The Office

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 office, 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 office 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 office might send you friendly payment reminders as well.

You can get in touch with the office 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   rsa4096/04268556 2018-02-02 [SCA] [expires: 2019-03-30]
Key fingerprint = 7845 0E35 3C70 05BA E2E7  CDDA 5E71 40C3 0426 8556
uid         [ultimate] CCC Office Key (CCC Mitgliederverwaltung, Key 2018) <>
sub   rsa4096/DCC6DBF2 2018-02-02 [E] [expires: 2019-03-30]

The office is also available via snail mail at

Chaos Computer Club e. V.

Zeiseweg 9
D-22765 Hamburg


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