Home Postcodes by state VIC 3683 Postcode 3683 3683 is the postcode for 3 localities in VIC: Chiltern, Chiltern Valley and Cornishtown. Localities with postcode 3683ChilternVICChiltern ValleyVICCornishtownVIC Postcode 3683 State or territory Victoria (VIC) Localities 3 Council area Indigo Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3682 · Postcode 3685