Home Postcode finder WA Nullagine Nullagine postcode WA Nullagine is a locality in Western Australia covered by postcode 6758. Postcode 6758 State or territory Western Australia (WA) Region North West Suburbs Add a free Nullagine business listing Be the first listing in Nullagine Common questionsWhat is the postcode for Nullagine?Nullagine, WA has the postcode 6758.What state is Nullagine in?Nullagine is in Western Australia (WA).Does postcode 6758 cover more than one suburb?No. Postcode 6758 covers Nullagine only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.