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  • The details registered about me/my company are incorrect or out of date.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

Tangled: A Cooperative Anycast Testbed

Research paper wins IM 2021 Best Experience Paper Award

Connections around planet earth viewed from space at night

The research paper “Tangled: A Cooperative Anycast Testbed” has received the Best Experience Paper Award at the 2021 IFIP/IEEE International Symposium on Integrated Network Management. The paper was the product of research led by the University of Twente in collaboration with Tesorion, the University of Passo Fundo, the University of Rio Grande do Sul, and us at SIDN Labs.

Image of the IM 2021 Best Experience Paper Award, which SIDN Labs won, among others, for the paper 'Tangled: A Cooperative Anycast Testbed'

What is Tangled?

As part of a joint research project with the University of Twente, we have developed an open anycast testbed called Tangled, which is freely available to the community. Tangled is unique because it focuses on helping researchers carry out anycast experiments, without having to spend time on setting up the infrastructure. This “as-a-service” model means that researchers can focus on their anycast experiments and on understanding effects on the Internet.

Tangled has several nodes connected to commercial ISPs and, at some locations, directly to Internet Exchange Points. Table 1 shows the locations of our nine nodes.

Table of Tangled anycast nodes locations
Table 1: Tangled anycast nodes.

Because Tangled connects to multiple Autonomous Systems (ASs), it is able to use multiple traffic engineering policies. Table 2 summarises some of the available policies and the respective neighbouring ASs.

Table 2 of the active traffic management policies
Table 2: Enabled traffic engineering policies.

We have recently added support for PATH poisoning and incorporated IXP communities into our API. We are happy to add more features to our testbed, as required by the community. You can find more details in our paper.

Why another testbed?

We got involved in Tangled because of its unique focus on helping network researchers and because it complements our own Anycast2020 testbed, which enables us to dynamically instantiate anycast services across the globe to match traffic demand. Also, we believe that deploying testbeds in the wild is the most technically representative way to continually perform anycast measurements and experiment with configurations and concepts. This is important because anycast is a key building block for our DNS services for .nl, which are a vital service for the Netherlands. At SIDN Labs, we will continue to progress our studies in this field through collaborations and applied research, in fields such as anycast catchments and their performance and the management of DDoS attacks on anycast networks. Note: this was my last blog for SIDN Labs because I’ll be continuing my career at Protonmail as of June 1, 2021.

Article by:

João Ceron

Research Engineer