Home Postcodes by state VIC 3583 Postcode 3583 3583 is the postcode for Tresco, VIC. Localities with postcode 3583TrescoVIC Postcode 3583 State or territory Victoria (VIC) Localities 1 Council area Swan Hill Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3581 · Postcode 3584