Home Postcodes by state WA 6770 Postcode 6770 6770 is the postcode for 7 localities in WA: Halls Creek, Mcbeath, Mueller Ranges, Ord River, Purnululu, Sturt Creek and 1 more. Localities with postcode 6770Halls CreekWAMcbeathWAMueller RangesWAOrd RiverWAPurnululuWASturt CreekWATanamiWA Postcode 6770 State or territory Western Australia (WA) Localities 7 Council area Halls Creek Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 6765 · Postcode 6798