All of NY 173 west of Genesee Street in Camillus is maintained by Onondaga County. NY 173 is co-designated with CR 204 from NY 31 to Bennetts Corners Road in Van Buren, CR 64 between Bennetts Corners Road and Canton Street in the hamlet of Warners, CR 57 from Canton Street to Thompson Road in Camillus, and CR 63 between Thompson Road and Genesee Street. Within Syracuse, NY 173 is maintained by the city. The remainder of the route in both Onondaga and Madison counties is maintained by the New York State Department of Transportation.