Google yesterday banned all .co.cc domains and right now various antivirus softwares are also treating .co.cc website as phishing site. The .co.cc TLD providers were providing not only free domain but various dns related services for free as well but Google has banned them because people were mostly using their services for spamming purposes.
Although .co.cc was verified by Verisign through a company Enic. However according to Matcutts perspective its usual practice that Google reserves rights to ban such domains if number of spammy sites increases .
Google has also suggested on Adwords Help to not use .co.cc domains or even do not link .co.cc domains with your site as this may treated as bad neighborhood and may cause penalty on your site as well.
Another explanation is offered by a June 17th post on the Google Online Security Blog which states: Bulk subdomain providers register a domain name, like example.com, and then sell subdomains of this domain name, like subdomain.example.com. Subdomains are often registered by the thousands at one time and are used to distribute malware and fake anti-virus products on the web. In some cases our malware scanners have found more than 50,000 malware domains from a single bulk provider.
Google’s automated malware scanning systems detect sites that distribute malware. To help protect users we recently modified those systems to identify bulk subdomain services which are being abused. In some severe cases our systems may now flag the whole bulk domain.
Google’s JohnMu offered up some help explaining what website owners can do to remedy this situation for themselves: If you feel that your particular site is in line with our Webmaster Guidelines, I would recommend submitting a reconsideration request. Additionally, if you use a subdomain on a widely used domain name, and feel that your subdomain provider is not up to par with regards to preventing and handling abuse quickly – be it webspam, phishing, or malware – you may wish to look into ways of remedying that.
Now might be a good time to go through our list of free domain name providers and look into making the switch to another provider – or maybe it’s time to grab one of the domain name coupons we always post about and pick up a TLD for yourself.