Home Postcodes by state VIC 3420 Postcode 3420 3420 is the postcode for 3 localities in VIC: Lillimur, Serviceton and Telopea Downs. Localities with postcode 3420LillimurVICServicetonVICTelopea DownsVIC Postcode 3420 State or territory Victoria (VIC) Localities 3 Council area West Wimmera Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3419 · Postcode 3423