Average GPS coordinates for Welby Postcode location: -34.439, 150.431. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Welby on map:

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Listing cities & postcodes (1):
>> New South Wales, 2575 Welby, CAMPBELLTOWN, GPS coordinates: -34.4393,150.4306