I used to live with a family in Berlin, Germany. More specifically in Heiligensee in the Reinickendorf area. I need to contact the family, but my address book recently burned in a fire at my storage unit complex. Thank you for your time and consideration of this matter and I look forward to your replies with great appreciation.
You can also contact the Berlin city administration and ask for a "Melderegisterauskunft", if they do not have a telephone.