Average GPS coordinates for Hải Nam Postcode location: 20.226, 106.341. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Hải Nam on map:

---

Listing cities & postcodes (1):
>> Nam Định, 420000 Hải Nam, Đồng Bằng Sông Hồng, GPS coordinates: 20.22627,106.34095