From its east end, NS has trackage rights south on the New Jersey Transit Main and Bergen County Lines to Conrail's North Jersey Shared Assets Area.

From Port Jervis to Binghamton, the line is leased to and maintained by the Central New York Railroad, part of the Delaware Otsego Corporation.

[1] Extensions opened to Port Jervis and Binghamton in 1848,[2] Owego in 1849,[3] and Dunkirk (leaving the Southern Tier Line at Hornell) in 1851.

Norfolk Southern leased the section between Suffern and Port Jervis to the Metro-North Railroad on March 31, 2003.

[7] It leased the section between Port Jervis and Binghamton to the Central New York Railroad on December 31, 2004.