Home Postcodes by state VIC 3311 Postcode 3311 3311 is the postcode for 2 localities in VIC: Casterton and Corndale. Localities with postcode 3311CastertonVICCorndaleVIC Postcode 3311 State or territory Victoria (VIC) Localities 2 Council area Glenelg Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3310 · Postcode 3312