# Liste des sigles de l'AAR débutant par I
## I

* IAIS - Iowa Interstate Railroad
* IALU - Japan Line, Ltd
* IANR - Iowa Northern Railway
* IAPX - Liquid Air, Inc.; Air Liquide America Corporation
* IASZ - Iowa Interstate Railroad
* IAT - Iowa Terminal Railroad
* IATR - Iowa Traction Railroad
* IBCX - Indiana Boxcar Corporation
* IBNU - Interpool Container Pty, Ltd.
* IBPX - Merchants Despatch Transportation Corp.; IBP, Inc.; Trinity Industries Leasing Co. (Lessee: IBP, Inc.; Tyson Foods, Inc.)
* IBT - International Bridge and Terminal
* IBYU - Tuscola and Saginaw Bay Railway
* IC - Illinois Central Railroad; Illinois Central Gulf Railroad; Illinois Central Railroad; Canadian National Railway
* ICCU - ICCU Containers, Inc.
* ICCX - International Catalyst Corporation
* ICE - Iowa, Chicago and Eastern Railroad
* ICEU - Inter-Continental Equipment, Inc.
* ICEZ - GATX Capital Corporation
* ICG - Illinois Central Gulf Railroad; Illinois Central Railroad; Canadian National Railway
* ICGU - Illinois Central Railroad; Canadian National Railway
* ICGZ - Illinois Central Railroad; Canadian National Railway
* ICHU - Ingetra, AG
* ICIU - Intermodal Containers, Inc.
* ICIX - ICI Americas, Inc.
* ICIZ - Intermodal Containers, Inc.
* ICLU - International Container Leasing
* ICLX - Intercoastal Leasing, Inc.
* ICLZ - International Chassis Leasing, Inc.
* ICMU - Interox America
* ICMX - Illinois Cereal Mills, Inc.
* ICOU - Japan Line, Ltd.
* ICPU - Intermodal Container Pool, Inc.
* ICPZ - Intermodal Container Pool, Inc.
* ICRK - Indian Creek Railroad
* ICRU - Ingetra, AG
* ICRX - Island Creek Coal Company; Island Creek Corporation
* ICRZ - Illinois Central Railroad; Canadian National Railway
* ICSU - Transamerica Leasing, Inc.
* ICSZ - Transamerica Leasing, Inc.; Union Pacific Railroad
* IDAX - Industria del Alcali, SA
* IDCU - Ideal Container
* IDOX - Département de l'Énergie des États-Unis (Idaho Operations Office)
* IDSZ - Industrial Distribution Service, Inc.
* IEAU - Intermodal Equipment Associates
* IELZ - Iran Express Lines
* IESX - IESX Corporation; Alliant Energy
* IFBX - Indiana Farm Bureau Cooperative Association, Inc.; GE Rail Services Corporation
* IFCX - Interstate Foods Corporation
* IFLU - Interflow
* IFOX - Industrial Fuel Oil, Inc.
* IFSU - Interlink Freight Systems
* IFWZ - Independent Freightway, Inc.
* IGN - International-Great Northern
* IGPX - Industrial Steam Products
* IHAU - Ihora Chemical Industrial
* IHB - Indiana Harbor Belt Railroad
* IHCU -
* IHRC - Indiana Hi-Rail Corporation
* IHSX - Alberni Pacific Railway (Western Vancouver Island Heritage Society)
* IICZ - Illinois Central Railroad; Canadian National Railway
* IIIU - III Transportation
* IIIZ - III Transportation
* IILU - Independent Container Line
* IILZ - Independent Container Line
* IIRC - Indiana Interstate Railway
* IIRZ - III Transportation
* IKCU - Interpool
* IKKU - ICCU Containers, Inc.
* IKSU - Transamerica Leasing, Inc.
* ILDX - General Electric (Lighting Business Group)
* ILMU - Flow Line Transport
* ILSX - Independent Locomotive Service
* ILTU - International Liquid Transport Company, Bv
* ILW - Illinois Western Railroad
* IMCX - International Minerals and Chemical Corporation; IMC Global Operations
* IMEX - Indiana and Michigan Electric Company
* IMFX - General American Transportation Corporation
* IMMX - Industrial Minera Mexico, SA
* IMRL - Illinois and Missouri Rail Link; Iowa, Chicago and Eastern Railroad
* IMRR - Illinois and Midland Railroad
* IMSX - IMCO Services (a division of the Halliburton Company); International Mill Service
* IMSZ - Intermodal Systems, Inc.
