Home Postcodes by state QLD 4311 Postcode 4311 4311 is the postcode for 17 localities in QLD: Atkinsons Dam, Brightview, Buaraba, Buaraba South, Churchable, Clarendon and 11 more. Localities with postcode 4311Atkinsons DamQLDBrightviewQLDBuarabaQLDBuaraba SouthQLDChurchableQLDClarendonQLDCoolanaQLDCoominyaQLDLockyer WatersQLDLowoodQLDMindenQLDMount TarampaQLDPatrick EstateQLDPrenzlauQLDRifle RangeQLDTarampaQLDWivenhoe HillQLD Postcode 4311 State or territory Queensland (QLD) Localities 17 Council area Somerset; Mainly Lockyer Valley, partly Somerset; Lockyer Valley Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4310 · Postcode 4312