Average GPS coordinates for Chiswick Postcode location: -33.85, 151.139. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Chiswick on map:

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Listing cities & postcodes (1):
>> New South Wales, 2046 Chiswick, LEICHHARDT, GPS coordinates: -33.85,151.1385