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We check this website, now coursedoor.com is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is coursedoor Down Right Now?
- NO! coursedoor is up!
If you have problem with access to site coursedoor, and domain coursedoor.com is not avalible.

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• Check your network setting, and contact your ISP support if its needed.

Also, check your hosts file (wikipedia about hosts file) for some records about domain coursedoor.com. And try to remove it.

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