING AND | | | SCAC4 |
| 9 | IEAR | INFINITE ENTERPRISES INC | | | SCAC4 |
| 10 | IEAU | SEACO SRL | | BDS | BIC |
| 11 | IEAU | INTERMODAL EQUIPMENT ASSOCIATES | | | PWRC |
| 12 | IEAU | Intermodal Equipment Associates | | | RSRV |
| 13 | IEAU | CRONOS CONTAINERS LTD | | | SCAC4 |
| 14 | IEC | Iowa Chicago and Eastern R.R. Corp. | added 10/2002 | | NAKINA |
| 15 | IEC | EASTERN RAILROAD CORP. | | | PWRC |
| 16 | IECA | INTELLIGENT ENGINEERING (CANADA) LI | | | SCAC4 |
| 17 | IECC | IMPERIAL EVERGREEN CASKET CORPORATI | | | SCAC4 |
| 18 | IECD | IDEAL DELIVERIES INC | | | SCAC4 |
| 19 | IECD | ELECTROCENTRALE SA DEVA | | RO | VKM |
| 20 | IECL | INTERSTATE EXPRESS CARRIER LIMITED | | | SCAC4 |
| 21 | IECR | INTER ELECTRONICS CORP | | | SCAC4 |
| 22 | IECT | INTERNATIONAL PAPER (SPRINGHILL CON | | | SCAC4 |
| 23 | IECU | MARIANAS GAS CORPORATION DBA ISLAND EQUIPMENT CO | | GUM | BIC |
| 24 | IECU | ISLAND EQUIPMENT CO | | | SCAC4 |
| 25 | IECV | ITOCHU ENEX CO LTD | | | SCAC4 |
| 26 | IEDG | ISLE EDGE TRUCKING INC | | | SCAC4 |
| 27 | IEDI | INTRACOASTAL EXPEDITED & DELIVERY I | | | SCAC4 |
| 28 | IEDN | IOWA EXPRESS DELIVERY INC | | | SCAC4 |
| 29 | IEEL | INTERNATIONAL ENTERTAINMENT EQUIPME | | | SCAC4 |
| 30 | IEET | I E TRANSPORT INC | | | SCAC4 |
| 31 | IEFS | INLAND EMPIRE FREIGHT SYSTEMS INC | | | SCAC4 |
| 32 | IEI | Esercito Italiano | Callsign: Italian Army, | I | AVCODES |
| 33 | IEII | IMPORT-EXPORT IMPERIAL INC | | | SCAC4 |
| 34 | IEIN | IMER EXPRESS INC | | | SCAC4 |
| 35 | IEIQ | INTERMODAL EXPRESS INC | | | SCAC4 |
| 36 | IEIR | IRISH EXPRESS INC | | | SCAC4 |
| 37 | IEIS | INDIEN EXPRESS INC | | | SCAC4 |
| 38 | IEJ | Inflite Limited | Callsign: Swan, | GB | AVCODES |
| 39 | IEK | INAER Euskadi, S.A. | Callsign: Inaer Euskadi, | E | AVCODES |
| 40 | IELA | INVODANE ENGINEERING LTD | | | SCAC4 |
| 41 | IELC | INTEGRITY EXPRESS LOGISTICS LLC | | | SCAC4 |
| 42 | IELD | IRISH EXPRESS LTD | | | SCAC4 |
| 43 | IELE | INTERSTATE EXPRESS LLC | | | SCAC4 |
| 44 | IELI | INTEGRITY EXPRESS LOGISTICS | | | SCAC4 |
| 45 | IELN | INTERNATIONAL EXPRESS LOGISTICS INC | | | SCAC4 |
| 46 | IELO | INFINITE EXPRESS LOGISTICS LLC | | | SCAC4 |
| 47 | IELQ | IEL FORWARDING SYSTEM INC. | | | SCAC4 |
| 48 | IELT | I E L TRANSPORT INC | | | SCAC4 |
| 49 | IELU | INTERNATIONAL EQUIPMENT LEASING INC | | | SCAC4 |
| 50 | IELZ | IRAN EXPRESS LINES | | | PWRC |
| 51 | IELZ | Iran Express Lines | | | RSRV |
| 52 | IELZ | IRAN EXPRESS LINES | | | SCAC4 |
| 53 | IEMA | INTERSTATE EXPRESS MESSENGER | | | SCAC4 |
| 54 | IEMU | INTERNATIONAL EQUIPMENT MARKETING I | | | SCAC4 |
| 55 | IEP | Elipiu | Callsign: Elipiu, | I | AVCODES |
| 56 | IEPA | ITO EL PASO | | | SCAC4 |
| 57 | IEPI | INTERMODAL EXPRESS INC | | | SCAC4 |
| 58 | IEPN | INTERSTATE EXPRESS INC | | | SCAC4 |
| 59 | IEPS | INDUSTRIAS ELECTRONICAS PACIFICO SA | | | SCAC4 |
