Home Postcodes by state QLD 4225 Postcode 4225 4225 is the postcode for 2 localities in QLD: Bilinga and Coolangatta. Localities with postcode 4225BilingaQLDCoolangattaQLD Postcode 4225 State or territory Queensland (QLD) Localities 2 Council area Gold Coast Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4224 · Postcode 4226