Home Postcodes by state WA 6106 Postcode 6106 6106 is the postcode for Welshpool, WA. Localities with postcode 6106WelshpoolWA Postcode 6106 State or territory Western Australia (WA) Localities 1 Council area Canning Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6105 · Postcode 6107