Average GPS coordinates for Blacktown Postcode location: -33.767, 150.917. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Blacktown on map:

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Listing cities & postcodes (1):
>> New South Wales, 2148 Blacktown, RICHMOND, GPS coordinates: -33.7667,150.9167