Home Postcodes by state VIC 3806 Postcode 3806 3806 is the postcode for 2 localities in VIC: Berwick and Harkaway. Localities with postcode 3806BerwickVICHarkawayVIC Postcode 3806 State or territory Victoria (VIC) Localities 2 Council area Casey Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3805 · Postcode 3807