Average GPS coordinates for Undercliffe Postcode location: -31.329, 151.468. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Undercliffe on map:

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Listing cities & postcodes (2):
>> New South Wales, 2206 Undercliffe, ST GEORGE, GPS coordinates: -33.9331,151.1111
>> New South Wales, 4380 Undercliffe, GPS coordinates: -28.7241,151.825