Home Postcodes by state QLD 4111 Postcode 4111 4111 is the postcode for Nathan, QLD. Localities with postcode 4111NathanQLD Postcode 4111 State or territory Queensland (QLD) Localities 1 Council area Brisbane Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4110 · Postcode 4112