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  • The details registered about me/my company are incorrect or out of date.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

Domain names

  • Whois Is your perfect .nl still free or who is the registrant
  • Domain Name Portfolio Checker Provides a full breakdown of your .nl domain names
  • .nl domain name All about .nl: registration, changes and tips
  • .nl Control Maximum control over changes on your domain name
  • .nl suggestion tool Create your perfect .nl
  • Registry services Expertise to help you set up and run your own domain
Overviewpage Domain names

Who we are

  • Where we stand for For confidence online
  • Our milestones SIDN’s history
  • Our organisation Supervisory board, CEO and management
  • Work at SIDN Our corporate culture and vacancies
Overviewpage About SIDN

What we do

  • Our core business Stability and security of .nl, share expertise and give advice
  • Our annual reports Our results and accountability
  • Our impact How we set out our impact at 3 fields
  • Sponsoring Sponsored projects and organisations

SIDN Labs

  • About SIDN Labs Our research team
  • Publications Follow our developments
  • Stats About the use of the .nl-zone
  • Tools and Measurements Which are available for anyone
Homepage SIDN Labs

News

  • News and Blogs About domain names, cybersecurity and online identity
  • Publications Our (white)papers, presentations and webinars
  • Newsletters Stay informed with the latest news by e-mail
  • Press Press contact, Press list and the press photo gallery

Cybersecurity

  • SIDN BrandGuard Brand protection against phishing and reputational damage
  • Logo detection Detect online use and abuse of your logo
Overviewpage Cybersecurity

Vacancies

  • Java Backend Engineer

    Work in the world behind .nl, shaping the future of domain name registration.

  • Cloud Platform Engineer

    Are you happiest with your head in the cloud? Become our Cloud Platform Engineer, building and managing our cloud platform

  • Cloud Network Engineer

    Are you happiest with your head in the cloud? Take your expertise to the next level!

More vacancies

News

  • Thesis: PQC for the RPKI

    Thursday 26 June 2025

    SIDN Labs

    Dirk Doesburg researched how the RPKI can be made quantum-safe

    Read more Thesis: PQC for the RPKI
  • BGPsec - Could you run it if you wanted to?

    Tuesday 15 April 2025

    SIDN Labs

    Evaluating the current state of BGPsec implementations through hands-on experiments

    Read more BGPsec - Could you run it if you wanted to?
  • Monitoring highly distributed DNS deployments: challenges and recommendations

    Tuesday 25 March 2025

    SIDN Labs

    The root server system as a use case examined

    Read more Monitoring highly distributed DNS deployments: challenges and recommendations
More news and blogs

News

  • Come to SIDN Inspire at the ECP Annual Festival

    Tuesday 1 July 2025

    About SIDN

    Two organisations, one event

    Read more Come to SIDN Inspire at the ECP Annual Festival
  • Findability is a big challenge for businesses in the AI era

    Thursday 26 June 2025

    Domain names

    Make sure people are talking about you online

    Read more Findability is a big challenge for businesses in the AI era
  • New platform provides info on Dutch organisations’ electronic accessibility

    Wednesday 25 June 2025

    About SIDN

    SIDN Fund supports important initiative by the Internet Cleanup Foundation

    Read more New platform provides info on Dutch organisations’ electronic accessibility
More news and blogs
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    Contact SIDN Support
  • Do you have any questions or suggestions?

    Contact SIDN Support

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Domain names

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