Home Postcodes by state QLD 4103 Postcode 4103 4103 is the postcode for 3 localities in QLD: Annerley, Fairfield and Fairfield Gardens. Localities with postcode 4103AnnerleyQLDFairfieldQLDFairfield GardensQLD Postcode 4103 State or territory Queensland (QLD) Localities 3 Council area Brisbane Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4102 · Postcode 4104