Home Postcode finder WA Mokup Mokup postcode WA Mokup is a locality in Western Australia covered by postcode 6394. Postcode 6394 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Mokup business listing Be the first listing in Mokup Common questionsWhat is the postcode for Mokup?Mokup, WA has the postcode 6394.What state is Mokup in?Mokup is in Western Australia (WA).Does postcode 6394 cover more than one suburb?Yes. Postcode 6394 covers 8 localities, so the postcode alone does not identify Mokup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.