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The Chaos Computer Club Lëtzebuerg (C3L) is a non-profit / non-governmental organization based in Luxembourg (Europe). Founded in 2008 with the idea of leaning our objectives to the ones of CCC in Germany, C3L has become an autonomous and active club.

The association's purpose is it to question everything what has already been questioned and analyze systems in its details.

  • Encouraging Freedom of Communication & Information, Net Neutrality and Privacy
  • Analyzing and understanding systems
  • Encouraging a critical dealing with technology
  • Satisfying curiosity

All projects, documentations, records, press releases and so on, are being stored and made publicly available in the Repository of Knowledge (RoK) or simply called, the wiki.

entr0py is the official radio show of C3L aired live from the studios of Radio ARA. We're on air every 4th weekend on Saturdays; so nearly once a month. The topics we're treating are widespreaded and of all different kinds of nature; from ITSecurity to the cyberpolitical realities in all of our lives, the heaviest bugfucks of the month, as the analysis of technologies in its details. Round discussions and a lot of humor is of course a part as well of the show.

entr0py Jingle

If you hear this audio snippet in the future, please consider staying on the channel, be it online or on good old analog radio.


The membership is open for every individual or entity. By becoming a member of C3L, you will actively support the resitance. Download the membership form and send it back to us, either by e-mail or snail mail.


As a non-profit organization we do not receive any significant income, beside our yearly membership fees. So, we depend quite a lot on generous donations from the fellow supporters. If you agree with our work and activities, you might consider on helping keeping our heads above water by supporting us with a donation - any kind. Donation as in helping us on projects is highly accpeted as well.

Account holder: Chaos Computer Club Lëtzebuerg A.S.B.L.
Bank: Banque et Caisse d'Épargne de Luxembourg
IBAN: LU29 0019 2855 3890 4000

General inquiries can either be sent to us via info@c3l.lu, Twitter or Snail Mail:

Chaos Computer Club Lëtzebuerg A.S.B.L.
BPM 381892
34, Rue Gabriel Lippmann
L-5362, Munsbach


Press inquiries will be processed as fast as possible, if sent to press@c3l.lu.

We'd be very glad to see your institution subscribed to our press mailing list, which is the main communication channel for distributing press communiquees.

If no one replies to the press phone, please send a text message with a way to get back to you and we will do so as soon as possible:

Mailing List

If you would like to receive monthly updates on our activities and projects, you might consider to subscribe to our Announce mailing list (very low traffic).

XMPP Multi user chat

During our meetings, you can join us on our XMPP MUC channel, located at c3l@conference.c3l.lu.

All mail addresses have been assigned with the following GPG key: 0x5C4E4490

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