Home Postcodes by state WA 6251 Postcode 6251 6251 is the postcode for 3 localities in WA: Brazier, Kirup and Newlands. Localities with postcode 6251BrazierWAKirupWANewlandsWA Postcode 6251 State or territory Western Australia (WA) Localities 3 Council area Donnybrook-Balingup Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6244 · Postcode 6252