“In 1978 zip or postcodes were introduced in the Netherlands; they consist of four numbers followed by a space and then to capital letters and are replaced before the name of the town... they referred to the city block in a given street in which the house occurs and thus the Dutch postal code book is the size of a telephone book.” ConfusingDutchNetherlandsFun Fact Book:Dutch: A Comprehensive Grammar Source: Dutch: A Comprehensive Grammar