The United States Postal Service delivers mail to each floor.
The local post office is Lenox Hill North, located at 909 Third Avenue, Suite 400 between 54th and 55th Streets. Their phone number is (212) 330-5561.
To establish new service, send a letter on your company letterhead requesting service to:
Lenox Hill North
909 Third Avenue Suite 400
New York, NY 10022
Be sure to include the address (599 Lexington, New York, NY 10022) and your floor(s).