Real world company prefixes
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I& IA IB IC ID IE IF IG IH II IJ IK IL IM IN IO IP IQ IR IS IT IU IV IW IX IY IZ
ISA ISB ISC ISD ISE ISF ISG ISH ISI ISK ISL ISM ISN ISO ISP ISR ISS IST ISU ISV ISW ISX ISY
I& IA IB IC ID IE IF IG IH II IJ IK IL IM IN IO IP IQ IR IS IT IU IV IW IX IY IZ
ISA ISB ISC ISD ISE ISF ISG ISH ISI ISK ISL ISM ISN ISO ISP ISR ISS IST ISU ISV ISW ISX ISY
| 1 | ISAA | ISAACS MOVING & STORAGE | SCAC4 | ||
| 2 | ISAE | ISAAC, LEON | SCAC4 | ||
| 3 | ISAF | ISAF SA | RO | VKM | |
| 4 | ISAF | ISLAND SUPERIOR AIR FILTERS | SCAC4 | ||
| 5 | ISAH | IONICS MASS SPECTROMETRY GROUP INC | SCAC4 | ||
| 6 | ISAM | ISAM S.r.l. | IT | VKM | |
| 7 | ISAN | INLAND STATE AIR ENTERPRISES INC | SCAC4 | ||
| 8 | ISAP | INTERNATIONAL SEA & AIR SHIPPING | SCAC4 | ||
| 9 | ISAR | ISARIC TRANSPORT INC | SCAC4 | ||
| 10 | ISAU | NORDIC BULKERS AB | SCAC4 | ||
| 11 | ISAW | INLACO SAIGON | SCAC4 | ||
| 12 | ISAY | INTERNATIONAL SHIPPING AND LOGISTIC | SCAC4 | ||
| 13 | ISBC | INTEQUIP MINING SALES & SERVICES LT | SCAC4 | ||
| 14 | ISBL | ISABELLA SHIPOWNER S A | SCAC4 | ||
| 15 | ISBU | SEABOARD SYSTEM RAILROAD | SCAC4 | ||
| 16 | ISC | ISC-INTERPORTO Servizi Cargo S.P.A. | IT | VKM | |
| 17 | ISCB | ISABELLA SHIPPING COMPANY | SCAC1 | ||
| 18 | ISCB | ISABELLA SHIPPING COMPANY LTD BERMU | SCAC4 | ||
| 19 | ISCC | INTERNATIONAL SHIPPING COMPANY INC. | SCAC4 | ||
| 20 | ISCF | INTERNATIONAL STONE CONCEPTS | SCAC4 | ||
| 21 | ISCG | INDUSTRIAL SERVICES CONTRACTORS INC | SCAC4 | ||
| 22 | ISCI | INTERNATIONAL TRANSPORT EXPRESS COR | SCAC4 | ||
| 23 | ISCL | INDIA STEAMSHIP (A DIV OF | SCAC4 | ||
| 24 | ISCO | INTERMODAL SALES CORPORATION | SCAC4 | ||
| 25 | ISCP | INSTRON CORP | SCAC4 | ||
| 26 | ISCQ | INTEGRITY SHIPPING CORP | SCAC4 | ||
| 27 | ISCR | INLAND SEAFOOD CORP | SCAC4 | ||
| 28 | ISCT | INTRINSIC TRANSPORT INC | SCAC4 | ||
| 29 | ISCU | I.S.C. CHEMICALS LTD. | PWRC | ||
| 30 | ISCU | I.S.C. Chemicals | RSRV | ||
| 31 | ISCX | Illinois Steel Co. (Carnegie-Illinois Steel Corp.) | Apr-38 | NRHS | |
| 32 | ISCX | *CARNEGIE-ILLINOIS STEEL CORP. [ILLINOIS STEEL CO. TANK LINE] | PWRC | ||
| 33 | ISCX | *INTERNATIONAL SUGAR CO. [IMPERIAL SUGAR CO.] | PWRC | ||
| 34 | ISCX | *INTERLAKE, INC. [INTERLAKE STEEL CORP.] | PWRC | ||
| 35 | ISCX | +ISC, INC. | PWRC | ||
| 36 | ISCX | ISC, Inc. | 1/1994-7/2005 | NAKINA | |
| 37 | ISCX | Interlake, Inc. | added 4/1971; 1/1975; eliminated 7/1976 | NAKINA | |
| 38 | ISCX | Interlake Steel Corp. | added 7/1965 (reporting marks changed from IICX); 7/1965-10/1966; eliminated 10/1967 | NAKINA | |
| 39 | ISCX | International Sugar Co. | eliminated 10/1960 | NAKINA | |
| 40 | ISCX | Imperial Sugar Co. | added 7/1960 | NAKINA | |
| 41 | ISCX | Carnegie-Illinois Steel Corp. | 7/1937-4/1938 | NAKINA | |
| 42 | ISCX | Illinois Steel Co. | 7/1935 | NAKINA | |
| 43 | ISCX | Illinois Steel Co. Tank Line | 8/1920-7/1932 | NAKINA | |
