Average GPS coordinates for Hải An Postcode location: 19.542, 105.793. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Hải An on map:

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Listing cities & postcodes (1):
>> Thanh Hóa, 440000 Hải An, Bắc Trung Bộ, GPS coordinates: 19.54179,105.79289