Postcodes were introduced in Australia in 1967 by the Postmaster-General's Department (PMG) to replace earlier postal sorting systems, such as Melbourne's letter … See more

Australian postcodes are sorting information. They are often linked with one area (e.g. 6160 belongs only to Fremantle, Western Australia). Due to postcode rationalisation, they can be quite complex, especially in country areas (e.g. 2570 belongs to twenty … See more

Australian states and territories
The first one or two numerals usually show the state or territory that the postcode belongs to See more

Many other organisations now use postcodes. Insurance companies often use postcodes when working out the cost of car and house … See more

Australian postcodes consist of four digits, and are written after the name of the city, suburb, or town, and the state or territory:
Recipient Name … See more

Some places in Australia do not have postcodes. These are typically remote areas with little or no population. See more

Australia Post prefers envelopes sold in Australia to have four boxes in the bottom right corner of the front of the envelope. Entering the postcode in these boxes or squares, which Australia Post calls postcode squares, enables Australia Post to use See more