|Founded:||April 25, 1996|
|Headquarters:||Utrechtseweg 310 6812 AR Arnhem|
| Roelof Meijer, CEO|
Erwin Heringa, System Engineer
Stichting Internet Domeinregistratie Nederland - SIDN is the national manager of the Dutch ccTLD and provides registry services in Netherlands for .nl domains. It is ICANN accredited and is responsible for issuing all Dutch domain names. It has around 1,900 registrars and ISPs operating under it. The .nl domain is considered the world's fourth largest and safest ccTLD, and has over 4 million domain names. There is one .nl domain for ever 5 people in the Netherlands, the highest such ratio of any ccTLD worldwide. However, SIDN has had some issues regarding the implementation of IPv6. ICANN signed the Accountability Framework for the .nl TLD with SIDN in 2007.
In English, SIDN means Netherlands Domain Registration Foundation.