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Frequently asked questions

  • I am looking for a domain name registrant. Where can I look it up?

    The Whois is an easy-to-use tool for checking the availability of a .nl domain name. If the domain name is already taken, you can see who has registered it.

    On the page looking up a domain name you will find more information about what a domain name is, how the Whois works and how the privacy of personal data is protected. Alternatively, you can go straight to look for a domain name via the Whois.

  • I would like to transfer my domain name to another registrar. What is the procedure?

    To get your domain name transferred, you need the token (unique ID number) for your domain name. Your existing registrar has the token and is obliged to give it to you within five days, if you ask for it. The procedure for changing your registrar is described on the page transferring your domain name.

  • The details registered about me/my company are incorrect or out of date. How can I get them updated?

    To update the contact details associated with your domain name, you need to contact your registrar. Read more about updating contact details.

  • Why is my domain name in quarantine?

    When a domain name is cancelled, we aren't told the reason, so we can't tell you. You'll need to ask your registrar. The advantage of quarantine is that, if a name's cancelled by mistake, you can always get it back.

    One common reason is that the contract between you and your registrar says you've got to renew the registration every year. If you haven't set up automatic renewal and you don't renew manually, the registration will expire.

  • Ik heb een klacht over mijn provider/registrar. Kan ik daarvoor bij SIDN terecht?

    Wanneer je een klacht hebt over of een geschil met je registrar dan zijn er verschillende mogelijkheden om tot een oplossing te komen. Hierover lees je meer op pagina klacht over registrar. SIDN heeft geen formele klachtenprocedure voor het behandelen van een klacht over jouw registrar.

  • What conditions do I have to meet as a registrar?

    Would you like to be able to register domain names for customers or for your own organisation by dealing directly with SIDN? If so, you can become a .nl registrar. Read more about the conditions and how to apply for registrar status on the page becoming a registrar.

More frequently asked questions

RIPE NCC DNS Measurements Hackathon

  • Wednesday 26 April 2017

SIDN Labs' Giovane Moura, Moritz Müller and Jan Harm Kuipers were part of a team that earned an honorable mention by the jury of the RIPE NCC DNS Measurements Hackathon for their work on anomaly detection on authoritative DNS server traffic.

RIPE NCC organized a DNS measurement hackathon on April 20-21 in Amsterdam, an event that brought together topnotch engineers, researchers, designers, among others, to take up an internet measurement challenge and develop prototypes that benefit from the RIPE Atlas measurement network.

We, Giovane, Moritz and Jan Harm, together with colleagues from the University of Twente, Delft University of Technology, and VivaCell, formed the Schnabeltier/Anomalizers team. Our main goal was to develop a tool to detect anomalies on the Root DNS system, ccTLDs, and other DNS providers based on the RIPE Atlas measurements.

Team Schnabeltier (from left to right): Giovane Moura (SIDN Labs), Jan Harm Kuipers (SIDN Lab and University of Twente), Ricardo de Oliveira Schmidt (University of Twente), Christian Dörr (Delft University of Technology), Ella Titova (VivaCell) and Wouter de Vries (University of Twente).

Team Schnabeltier (from left to right): Giovane Moura (SIDN Labs), Jan Harm Kuipers (SIDN Labs and University of Twente), Ricardo de Oliveira Schmidt (University of Twente), Christian Dörr (Delft University of Technology), Ella Titova (VivaCell) and Wouter de Vries (University of Twente). Not in the picture: Moritz Müller (SIDN Labs).

Building on the results and experience from our ACM IM2016 paper on the DDoS attacks on the Root DNS system, we used RIPE’s K-Root measurement datasets to evaluate the performance of three algorithms for anomaly detection on the reachability and performance of K-Root. We also showed how network paths and anycast catchments of RIPE Atlas probes change during DDoS attacks. Anomalies in these metrics can also indicate incidents on the Internet BGP hijacking.

The software that we developed during the hackathon to automate the download, analysis, and visualization of DNS measurement is publicly available on Github. We invite the readers of this blog to follow our presentation and check out our demo.

Action picture hacketon

Overall, we look back on a great event that provided us with the opportunity to develop a tool that can be used not only at SIDN, but also any cc/gTLD service provider that is monitored by the RIPE Atlas platform. The hackathon was also  a great chance to network and to learn from other inspiring hackathon projects. Thanks to RIPE NCC and the sponsors for organizing this awesome event. We’ll definitely be back next year!