An unknown number of sites that use online services from domain registrar GoDaddy.com have been knocked offline today. A member of the activist group Anonymous is claiming responsibility for an attack targeting and overloading the company’s servers.

Sites reporting problems include Zipline Games and the newly launched ThingsWeStart site, featured on GeekWire earlier today.

“I’m taking godaddy down bacause well i’d like to test how the cyber security is safe and for more reasons that i can not talk now,” wrote Twitter user AnonymousOwn3r after claiming responsibility for the attack.

The problem appears to be affecting sites that use GoDaddy services including hosting and DNS. If your site is down or you spot any that are, please let us know in the comments.

More coverage at TechCrunch and CNet News.

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