Home Postcodes by state VIC 3770 Postcode 3770 3770 is the postcode for 3 localities in VIC: Coldstream, Gruyere and Yering. Localities with postcode 3770ColdstreamVICGruyereVICYeringVIC Postcode 3770 State or territory Victoria (VIC) Localities 3 Council area Yarra Ranges Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 3767 · Postcode 3775