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Unhappy about something we've done, or failed to do? Please let us know, so that we can put it right.

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Call +31 26 352 5555 or mail Otherwise, use the form at the bottom of the page. It may be useful to ask for the same person you dealt with before. If you have a solution in mind, please mention it. We'll do our best to get back to you by the next working day.

Get more info about various types of problem:


Registratie & Service

Manager Registration & Services

+31 26 352 55 55

If you have a question, complain or suggestion, please contact one of our support employees. You can contact us from 08.00 tot 18.00 hrs.

  • Monday 29 October 2018

    SIDN Labs

    Towards automated, MUD-based DDoS protection


    Reduce the risk of insecure IoT devices

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  • Thursday 18 April 2019


    Just four weeks until the root KSK rollover: time to check your DNSSEC trust anchors!


    Check your DNSSEC trust anchors!

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  • Tuesday 27 February 2018

    .nl domain name

    A tale of two TLDs


    Marketing the .ca and .nl domains

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