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No OK is operated by

eBlocker GmbH
Eppendorfer Landstr. 39
20249 Hamburg

Managing Directors

Dipl.-Math. Christian Bennefeld (CEO)
Dr. Reinhard Sell (CTO)
Dipl.-Phys. Boris Prinz (Authorized Representative)

eBlocker Support

For technical support please go to

Currently we do not offer support via telephone.


Mo.- Fr. 09:30h-18:00h CET
Tel: +49 40 23 20 50 50 (no support)
Email: (no support)

Press Contact

Christian Bennefeld
eBlocker GmbH, Hamburg, Germany
Tel. +49 40 23 20 50 50

Registry & Registration Number

Amtsgericht Hamburg, HRB 133155

VAT ID Number Germany




Copyright & Disclaimer

The copyright for all content on this website is reserved. Any duplication or use of objects such as trademarks, logos, videos or texts is not permitted.

This website may contain links to external websites. Despite careful content control we do not take responsibility for any externally provided content or for the contents of linked websites. The providers of these external websites are solely responsible for the content presented by these websites.


eBlocker as well as the eBlocker icon are registered trademarks of eBlocker GmbH. The use of the trademarks, icons and logos of eBlocker GmbH is prohibited to third parties without written licence of eBlocker GmbH.

Facebook & Twitter

This legal information also applies to the following Facebook page
and to the following Twitter page

Online Dispute Resolution Platform of the EU

The Online Dispute Resolution Platform is the official website managed by the European Commission dedicated to helping consumers and traders resolve their disputes out-of-court. Please finde the website here