We check this website, now domainprovider.de is up and dont blocked for our system and other users of the Internet.
So, answer to question: Is domainprovider Down Right Now? - NO! domainprovider is up!
If you have problem with access to site domainprovider, and domain domainprovider.de is not avalible.
Clear browser cache and/or try other web browser
(Chrome, Firefox or Safari).