NY 128 soon enters the town of New Castle, where it changes names to Armonk Road on its way north, remaining a two-lane residential street. The route winds its way north via several bends, soon becoming a wooded roadway through New Castle.
NY 128 quickly arrives at the town of New Castle, where it is renamed Armonk Road as it heads north. The route meanders through the area, taking several turns before transforming into a wooded road within New Castle.