Best of luck there, as maniakaz mentioned above their contact info, only problem there is that the domain is down good chance you wont be able to contact them via that email either, hrrm, 4-5 days is quite long, not looking good, hope you have backups and already are looking at new possible host's, regardless best of luck hope there back soon for you!
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Will try to contact them by the phone number listed above. Hopefully they will come back. I have over 100 sites and most are hosted on my private servers. However, when I bought these 2 domains they were already hosted with those guys and I had 8 months left on that hosting plan...so I took it easy with transferring them out.
The worst part is that I donīt have a backup for those two domains ..so if they (the company) are really gone forever - I am screwed
We will see what happens...thanks for the help so far.