north-walpole postcode wa Home ›› Postcode Finder ›› WA ›› North-Walpole North Walpole local listingsThe suburb of North Walpole is located in WA and has a postcode of 6398. Free north walpole business listing! Get the first free listing in north walpole! Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.