wyalkatchem postcode wa Home ›› Postcode Finder ›› WA ›› Wyalkatchem Wyalkatchem local listingsThe suburb of Wyalkatchem is located in WA and has a postcode of 6485. Free wyalkatchem business listing! 1Wyalkatchem District High SchoolHonour Ave 08 96811010 View more business listings in wyalkatchem Search and find other Postcodes in Western Australia or widen the search to Postcodes in Australia.