Marc not an expert on long distance calling but I believe 011 is the code for the USA and what is put in front of the local number when calling from overseas. The phone will not be free and probably quite expensive. Trying to call a ship directly would be difficult and not even sure if that number would be availabl to a guest. If it was an emergency they should call us and we will contact Silversea who could get a message to the ship OR call Silversea directly.
