Home Postcodes by state VIC 3778 Postcode 3778 3778 is the postcode for 2 localities in VIC: Fernshaw and Narbethong. Localities with postcode 3778FernshawVICNarbethongVIC Postcode 3778 State or territory Victoria (VIC) Localities 2 Council area Yarra Ranges; Murrindindi Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3777 · Postcode 3779