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  • The details registered about me/my company are incorrect or out of date.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

Graph theory for domain name registries

This project involves applying graph theory to the analysis of large volumes of DNS data and related datasets, such as the Whois and registration transactions.

Aim

The aim of the project is to evaluate how useful graph theory is for analysing large volumes of registry data, particularly with a view to further enhancing the safety and stability of .nl, the DNS and the internet in general.

Expected results

The project is expected to yield the following results:

  • A model of the types of object that SIDN manages in its role as .nl registry (e.g. registrar, registrant, name server and domain name transaction) and the interrelationships amongst those objects

  • A instantiation of the model with Apache Spark, based on operational data

  • Applications/usage cases and visualisations of the model, e.g. for detecting botnets, phishing scams or malicious domain name registrations

  • A study report

Profile

We are looking for a highly motivated MSc student with a passion for internet technology, mathematics, data analysis and their visualisation. You are energised by investigating exactly how mechanisms and systems work and you are able to devise and evaluate solutions. The ideal candidate is a self-starter with an enquiring mind, capable of developing proofs of concept.

Interested?

If you are interested in this project, e-mail labs@sidn.nl explaining why you think you are the right person to carry it out. Questions can be mailed to the same address.

About SIDN Labs

SIDN manages the Dutch national internet domain, .nl. We are an innovative domain name registry with our own DNS anycast network and more DNSSEC-secured domain names than any other top-level domain in the world (2.4 million of the 5.5 million .nl domain names). SIDN Labs is our R&D arm, which develops and evaluates new technologies and systems with a view to further enhancing the stability and security of .nl, the DNS and the wider internet. On our ENTRADA big data platform, we retain more than a year's DNS data, including about 65 billion unique DNS queries, of which we receive 150,000,000 a day. More information on www.sidnlabs.nl.

Article by:

Cristian Hesselman

Cristian Hesselman

Director SIDN Labs

I'm responsible for SIDN Labs, SIDN's research team. I oversee our research activities, support the SIDN Labs team and develop new in-house and collaborative projects.