List of reporting marks: M
M
MAA - Magma Arizona RailroadMAAX - Maxx Leasing CompanyMACX - Mac AcquisitionsMADU - Magnum SpeditionsgelleshaftMAEU - Maersk LinesMAGX - Magnimet, Monroe Scrap DivisionMAIX - Macon Iron and Paper StockMAJU - Malaysian International Shipping CorporationMALX - Mid-America Locomotive and Car RepairMALZ - American President LinesMANX - Manchester Gas Company; Williams Energy VenturesMAPX - MAPCO Products Company; Williams Energy VenturesMARX - MidAmerican Energy CorporationMARZ - MARTRACMASX - GE Rail ServicesMATU - Matson Navigation CompanyMATX - Merchants Investment CompanyMATZ - Matson Navigation CompanyMAW - Maumee and Western RailroadMAXU - Maxu ContainersMAXX - MidAmerican Energy CompanyMAYW - Maywood and Sugar CreekMB - Meridian & Bigbee RailroadMBBX - Tank Car ServicesMBCX - MBCX LeasingMBFX - MBF IndustriesMBIX - Morse BrothersMBKX - MRC Rail ServicesMBLX - Exxon-Mobil CorporationMBPX - MacMillan-BloedellMBRR - Meridian & Bigbee RailroadMBSX - Mid-South Bulk ServicesMBT - Marianna and Blountstown RailroadMBTX - Massachusetts Bay Transportation AuthorityMC - Michigan Central Railroad; New York Central Railroad; Penn Central; Maine Coast Railroad ; Massachusetts Coastal Railroad MCCX - Mount Vernon Coal Transfer Company; Mount Vernon Transfer TerminalMCDX - Redland Worth Corporation; Sunbelt CementMCER - Massachusetts Central RailroadMCEU - Massachusetts Central RailroadMCEZ - Massachusetts Central RailroadMCHX - Trinity Rail ManagementMCIX - Mobley Company MCLR - McLaughlin Line RailroadMCLX - Morrison Car LeasingMCMU - Management Control and MaintenanceMCMX - MC Rail ServicesMCPX - Monsanto Company; SolutiaMCR - McCloud River Railroad; McCloud RailwayMCRR - Monongahela Connecting RailroadMCRX - Marcus Rail TransportMCRY - Mid Continent RailwayMCSA - Moscow, Camden and San Augustine RailroadMCSU - China Ocean Shipping CompanyMCTA - Minnesota Central RailroadMCTX - Modern Continental Construction CompanyMCVX - Massachusetts Call Volunteer Firefighters' AssociationMD - Municipal DocksMDAX - Merchants Despatch Transportation CorporationMDCX - Mexicana De Cobre, SA de CVMDDE - Maryland and Delaware RailroadMDDX - Old Line Holding CompanyMDIX - Modern DispersionsMDKX - Gardau MRM Steel MDLR - Midland Terminal CompanyMDP - Mexican Pacific Railroad MDR - Kansas City Southern RailwayMDS - Meridian Southern RailwayMDSB - Burlington Northern RailroadMDSZ - Medspan Shipping ServiceMDT - Merchants Despatch Transportation CorporationMDTX - Merchants Despatch Refrigerator LineMDW - Minnesota, Dakota & Western RailwayMDWU - Minnesota, Dakota & Western RailwayMDWZ - Minnesota, Dakota & Western RailwayME - Morristown & Erie RailwayMEC - Maine Central Railroad; Pan Am RailwaysMECX - Trinity Rail ManagementMEDU - Mediterranean Shipping CompanyMEFX - MexFreshMEFZ - MexFreshMELX - Sunbelt CementMEPX - McGraw-Edison CompanyMERR - Maine Eastern RailroadMERX - MercoMESX - Mears/CPGMET - Modesto and Empire Traction CompanyMETW - Municipality of East Troy WisconsinMETX - Northeast Illinois Regional Commuter Railroad Corporation MF - Middle Fork RailroadMFCX - Farmers Coop Grain and Supply Company; First Union RailMFFX - M4 HoldingsMG - Mobile and Gulf RailroadMGA - Monongahela Railway; Norfolk SouthernMGGU - MarcevaggiMGMX - J and J PartnershipMGRI - MG RailMGRS - Ferrocarriles Nacionales de MexicoMGRX - M&G Resins USA, LLCMGSX - Martin Gas Sales; CF Martin SulphurMH - Mount Hood RailroadMHAX - United States Department of the Interior MHCO - Marquette and Huron Mountain RailroadMHFX - MHF Logistical SolutionsMHLX - General American Transportation CorporationMHM - Norfolk SouthernMHQU - Military Sealift Command