Home Postcode finder WA Seabird Seabird postcode WA Seabird is a locality in Western Australia covered by postcode 6042. Postcode 6042 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Seabird business listing Be the first listing in Seabird Common questionsWhat is the postcode for Seabird?Seabird, WA has the postcode 6042.What state is Seabird in?Seabird is in Western Australia (WA).Does postcode 6042 cover more than one suburb?No. Postcode 6042 covers Seabird only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.