The ever popular Co.CC company which provided free as well as paid Co.CC domains has closed down, without giving any warning to the customers. All the Co.CC domains are currently down and can no longer be accessed. Co.CC had stopped accepting new users some time before they closed down. Users were used to be greeted with a message saying "A new .co.cc domain cannot be registered" .
As of now, the company has not given any formal statement about the closing down of their service. Customers, unsure of what has happened and whether or not it is a "problem" which can be fixed, have taken to the company's Facebook page to voice their anger.
Many speculations are being made as to what might have caused the company to close down their service(if it did close down.) Co.CC domains were notorious for their website contents. It was mostly used by spammers (to create "splogs"), hackers, and for hateful speeches, copyright infringement and different illegal purposes. In fact, in July 2011 Google had removed over 11 million .co.cc websites from its search results due to the domains being largely used by spammers. Google did start re-indexing the sites later, though. Facebook had also resorted to block the Co.CC domains from being mentioned on the chat.
People are taking this (i.e the site being used for spamming and illegal purposes) as a reason why the company could have closed down. It could also be that one of their domain is under investigation for some illegal act.
Another possibility could be that, the registrar of the main Co.CC company itself took the action as to bring the company down.
There are also many legitimate users of Co.CC domains and the sudden shut-down has struck as a nightmare to them. I guess, even if the company does return back, many of the customers will definitely stop using their domains, as a company which closes down without giving any warning to its customers is not trust-able at all.
Without any formal response from the company, we can't say for sure what might have triggered such an action. But, I hope they return back, with a good reason for their down time and with a promise to take stricter actions against spammers.
For those of you who are looking for an alternative, I have made a list of probable Co.CC alternatives here.