Average GPS coordinates for Guildford Postcode location: -31.9, 115.967. (Notice: some coordinates are "GEO located" from street addresses. These numbers may be inaccurate. With this map you can check the coordinates.). Guildford on map:

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Listing cities & postcodes (2):
>> Western Australia, 6055 Guildford, STIRLING, GPS coordinates: -31.9,115.9667
>> Western Australia, 6935 Guildford, STIRLING, GPS coordinates: -31.9,115.9667