Editing Postal code (section)

=== Postal zone numbers ===
Before postal codes as described here were used, large cities were often divided into postal zones or postal districts, usually numbered from 1 upwards within each city. The newer postal code systems often incorporate the old zone numbers, as with [[London postal district]] numbers, for example. Ireland still uses [[List of Dublin postal districts|postal district numbers]] in [[Dublin]]. In New Zealand, [[Auckland]], [[Wellington]] and [[Christchurch]] were divided into postal zones, but these fell into disuse, and have now become redundant as a result of a new postcode system being introduced.