Home Postcodes by state VIC 3903 Postcode 3903 3903 is the postcode for Swan Reach, VIC. Localities with postcode 3903Swan ReachVIC Postcode 3903 State or territory Victoria (VIC) Localities 1 Council area East Gippsland Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3902 · Postcode 3904