Tell us what you love about staying at a Helmsley Hotel, or if there's something we can do to make your stay even better. The Helmsley Carlton House 680 Madison Avenue New York, New York 10021 Tel: 212-838-3000 Reservations: 212-697-8300 Fax: 212-753-8575 Toll-free Reservations: 1-800-221-4982 Email: frontdesk@helmsleyhotels.com or carltonhousefrontdesk@helmsleyhotels.com