Home Postcode finder WA East Nannup East Nannup postcode WA East Nannup is a locality in Western Australia covered by postcode 6275. Postcode 6275 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free East Nannup business listing Be the first listing in East Nannup Common questionsWhat is the postcode for East Nannup?East Nannup, WA has the postcode 6275.What state is East Nannup in?East Nannup is in Western Australia (WA).Does postcode 6275 cover more than one suburb?Yes. Postcode 6275 covers 10 localities, so the postcode alone does not identify East Nannup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.