Home Postcode finder WA Dalyup Dalyup postcode WA Dalyup is a locality in Western Australia covered by postcode 6450. Postcode 6450 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Dalyup business listing Be the first listing in Dalyup Common questionsWhat is the postcode for Dalyup?Dalyup, WA has the postcode 6450.What state is Dalyup in?Dalyup is in Western Australia (WA).Does postcode 6450 cover more than one suburb?Yes. Postcode 6450 covers 23 localities, so the postcode alone does not identify Dalyup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.