sidn.nl

SIDN manages the .nl country-code top-level domain and develops and delivers domain name and cybersecurity products and services. Its work includes applied technical research aimed at improving the security of internet infrastructure for the Netherlands, Europe and beyond. Products listed on the website include SIDN Merkbewaking, which helps organisations detect look-alike domain registrations used for phishing, and a .nl domain name suggestion tool.

Its customers include .nl registrars and organisations seeking to protect their brand names. SIDN also provides technical and legal support to the .politie, .aw and .amsterdam top-level domains, and its SIDN fund has supported more than 400 internet projects.

SIDN manages more than 6,000,000 .nl domain names and processes more than 8 billion .nl queries daily. It removes over 8,000 abused domain names from the internet each year. SIDN Labs publishes research on .nl traffic, and in October 2026 the supervisory board appointed Anne Fleur van Veenstra as co-CEO, starting 1 January 2027.

Product: Registry services for the .nl domain, domain name suggestion tool, and SIDN Merkbewaking brand monitoring against look-alike domain registrations.