Average GPS coordinates for Sien Postcode location: 49.7, 7.5. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Sien on map:

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Listing cities & postcodes (1):
>> Rheinland-Pfalz, 55758 Sien, Birkenfeld, GPS coordinates: 49.7,7.5