Hi Julie,
Area codes and city codes are the same thing (city code=area code for a particular city).
I think your confusion comes from the city name. I looked up Schoenbrunn which seems to actually be Schönbrunn. I found at least two cities with this name in Germany: Schönbrunn b Hildburghausen (area code 36874) and just Schönbrunn (area code 6272). In any case, you shouldn’t have more than 10 digits for the phone number (including area code) and you have 12. My hunch is that you have been trying to call the Schönbrunn that has area code 6272 and mistakenly added area code 36874 of Schönbrunn b Hildburghausen to a complete number resulting in a too long inexistant German phone number. Moreover, the zero in the beginning of the Schönbrunn number (0627 etc) should be removed because it is just a code used for calls within Germany only. So I believe you should dial 011 49 627 and whatever digits you have. Again, the number you have seems complete so try to dial without adding any area codes and just removing the zero.
Let me know if this works and if not we’ll look for other solutions.
Dan