Average GPS coordinates for Sơn An Postcode location: 18.553, 105.491. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Sơn An on map:

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Listing cities & postcodes (1):
>> Hà Tĩnh, 480000 Sơn An, Bắc Trung Bộ, GPS coordinates: 18.55334,105.49088