Average GPS coordinates for Castarnes Postcode location: 42.428, 0.683. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Castarnes on map:

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Listing cities & postcodes (1):
>> Aragon, 22486 Castarnes, Huesca, GPS coordinates: 42.4278,0.683