 NY 17 was rerouted in the 1930 renumbering to follow a previously unnumbered direct route between Andover and Jasper while the old routing between Andover and Hornell became NY 17F.NY 17F also continued south along NY 21 (which replaced NY 17 from Hornell to Jasper) to Canisteo, then east over an unnumbered roadway to NY 17 in Addison (via Cameron and Rathbone).NY 17F remained unchanged until the early 1940s when the route was removed from the state highway system.