Average GPS coordinates for Hawker Postcode location: -31.889, 138.42. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Hawker on map:

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Listing cities & postcodes (1):
>> South Australia, 5434 Hawker, SA FAR, GPS coordinates: -31.8892,138.42