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Frequently visited

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  • The details registered about me/my company are incorrect or out of date.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.

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TimeNL: the transparent new NTP service from SIDN Labs

TimeNL
Marco Davids at the GPS/Galileo and DCF77 antennas on the roof of the SIDN building.

At SIDN Labs, we've created TimeNL, a new service that internet-enabled devices can use for time synchronisation. Time services based on the NTP standard, such as TimeNL, play a vital role for many internet applications. However, the lack of transparency regarding the public and non-public services that are available is problematic, making it hard for users to make an informed choice.

More about TimeNL

  • Tools & Measurements

    We develop tools and do measurements which are available for anyone.

    Visit tools and measurements

    Read more Tools & Measurements

  • Publications

    Read the SIDN Labs papers, internetdrafts and our presentations.

    Read our publications

    Read more Publications

  • Statistics

    Look at the actual stats about the use of the .nl-zone. The .nl domain is one of the largest gTLD's worldwide.

    Take a look at our statistics

    Read more Statistics

Do your thesis with us

Are you an MSC student looking to start work on your master's thesis? Then check out what SIDN Labs has to offer!

In his final year studying Artificial Intelligence at Radboud University, Nijmegen, Robin de Heer needed an internship where he could work on his thesis. After finding the opening he wanted at SIDN Labs, he started his research in September 2019. A year on, we asked him about the experience.

Read Robins story

Doing your thesis at SIDN Labs?

Robin de Heer