First time accepted submitter Nexus Unplugged writes "Free domain provider co.cc seems to have quietly and mysteriously disappeared. No official explanation has yet been provided, but a cached copy suggest that they stopped accepting new registrations some time ago. Speculation, however, seems to come to a single conclusion. From the article: 'Due to its free nature (and it's $10 for as many as you want), Co.CC was abused and used for scams and spamming and was even de-listed by Google at one point although they did re-enable it. Getting back to the article on hand a few days ago Co.CC seems to have removed its DNS records which ultimately has stops its own site from working and every sub domain it provided.'
It's worth noting that free domains are still easily obtainable from places like DotTK."