Average GPS coordinates for Upper Allyn Postcode location: -32.353, 151.516. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Upper Allyn on map:

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Listing cities & postcodes (1):
>> New South Wales, 2311 Upper Allyn, GPS coordinates: -32.3529,151.5156