Every once in a while (it doesn’t happen very often) DNS servers would stop resolving certain domains causing intermittent issues when accessing the Internet. To solve the DNS issues, I often switch DNS servers on my main router. Changing DNS servers may require rebooting your router.
So, here’s a list of DNS servers you could use on your router, in case the current DNS servers you are using is having problems. I primarily use OpenDNS and Google DNS servers, but others DNS servers are reliable as well.
188.8.131.52 Primary 184.108.40.206 Secondary
220.127.116.11 Primary 18.104.22.168 Secondary
22.214.171.124 Primary 126.96.36.199 Secondary
188.8.131.52 Primary 184.108.40.206 Secondary
220.127.116.11 Primary 18.104.22.168 Secondary
22.214.171.124 Primary 126.96.36.199 Secondary
188.8.131.52 Primary 184.108.40.206 Secondary