The Membership Administration

Like every large organisation the Chaos Computer Club doesn’t get by some bureaucracy. The office manages all your matters regarding your membership or Datenschleuder subscription.

From the membership administration, to identify you easily, you’ll get a small (at the time 5 digit) number assigned. We call this number Chaosnummer (chaos number). Once you became a member the membership administration will make sure that your name appears on your designated Datenschleuder and the cash desks at the Congresses and Camps know to give you a discount. If you let the payments slide for too long the membership administration might send you friendly payment reminders as well.

You can get in touch with the membership administration via e-mail at, and we recommend – as for any e-mail communication – to encrypt your e-mails to us using PGP (our key). The current key’s fingerprint is:

pub   rsa4096 2021-03-30 [SC] [expires: 2022-03-30]
      5708 703C 2CFB F52B 8F33  5082 1343 46C0 538A B4E2
uid           [  full  ] CCC Membership Desk (Key 2021) 
uid           [  full  ] CCC-Mitgliederverwaltung (Key 2021) 
sub   rsa4096 2021-03-30 [E] [expires: 2022-03-30]

The membership administration is also available via snail mail at

Chaos Computer Club e. V.

Zeiseweg 9
22765 Hamburg


Before you contact the membership administration please check quickly in our membership section or in our FAQ. Maybe your question is answered there already.