Average GPS coordinates for La Union Postcode location: -5.541, -76.23. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). La Union on map:

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Listing cities & postcodes (2):
>> Loreto, 16520 La Union, Alto Amazonas, GPS coordinates: -5.28333, -76.28333
>> Loreto, 16500 La Union, Alto Amazonas, GPS coordinates: -5.79799, -76.17699