phone number of Fleetenkieker in BC??

I'm seeking the telephone number of a small hotel in Boca Chica. It is called "Fleetenkieker" and is located directly above the autopista and below the better known "Casitas del Sol". The owner is a German (Holger) who changed the number recently. It used to be 523-6351 which now belongs to Casitas del Sol! I was not able to talk the receptionist there in crossing the street and asking for the new number! People in Boca Chica who might know it are Hans, the owner of the bar Austria, and Garrit, a Dutch from the Creperia Francaise. Can you help me? Thanks alot guys!