List of reporting marks: I

I

 * IAIS - Iowa Interstate Railroad
 * IALU - Japan Line, Ltd
 * IANR - Iowa Northern Railway
 * IAPX - Liquid Air, Inc.; Air Liquide America Corporation
 * IARX - InStar, J.P. Morgan
 * 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 Company
 * IBYU - Tuscola and Saginaw Bay Railway
 * IC  - Illinois Central Railroad; Illinois Central Gulf 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
 * IDAC - Idaho Central Railroad; Boise Pacific Railroad
 * IDAX - Industria del Alcali, SA
 * IDCU - Ideal Container
 * IDOX - United States Department of Energy (Idaho Operations Office)
 * IDSZ - Industrial Distribution Service, Inc.
 * IDTX - Illinois Department of Transportation
 * 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.
 * IFRX - Infinity Rail
 * 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 Railway
 * 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 Rail Road
 * INSU - Intersub Services
 * INSX - Independent Salt Company
 * INT - Interstate Railroad; Norfolk Southern
 * INTU - Interpool Container Pty, Ltd.
 * INVX - Invista S.A.R.L.; Koch Rail, LLC
 * INYU - Infinity Transportation Logistics
 * 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
 * IPBX - INNOPHOS, Inc
 * IPCU - Independent Container Line
 * IPCX - International Paper
 * 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.
 * IRMX - Illinois Railway Museum
 * IRMZ - III Transportation
 * IRN - Conrail
 * IRRC - Iowa Railroad
 * IRRS - International Rail Road Systems, Inc.
 * IRSZ - Interpool/Rail Services, Ltd.
 * IRTX - Inter-Rail Transport
 * 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 Line
 * ITAX - Illinois Transit Assembly, Inc.
 * ITB - Illinois Terminal Belt
 * ITC - Illinois Terminal Railroad; Norfolk and Western Railroad; Norfolk Southern
 * ITCU - Intercontainer
 * ITCX - International Technologies Corporation
 * ITDX - SULCOM, Inc.
 * ITEU - Compagnia Italiana Investimenti Alternativi
 * ITFX - Infinity Transportation
 * 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
 * IVCX - Invista S.A.R.L.
 * IVLU - Ivarans Rederei, A/S
 * IXEU - Interox Quimica, SA
 * IXWU - Interox Chemicals, Ltd.