• Chicago, Missouri and Western Railway 1987-1989
  • Illinois Central Gulf Railroad 1972-1987
    • Gulf, Mobile and Ohio Railroad 1947-1972
      • Alton Railroad 1931-1947 Subsidiary of Baltimore and Ohio Railroad
        • Chicago and Alton Railroad 1906-1931 took over line from Peoria-Springfield
          • Chicago and Alton Railway 1900-1906 controlled by UP & Rock; later NKP
            • Chicago and Alton Railroad 1861-1900
              • Kansas City, St. Louis and Chicago Railroad 1878-1950 leased by Alton RR Mexico-Kansas City
              • Louisiana and Missouri River Railroad 1870-1950 leased by Alton RR Louisiana-Springfield, Missouri
              • Joliet and Chicago Railroad 1864-1950 leased by Alton RR Joliet – Chicago
              • St. Louis, Alton and Chicago Railroad c.1857-1861 Alton – Joliet
                • Alton and Sangamon Railroad 1847-c.1857 Springfield – Alton

Wikipedia