Kindly be informed that we recently have received some feedback from customers regarding some issue. They encountered while using Google DNS and browsing their domain.
It has come to our attention that there are some problems with Google’s Public. DNS (188.8.131.52 and 184.108.40.206) due to DNSSEC validation failure.
Our system administrators are already looking into this issue and contacting Google to make them aware of this issue as well.
In the meantime to resolve the intermittent issues with site reachability, kindly please change your DNS settings to default or use OpenDNS IPs (220.127.116.11, 18.104.22.168) instead to resolve this known issue for the time being.
Your cooperation and understanding on this are much appreciated.