Postcodes are allocated to geographic areas to help us process and deliver mail to our customers. The current 4-digit numeric postcode system was introduced in 1967 with the first mechanised mail processing centre in Australia.
The relevant State and Local Government Authorities in each state are responsible for locality naming and determining boundary extent.
Contact your local council or shire if you have any concerns about your assigned locality.
Our decision as to whether a new or an existing postcode is to be allocated to a locality is based on operational efficiency. Factors including the configuration of our network, transportation connections and delivery arrangements are all taken into consideration when making our decision.
Australia Post may introduce, retire or change postcodes at any time at its absolute discretion to support operational requirements and provide enhanced service to our customers.
Changes to postcodes may involve consultation with the local council/shire and residents, depending upon the scale and significant impact of the change.
Postcode changes are implemented from a specified date but we ensure that either postcode can be recognised for a limited period without redu