* IMTX - Multifoods Transportation, Inc.; AG Processing, Inc.
* IMXZ - Intermodal Express, Inc.
* IN - Indiana Northeastern Railroad
* INCU - Intercontinental Transport, B.V.
* INCX - INCO, Ltd.
* INCZ - Intercontinental Transport, B.V.
* INCZ - Intercontinental Transport, B.V.
* INDU - Dorothea Marine Entreprise and Management
* INDX - Indelpro, SA de CV
* INFX - Infineum USA, Ltd.
* INGX - Ingomar Packing Company; GE Rail Services Corporation
* INKU - Interpool, Ltd.
* INLX - Inland Steel Coal Company; Incoal Company
* INOH - Indiana and Ohio Railroad
* INOX - Indiana and Ohio Rail Corporation
* INPR - Idaho Northern and Pacific Railroad
* INRD - Indiana Railroad
* INSU - Intersub Services
* INT - Interstate Railroad; Norfolk Southern
* INTU - Interpool Container Pty, Ltd.
* INTZ - Interpool, Ltd.
* IOCR - Indiana and Ohio Central Railroad
* IOCX - Rail Enterprises, Inc.
* IOLU - Textainer Equipment Management (US), Ltd.
* IOPX - Iowa Power and Light Company; MidAmerican Energy Company
* IORY - Indiana and Ohio Railway
* IPCU - Independent Container Line
* IPCX - International Paper Company
* IPEX - Indeck Power Equipment Company
* IPLX - Illinois Power Company
* IPOX - A and R Leasing, LLP
* IPPX - Intermountain Power Agency
* IPSX - Midwest Energy Services Company; General American Marks Company
* IPWX - Interstate Power Company; Alliant Energy
* IQIX - Industria Quimica Del letmo, SA de CV
* IR - Illinois RailNet
* IREX - IRECO, Inc.
* IRLX - Western Railroad Supply, Inc.
* IRMZ - III Transportation
* IRN - Conrail
* IRRC - Iowa Railroad
* IRRS - International Rail Road Systems, Inc.
* IRSZ - Interpool/Rail Services, Ltd.
* ISCU - I.S.C. Chemicals, Ltd.
* ISCX - ISC, Inc.
* ISG - ISG Railways
* ISIZ - Intermodal Services, Inc.
* ISLU - Islandia, Ltd.
* ISPX - Western Company of North America
* ISR - Iowa Southern Railroad
* ISRR - Indiana Southern Railroad
* ISSR - ISS Rail, Inc.
* ISSU - Iceland Steamship Company, Ltd.
* ISU - Iowa Southern Utilities (Southern Industrial Railroad)
* ISW - Indiana Southwestern Railway
* ITAU - Italian Lines
* ITAX - Illinois Transit Assembly, Inc.
* ITB - Island Tug and Barge
* ITC - Illinois Terminal Railroad; Norfolk and Western Railroad; Norfolk Southern
* ITCU - Intercontainer
* ITCX - International Technologies Corporation
* ITDX - SULCOM, Inc.
* ITEU - Compagnia Italiana Investimenti Alternativi
* ITGX - ITG, Inc.
* ITIU - International Transchem, Inc.
* ITIX - Intermodal Technologies, Inc.
* ITKU - Intertank, Ltd.
* ITLU - Itel Containers International Corporation
* ITLX - GE Rail Services Corporation
* ITRU - Itel Containers International Corporation
* ITSU - Iberhansaetic Transport System
* ITSZ - International Transportation Service, Inc.
* ITTX - Trailer Train Company, TTX Company
* ITXX - Tiaxcalteca de Industrias, SA de CV
* IU - Indianapolis Union
* IVLU - Ivarans Rederei, A/S
* IXEU - Interox Quimica, SA
* IXWU - Interox Chemicals, Ltd.