Adjusted opening times during the holidays

During the holiday period, our opening times will be adjusted.

Our phone lines will be open at the following times:

  • Thursday 24 December: 08.00 – 16.00

  • Friday 25 December: closed

  • Thursday 31 January: 08.00 – 17.00

  • Friday 1 January: closed


Naturally, you can e-mail enquiries at any time to

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We wish you an enjoyable holiday period and a successful 2016.


  • Friday 19 April 2019

    Internet security

    Major data breach at youth services organisation could have been prevented


    Others warned about the risk posed by cancelled domain names

    Read more
  • Monday 3 September 2018


    DNSSEC-validating DNS service: successful pilot completed


    "It's high time access providers in the Netherlands enabled validation"

    Read more
  • Monday 29 October 2018

    SIDN Labs

    Towards automated, MUD-based DDoS protection


    Reduce the risk of insecure IoT devices

    Read more


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