Home Postcodes by state WA 6485 Postcode 6485 6485 is the postcode for 5 localities in WA: Cowcowing, Korrelocking, Nalkain, Nembudding and Wyalkatchem. Localities with postcode 6485CowcowingWAKorrelockingWANalkainWANembuddingWAWyalkatchemWA Postcode 6485 State or territory Western Australia (WA) Localities 5 Council area Wyalkatchem Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6484 · Postcode 6487