Home Postcodes by state VIC 3506 Postcode 3506 3506 is the postcode for Cowangie, VIC. Localities with postcode 3506CowangieVIC Postcode 3506 State or territory Victoria (VIC) Localities 1 Council area Mildura Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3505 · Postcode 3507