Average GPS coordinates for Halton Postcode location: -32.266, 151.476. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Halton on map:

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Listing cities & postcodes (1):
>> New South Wales, 2311 Halton, HUNTER, GPS coordinates: -32.2662,151.4762