Postcodes in Australia
Major towns and cities tend to have "0" as the last numeral or last two numerals, e.g. Rockhampton, Queensland has the postcode 4700 and Ballarat, Victoria has the postcode 3350. There are exceptions; the major town of Ipswich, Queensland has the postcode 4305, while Goodna, a suburb of Ipswich, is allocated 4300.