| 60 | IEQM | IRVING EQUIPMENT LTD | | | SCAC4 |
| 61 | IERR | Indiana Eastern Rd. LLC | added 10/2005; eliminated 1/2008 | | NAKINA |
| 62 | IERR | INDIANA EASTERN RAILROAD, LLC. | | | PWRC |
| 63 | IERR | INDIANA EASTERN RAILROAD LLC | | | SCAC4 |
| 64 | IERT | INDIANA EASTERN RAILROAD & TRANSPORTATION, INC. | | | PWRC |
| 65 | IERX | General American Transportation Corp. | 1/1950-1/1952; eliminated 10/1953 | | NAKINA |
| 66 | IERX | Inland-Empire Refineries Inc. | 1/1941-4/1947 | | NAKINA |
| 67 | IERX | General American Transportation Corp. | 1/52; eliminated 10/53 | | NRHS |
| 68 | IERX | *INLAND-EMPIRE REFINERIES, INC. | | | PWRC |
| 69 | IERX | *GENERAL AMERICAN TRANSPORTATION CORP | | | PWRC |
| 70 | IES | Gomel Engineer's Institute of the Ministry for Emergency Situations | | BY | AVCODES |
| 71 | IES | Inter-Island Air Services Ltd. | IATA: QW, Callsign: Inter Island, Desigantor QW recalled by IATA | WG | AVCODES |
| 72 | IESC | INTERNATIONAL EXHIBITION SERVICES I | | | SCAC4 |
| 73 | IESD | INGENIERIA EN SISTEMAS DE OPERACION | | | SCAC4 |
| 74 | IESG | INLAND EMPIRE STAGES LTD | | | SCAC4 |
| 75 | IESL | INTERNATIONAL EQUIPMENT SALES & LEA | | | SCAC4 |
| 76 | IESN | INTERRA ENERGY SERVICES INTERNATION | | | SCAC4 |
| 77 | IESO | INTERNATIONAL EQUIPMENT SALES CO | | | SCAC4 |
| 78 | IESP | INTERMODAL EXPRESS SERVICES INCORPO | | | SCAC4 |
| 79 | IESS | ITECH ENVIRONMENTAL SERVICES | | | SCAC4 |
| 80 | IESV | INTERNATIONAL ENVIRONMENTAL SERVICE | | | SCAC4 |
| 81 | IESW | IMPERIAL EAGLE SHIPPING LLC | | | SCAC4 |
| 82 | IESX | Alliant Energy | added 4/2000; 7/2000-7/2005 | | NAKINA |
| 83 | IESX | IES Utilities, Inc. | added 1/1996; eliminated 4/2000 | | NAKINA |
| 84 | IESX | Iowa Southern Utilities Co. | eliminated 1/1996 | | NAKINA |
| 85 | IESX | IESX Corp. | added 7/1981; eliminated 10/1987 | | NAKINA |
| 86 | IESX | Ivan E. Summa | added 4/1974; 1/1975-1/1980; eliminated 7/1981 | | NAKINA |
| 87 | IESX | Ivan E. Summa | added 4/74; 1/75-1/80; eliminated 7/81 | | NRHS |
| 88 | IESX | IESX Corp. | added 7/81; eliminated 10/87 | | NRHS |
| 89 | IESX | Iowa Southern Utilities Co. | eliminated 1/96 | | NRHS |
| 90 | IESX | IES Utilities, Inc. | added 1/96; eliminated 4/2000 | | NRHS |
| 91 | IESX | Alliant Energy | added 4/2000; 7/2000 | | NRHS |
| 92 | IESX | ALLIANT ENERGY [IES UTIITIES; IOWA SOUTHERN UTILITIES; IESX CORP.; IVAN E. SUMMA] | | | PWRC |
| 93 | IESX | IESX Corporation (Alliant Energy) | | | RSRV |
| 94 | IESX | ALLIANT ENERGY | | | SCAC4 |
| 95 | IETA | INLAND EMPIRE TRANSPORT | | | SCAC4 |
| 96 | IETH | IMPCO ECOTRANS TECHNOLOGIES | | | SCAC4 |
| 97 | IETL | IMPACT ENERGY TRANSPORT LLC | | | SCAC4 |
| 98 | IETR | ISLE EDGE TRUCKING | | | SCAC4 |
| 99 | IETT | | City: Istanbul | TR | TRAFFIC |
| 100 | IEVC | INGRAM EXCAVATING INC | | | SCAC4 |
