Home Postcodes by state VIC 3181 Postcode 3181 3181 is the postcode for 3 localities in VIC: Prahran, Prahran East and Windsor. Localities with postcode 3181PrahranVICPrahran EastVICWindsorVIC Postcode 3181 State or territory Victoria (VIC) Localities 3 Council area Stonnington Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3180 · Postcode 3182