Home Postcodes by state QLD 4212 Postcode 4212 4212 is the postcode for 4 localities in QLD: Helensvale, Hope Island, Sanctuary Cove and Helensvale Town Centre. Localities with postcode 4212HelensvaleQLDHelensvale Town CentreQLDHope IslandQLDSanctuary CoveQLD Postcode 4212 State or territory Queensland (QLD) Localities 4 Council area Gold Coast Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4211 · Postcode 4213