Home Postcodes by state WA 6253 Postcode 6253 6253 is the postcode for 3 localities in WA: Balingup, Grimwade and Southampton. Localities with postcode 6253BalingupWAGrimwadeWASouthamptonWA Postcode 6253 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 6252 · Postcode 6254