Netherlands and Belgium postcode finder
Postal codes in the Netherlands, known as postcodes, are alphanumeric, consisting of four digits followed by two uppercase letters. The letters 'F', 'I', 'O', 'Q', 'U' and 'Y' were originally not used for technical reasons, but almost all existing combinations are now used as these letters were allowed for new locations starting 2005.
The first two digits indicate a city and a region, the second two digits and the two letters indicate a range of house numbers, usually on the same street. Consequently, a postal address is uniquely defined by the postal code and the house number. On average, a Dutch postal code comprises eight single addresses.