Home Postcodes by state QLD 4340 Postcode 4340 4340 is the postcode for 18 localities in QLD: Ashwell, Calvert, Ebenezer, Grandchester, Jeebropilly, Lanefield and 12 more. Localities with postcode 4340AshwellQLDCalvertQLDEbenezerQLDGrandchesterQLDJeebropillyQLDLanefieldQLDLower Mount WalkerQLDMerryvaleQLDMoorangQLDMount ForbesQLDMount MortQLDMount WalkerQLDMount Walker WestQLDRosevaleQLDRosewoodQLDTallegallaQLDThe BluffQLDWoolshedQLD Postcode 4340 State or territory Queensland (QLD) Localities 18 Council area Ipswich; Mainly Ipswich, partly Scenic Rim; Scenic Rim Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4313 · Postcode 4341