Home Postcodes by state QLD 4124 Postcode 4124 4124 is the postcode for 5 localities in QLD: Boronia Heights, Greenbank, Lyons, New Beith and Spring Mountain. Postcode 4124 State or territory Queensland (QLD) Localities 5 Council area Logan Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Localities with postcode 4124Boronia HeightsQLDGreenbankQLDLyonsQLDNew BeithQLDSpring MountainQLD Browse postcodes in order← 4123 Rochedale · 4125 Munruben →