Piet Beertema

Piet Beertema is a Dutch internet pioneer and the founder of .nl.

Piet Beertema founder of .nl

Piet Beertema

Piet Beertema is a Dutch internet pioneer, who first came across a computer at the National Aerospace Laboratory. In 1966, he took up the post of System Manager at the Centre for Mathematics and Informatics (CWI), where he continued to work until his retirement. On 25 April 1986, administrative control of the newly created .nl domain was delegated to the CWI (in the person of Beertema) by Jon Postel (IANA). Thus, Beertema effectively became the founder of .nl.

On 31 January 1996, together with Boudewijn Nederkoorn and Ted Lindgreen, Beertema established SIDN (the Foundation for Internet Domain Registration in the Netherlands) and took a seat on the new organisation's board. In 1999, he became a Knight of the Order of the Netherlands Lion (an honorary title awarded to prominent scientists and others). On 14 July 2011 he laid the final ceremonial brick of SIDN's new office complex.

First European e-mail via internet

First e-mail


  • Thursday 4 July 2019

    Internet security

    CGNAT frustrates all IP address-based technologies


    IPv4 is creaking at the seams

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  • Friday 12 April 2019

    SIDN Labs

    Using machine learning to make the internet more secure


    4 challenges we'll be tackling in the period ahead

    Read more
  • Wednesday 25 July 2018

    SIDN Labs

    How is IPv6 support measured for the Registrar Scorecard?


    How we go about it

    Read more


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