Postcodebijadres.nl makes Dutch postcode and address information accessible to everyone through an online search service. Visitors can look up the correct postcode or street using an address, or search by postcode, street, or address. The site covers the Netherlands, with listings for postcodes, streets, and addresses across the country, from Amsterdam to Zwolle. It also provides overviews of Dutch postcodes, municipalities, telephone area codes, provinces, and popular places, alongside frequently asked questions and contact information.

The website describes its data as reliable because it comes directly from the Kadaster’s BAG (Basic Registration of Addresses and Buildings). Information is updated periodically to help users access current records. Postcodebijadres.nl presents its service as having complete nationwide coverage and also advertises a business postcode service. Its straightforward search and location directories are intended to help individuals and businesses identify address details efficiently. The site additionally links to related postcode resources, including information about postcodes in Belgium and the United Kingdom, and PostNL, offering visitors useful routes to further address-related information.