- Kansas City Southern Railroad
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
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- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
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- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
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- Kansas City Southern Railway
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- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Southern Railway
- Kansas City Terminal Railway
- Kansas Eastern Railroad
- Kansas Oklahoma Railway
- Kansas Southern Lines
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- Kaw River Railroad
- Kcs Railroad
- KCS Railway Co
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- KCS Railway Co
- KCS Railway Depot
- KCS Ry Co
- Kcs Transportation
- Kcs Transportation
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- Kendallville Terminal Railroad
- Keokuk Junction Railway Co
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- Kiamichi Railroad
- Kiamichi Railroad
- Kiamichi Railroad
- Kiamichi Railroad
- Kingsport Railcar
- Knoxville & Holston River
- KWT Railway Inc
- Kyle Railroad Co
- Kyle Railroad Co
- Kyle Railroad Co
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- Kyle Railroad Co
- Kyle Railroad Co
- Kyle Railroad Co
- L & Nw RAILROAD Co
- L A Junction Railway
- L G Everist Inc
- Lahaina Kaanapali & Pacific Rr
- Lake Central Railroad
- Lake COUNTY Railroad
- Lake State Railway Co
- Lake Superior & Ishmpg Railrd
- Lake Superior & Ishmpg Railrd
- Lake Superior & Ishmpg Railrd
- Lake Superior & Ishmpg Railrd
- Lake Superior & Ishmpg Railrd
- Lake Superior & Ishmpg Railrd
- Lake Superior & Ishpeming Rr
- Lake Superior & Ishpeming Rr
- Lake Superior & Ishpeming Rr
- Lake Superior & Ishpeming Rr
- Lake Superior & Ishpmg Railrd
- Lake Superior & Ishpmg Railrd
- Lake Terminal Railroad Co
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- Lancaster & Chester Railroad
- Lapeer Industrial Railroad Co
- Largo Central Railroad
- Laurinburg & Southern Railroad
- Leadville Colorado & Southern
- Livonia Avon & Lakeville Rr
- Livonia Avon & Lakeville Rr
- Livonia Avon Lakeview Rr Corp
- LNW Railroad Co
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- Locomotive Shop
- Logistic Services Of America
- Lomita Rail Terminal
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- Long Island Railroad
- Long Island Railroad
- Long Island Railroad
- Long Island Railroad
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- Long Island Railroad
- Los Angeles County Mta
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- Louisville & Indiana Railroad
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- Louisville New Albany Corydon
- M & B Railroad LLC
- M & B Railroad LLC
- M & B Railroad Shop
- M & B River Bridge Office
- M D & W Railway
- M K & T Rr
- Madison Railroad
- Mahoning Valley Railway Co
- Maine Central Railroad
- Maine Central Railroad
- Maine Central Railroad
- Maine Central Railroad
- Maine Central Railroad
- Maine Central RR
- Maine Central Rr Co
- Maine Eastern Railroad
- Maine Eastern Railroad Co
- Maine Eastern Railroad Maine
- Maintenance Of Way & Strctrs
- Maintenance Of Way Dept
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- Mansfield Railroad Station
- Marc Commuter
- Markit Services
- Marta Track
- Maryland Delaware Railroad Co
- Maryland Midland Railway
- Maryland Midland Railway Co
- Maryland Midland Railway Co
- Masas
- Masas
- Massachusetts Bay Railroad
- Massachusetts Bay Trnsprtn
- Massena Termnl RR Co Genl Ofc
- Master Mechanic & Storekeeper
- Maumee & Western Railroad
- MBTA
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- Mechanical Inspection
- Meridian Southern Railway
- Meridian Southern Railway LLC
- Metra
- Metra
- Metra
- Metra
- Metra
- Metra
- Metra
- Metra
- Metra
- Metra
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- Metro North
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- Metrolink
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- Michigan Au Sable Valley Rlrd
- Mid America Rail & Storage
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- Mid-Michigan Railroad
- Mid-Michigan Railroad Inc
- Middletown & Nj RY Co
- Midland Historic Railroad Dpt
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- Midland Valley Railroad
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- Milwaukee Roadmaster
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- Minneapolis-Northfield
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- Mississippi & Tennessee
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- Missouri & Northern Ar
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- Missouri & Northern Arkansas
- Missouri & Northern Arkansas
- Missouri & Northern Railroad
- Missouri & Northern Rr
- Missouri & Pacific Railroad
- Missouri & Pacific Railroad Co
- Missouri & Valley Pk Railroad
- Missouri Kansas Texas Railroad
- Missouri Kansas Texas Railroad
- Missouri Kansas Texas Railroad
- Missouri Kansas Texas Rr Co
- Missouri Northern Ar Railroad
- Missouri Pacific
- Missouri Pacific
- Missouri Pacific Co
- Missouri Pacific Lines
- Missouri Pacific Railroad
- Missouri Pacific Railroad Co
- Missouri Pacific Railroad Co
- Missouri Pacific Rr Co
- Missouri-Kansas-Texas Railroad
- Missouri-Kansas-Texas Railroad
- MKT Railroad
- MKT Railroad
- Mo KANS Tex Rr
- Mo Pac Railroad
- Mo Pac Rr
- Mo Pac Rr
- Mo Pacific Railroad
- Mo Pacific Railroad Co
- MO/Ar Northern Railroad
- Modesto & Empire Traction Co
- Modoc Northern Railroad
- Modoc Northern Railroad Co
- Mohawk Adirondack & Northern
- Mohawk Adirondack & Northern
- Mohawk Adirondack & Northern
- Monongahela Railway Co
- Monongahela Railway Co
- Montana Rail Link
- Montana Rail Link
- Montana Rail Link
- Montana Rail Link
- Montana Rail Link
- Montana Rail Link
- Montana Rail Link
- Montana Rail Link
- Montana Rail Link
- Montana Rail Link Inc
- Montana Rail Link Inc
- Montana Rail Link Inc
- Montana Rail Link Maintance
- Montana Rail Link Mechanical
- Montana Rail Link Trainmaster
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- Monterey & Salinas Vly Rlrd
- Montreal Maine & Atlantic Rlrd
- Montreal Maine & Atlantic Rr
- Montreal Maine & Atlantic Rr
- Montreal Maine Atlantic
- Montreal Maine Atlantic Rwy
- Montvale Railroad Station
- Morehead & Southfork Co Inc
- Morristown & Erie Railway Inc
- Moterm
- Moterm
- Motive Power Inc
- Motive Rail Inc
- MRC Rail Svc
- Mt Hood Railroad
- Mt Rainier Scenic Railroad
- MTA Long Island Rail Road Co
- MTA Long Island Rail Road Co
- Muskie Transloading Facility
- N & M Rail Products
- N & W Maintenance Of Way
- N & W Maintenance Of Way
- N & W Maintenance Of Way
- N & W Railroad
- N & W Railroad
- N & W Railway Co
- N & W Railway Co
- N & W Ry Co
- N H Northcoast Corp
- N J Transit Rail
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- N S Railroad
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- Napa Valley Railroad Co
- Nash County Railroad
- Nashville & Eastern Railroad
- National Piggyback Inc
- National Railroad Passenger
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- National Railroad Retirement
- National Railway Equip Co
- National Railway Historical
- National Railway Historical
