Home Postcodes by state QLD 4304 Postcode 4304 4304 is the postcode for 7 localities in QLD: Blackstone, Booval, Booval Fair, Bundamba, Ebbw Vale, North Booval and 1 more. Localities with postcode 4304BlackstoneQLDBoovalQLDBooval FairQLDBundambaQLDEbbw ValeQLDNorth BoovalQLDSilkstoneQLD Postcode 4304 State or territory Queensland (QLD) Localities 7 Council area Ipswich Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4303 · Postcode 4305