MHQZ - Military Sealift CommandMHRX - Mile-High Railcar ServicesMHWA - Mohawk, Adirondack and Northern RailroadMI - Missouri-Illinois Railroad; Missouri Pacific Railroad; Union PacificMICO - Midland Continental RailroadMID - Midway Railroad MIDH - Middletown and Hummelstown RailroadMIDL - Midland RailwayMIDX - MRC Rail ServicesMIEU - MI EngineeringMIGN - Michigan Northern RailwayMILW - Milwaukee Road; Soo Line Railroad; Canadian Pacific RailwayMILX - Milchem; GE Rail Services CorporationMILZ - Soo Line Railroad, Canadian Pacific RailwayMIMX - Minera Mexico InternationalMINE - Minneapolis Eastern RailwayMINU - China Ocean Shipping CompanyMIPX - Millennium PetrochemicalsMIR - Minneapolis Industrial RailwayMIRX - Regional RecyclingMIS - Mississippi Central RailroadMISS - Mississippian RailwayMISU - Malaysian International Shipping CorporationMISX - Milwaukee Solvents and Chemicals CorporationMJ - Manufacturers' Junction RailwayMJRX - M Ryan Railway Service ContractorsMJVU - MercoMKC - McKeesport Connecting RailroadMKCX - Morrison-KnudsenMKFX - Century Rail EnterprisesMKIX - M-K Railroad Equipment Leasing Company; Morrison-KnudsenMKNR - Mackenzie Northern RailwayMKT - Missouri-Kansas-Texas Railroad; Union PacificMKTT - Missouri-Kansas-Texas Railroad; Union PacificMKTZ - Union PacificMLCU - NYK LineMLCX - American Refrigerator Transit CompanyMLD - Midland Railway Co. of ManitobaMLEX - MilesMLHX - American Refrigerator Transit CompanyMLIX - Melbo Land and Investment CompanyMLLX - Montell USA, Basell USAMLMX - Morrison Grain Company; Metal ManagementMLRX - Maddie’s Locomotive Leasing & ResaleMLSX - Monsanto CompanyMLUX - SolutiaMMA - Montreal, Maine & Atlantic RailwayMMAC - Montreal, Maine & Atlantic RailwayMMAX - Martin Marietta Aluminum; Martin Marietta CorporationMMBX - Martin Marietta Corporation; Master BuildersMMCU - CIE Des Messageries MaritimesMMCX - M&M Chemical Products; TransMatrixMMID - Maryland Midland RailwayMMMU - Fesco Pacific LinesMMMX - Minnesota Mining and Manufacturing MMRR - Mid-Michigan RailroadMMRX - Double M Ranch EnterprisesMMSX - Blue CircleMMXZ - Murphy Motor ExpressMNA - Missouri & Northern Arkansas RailroadMNAX - C and S Directional BoringMNBR - Meridian & Bigbee RailroadMNC - Missouri North Central RailroadMNCW - Metro-North Commuter RailroadMNCX - Minnesota Corn ProcessorsMNJ - Middletown and New Jersey RailwayMNLU - Malaysian International Shipping CorporationMNLX - Exxon-Mobil CorporationMNN - Minnesota Northern RailroadMNNR - Minnesota Commercial RailwayMNPX - Morton Norwich Products; Morton InternationalMNRX - Northstar LineMNS - Minneapolis, Northfield and Southern Railway; Soo Line Railroad; Canadian Pacific RailwayMNTX - Minnesota Transportation MuseumMNWX - Minnesota Department of Public Service MOBX - Mobil Oil Corporation; Exxon-Mobil CorporationMOC - Missouri Central RailroadMOCX - Missouri Portland Cement CompanyMOD - Missouri Pacific RailroadMOEX - Morgan EngineeringMOFX - Maxton Oil and Fertilizer CompanyMOGX - C.W. BrooksMOHX - Monsanto Company; SolutiaMOLU - Mitsui OSK LinesMOLX - International Molasses CorporationMON - Monon Railroad; Seaboard System Railroad; CSX TransportationMONX - Monsanto Company; SolutiaMOPZ - Flexi-Van LeasingMORZ - Mitsui OSK LinesMOSX - Mosinee Paper CorporationMOSZ - Mitsui OSK LinesMOT - Marine Oil TransportationMOTC - Montreal TramwaysMOTU - MonsantoMOTX - National Museum of TransportationMOTZ - Mitsui OSK LinesMOWX - Fortaleza Construction CompanyMOXV - Moxahala Valley RailwayMP - Missouri Pacific Railroad; Union PacificMPA - Maryland and Pennsylvania Railroad; York RailwayMPCX - Moyer Packing Company; Michels Pipeline ConstructionMPEX - MotivePowerMPIT - Union PacificMPIX - Myer's Propane Gas Service; MotivePowerMPLI - Minnesota Prairie LineMPLX - GE Rail ServicesMPLZ - Union PacificMPRX - Motive Power & Equipment SolutionsMPSX - Missouri Public ServiceMPTX - ProcorMPU - Missouri Pacific Railroad, Union PacificMPWX - Muscatine Power and WaterMPZ - Union PacificMQCX - Monarch Cement CompanyMQGX - Morrison-Quirk Grain CorporationMQPX - Millennium Inorganic ChemicalsMQRX - Macquarie Rail, Inc.; Wells Fargo RailMQT - Marquette RailMR - McCloud River Railroad; McLeod RailwayMRAX - Mineral RangeMRCX - Evans Railcar Leasing Company; GE Rail Services CorporationMRDX - MidAmerican Energy CompanyMREX - Marshall Railway Equipment Corporation; Monad Railway Equipment CompanyMRHS - Midland RailwayMRI - Mohall RailroadMRIX - Motive Rail IndustriesMRL - Montana Rail LinkMRMX - Midwest Railcar Corporation MRMZ - Monticello Railway MuseumMRR - Carolina Southern RailroadMRRX - GE Rail Services; Murphy Road RecyclingMRS - Manufacturers Railway Company; Anheuser-BuschMRSX - Mile-High Railcar ServicesMS - Michigan Shore RailroadMSAX - Midwest Steel and AlloyMSAZ - National Motor Freight Traffic AssociationMSC - Illinois Central Gulf Railroad MSCI - Mississippi Central Railroad MSCU - Mediterranean Shipping CompanyMSCZ - Mediterranean Shipping CompanyMSDR - Mississippi Delta Railroad, Rock Island RailMSDU - Mediterranean Shipping CompanyMSE - Mississippi Export RailroadMSEX - Princess ToursMSIX - Morton InternationalMSKU - Maersk LineMSL - Montgomery Short LineMSLC - Minnesota Short Lines CompanyMSMU - Mediterranean Shipping CompanyMSMX - Mid South Milling CompanyMSN - Meeker Southern RailroadMSO - Michigan Southern RailroadMSPX - P4 ProductionsMSQU - Military Sealift Command MSR - Mississippi Southern Railroad MSRC - Kansas City Southern Railway MSRW - Mississippian RailwayMSTL - Minneapolis and St. Louis Railway; Chicago & North Western Railway; Union PacificMSTR - Massena Terminal RailroadMSTX - Steam Railroading InstituteMSUU - USPCIMSV - Mississippi and Skuna Valley RailroadMSWY - Minnesota Southern RailwayMT - Mississippi and Tennessee RailNetMTAX - MTAX CorporationMTC - Mystic Terminal CompanyMTCO - Macon Terminal CompanyMTCX - Mallard Transportation CompanyMTCZ - Mayflower Transit and StorageMTDX - Midwest Transportation and Development CompanyMTFR - Minnesota Transfer RailwayMTIU - Welfit OddyMTIZ - American Marine IndustriesMTLU - Montgomery Tank LinesMTLX - Metal Link InternationalMTMU - MarchMTMX - Modern Track MachineryMTNX - Rocky Mountain Transportation ServicesMTPX - Montana Power CompanyMTR - Montour Railroad; Youngstown and Southeastern RailroadMTRX - TransMatrixMTSU - Marine Transport ServiceMTTX - Trailer Train Company; TTX CompanyMTW - Marinette, Tomahawk and Western RailroadMTZ - Mitsui OSK Lines; Montgomery TankMTZX - Mitsui Rail Capital LLCMULX - MUL Railcars Leasing LLCMUSC - Memphis Union Station CompanyMV - Midland Valley RailroadMVCX - Chaparral EnergyMVP - Missouri and Valley Park RailroadMVRY - Mahoning Valley RailwayMVT - Mount Vernon TerminalMWAX - Martin Marietta MaterialsMWBX - Midwest By-Products CompanyMWCL - Midwest Coal HandlingMWCX - Midwest Railcar CorporationMWHX - Markwest Hydrocarbon PartnersMWLX - Midwest Locomotive Leasing and SalesMWLZ - Madrigal-Wan Hai Lines CorporationMWMX - Midwest Mud Company; Golden LeasingMWPX - Murco Wall ProductsMWR - Muncie and Western RailroadMWRC - Mount Washington RailwayMWRL - Molalla Western Railway; Hillvista Investment CompanyMWRR - Montana Western RailwayMWRX - Midwest RailMWSX - Midwest Solvents Company; GE Rail ServicesMWTT - Michigan-Wisconsin Transportation CompanyMXLU - Mexican LineMZIZ - Marko B Zanovich