Average GPS coordinates for Hollydeen Postcode location: -32.566, 150.518. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Hollydeen on map:

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Listing cities & postcodes (1):
>> New South Wales, 2328 Hollydeen, HUNTER, GPS coordinates: -32.5658,150.5176