Home Postcodes by state VIC 3057 Postcode 3057 3057 is the postcode for 3 localities in VIC: Brunswick East, Lygon Street North and Sumner. Localities with postcode 3057Brunswick EastVICLygon Street NorthVICSumnerVIC Postcode 3057 State or territory Victoria (VIC) Localities 3 Council area Merri-bek Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3056 · Postcode 3058