| 44 | ISCX | Illinois Steel Company (ISC Inc.) | RSRV | ||
| 45 | ISCX | ISC INC | SCAC4 | ||
| 46 | ISCX | Imperial Sugar Co. | added 7/60 | NRHS | |
| 47 | ISCX | International Sugar Co. | eliminated 10/60 | NRHS | |
| 48 | ISCX | Interlake Steel Corp. | added 7/65 (reporting marks changed from IICX); 7/65-10/66; eliminated 10/67 | NRHS | |
| 49 | ISCX | Interlake, Inc. | added 4/71; 1/75; eliminated 7/76 | NRHS | |
| 50 | ISCX | ISC, Inc. | 1/94-7/2000 | NRHS | |
| 51 | ISD | ISD Avia | ICAO1 | ||
| 52 | ISDE | IRONSIDE ENTERPRISES INC | SCAC4 | ||
| 53 | ISDO | INSIDEOUT ART | SCAC4 | ||
| 54 | ISES | ISLAND ENTERPRISES | SCAC4 | ||
| 55 | ISEU | I C E SERVICE GROUP INC | SCAC4 | ||
| 56 | ISF | International Sabilisation Assistance Force | ICAO1 | ||
| 57 | ISFD | ISF TRADING INC | SCAC4 | ||
| 58 | ISFF | INTERSCAN SCHIFFAHRTSGESELLSCHAFT M | SCAC4 | ||
| 59 | ISFN | ICICLE SEAFOODS INC | SCAC4 | ||
| 60 | ISFR | ISAAC FREIGHT LIMITED | SCAC4 | ||
| 61 | ISFX | INTERNATIONAL SUGAR FEED CO. | PWRC | ||
| 62 | ISFX | International Sugar Feed Co. | 8/1920-7/1923 | NAKINA | |
| 63 | ISFZ | SEACASTLE CHASSIS | SCAC4 | ||
| 64 | ISG | Club Air | IATA: 6P | ICAO1 | |
| 65 | ISG | ISG RAILWAYS | PWRC | ||
| 66 | ISG | ISG Railways | RSRV | ||
| 67 | ISGE | ISG EXPRESS INC | SCAC4 | ||
| 68 | ISGI | INTERSTATE SERVICE GROUP INC | SCAC4 | ||
| 69 | ISGL | INTERMODAL SOLUTIONS GROUP LLC | SCAC4 | ||
| 70 | ISGT | ISG TRANSPORTATION INC | SCAC4 | ||
| 71 | ISGU | INCHCAPE SHIPPING SERVICE | SCAC4 | ||
| 72 | ISGX | INTERNATIONAL STEEL GROUP d/b/a ISG BURNS HARBOR, INC. | PWRC | ||
| 73 | ISGX | International Steel Group d/b/a ISG Burns Harbor, Inc. | 7/2005 (not listed) | NAKINA | |
| 74 | ISGX | INTERNATIONAL STEEL GROUP D/B/A ISG | SCAC4 | ||
| 75 | ISHI | INTER SHIP INC | SCAC4 | ||
| 76 | ISHN | INKEL, STEPHANE INC | SCAC4 | ||
| 77 | ISHU | ISLAND SHIPPING LINE LTD. | SCAC4 | ||
| 78 | ISHX | INTERSTATE SHREDDING LLC | SCAC4 | ||
| 79 | ISI | Island Air | ICAO1 | ||
| 80 | ISIA | INLINE SUPPLY INC | SCAC4 | ||
| 81 | ISIE | ISI EXPRESS (N Y) INC | SCAC4 | ||
| 82 | ISIG | INDUSTRIAL SEATING INCORPORATED | SCAC4 | ||
| 83 | ISII | INDUSTRIAL STITCHTECH INC | SCAC4 | ||
| 84 | ISIL | I S I LIVESTOCK | SCAC4 | ||
| 85 | ISIN | INDUSTRIAL SALES INC | SCAC4 | ||
| 86 | ISIP | ISI LOGISTICS SOUTH INC | SCAC4 | ||
| 87 | ISIQ | ISI | SCAC4 | ||
| 88 | ISIV | ISI | SCAC4 | ||
| 89 | ISIZ | INTERMODAL SERVICES, INC. | PWRC | ||
| 90 | ISIZ | Intermodal Services | RSRV | ||
| 91 | ISIZ | INTERMODAL SERVICES, INC. | SCAC4 | ||
| 92 | ISK | Intersky Luftfahrt | ICAO1 | ||
| 93 | ISKG | INTERSEE SCHIFFAHRTSGESELLSCHAFT MB | SCAC4 | ||
| 94 | ISKL | IST TRUCKING LTD | SCAC4 | ||
| 95 | ISL | Landsflug | ICAO1 | ||
| 96 | ISL | Infraserv Logistics GmbH | DE | VKM | |
| 97 | ISLA | ISLAND AIR SERVICE | SCAC4 | ||
| 98 | ISLC | ISLAND CARGO CONSOLIDATORS, INC. | SCAC1 | ||
| 99 | ISLC | ISOLAB INC | SCAC4 | ||
| 100 | ISLD | ISLAND TOWING LTD | SCAC4 |