Home Postcodes by state WA 6326 Postcode 6326 6326 is the postcode for Narrikup, WA. Localities with postcode 6326NarrikupWA Postcode 6326 State or territory Western Australia (WA) Localities 1 Council area Plantagenet Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6324 · Postcode 6327