You don’t have to use your ISP’s DNS servers and sometimes can get better results with others. Try these:
Now part of the Cisco empire, the primary is 188.8.131.52 with a backup on 184.108.40.206.
Available in its basic form on 220.127.116.11 (backup 18.104.22.168)
Comodo Secure DNS
Rather like Google in that there is no configuration – using the service is simply a matter of switching to the services primary and backup servers on 22.214.171.124 and 126.96.36.199.
Available on 188.8.131.52 and 184.108.40.206,is almost unique in offering an alternative DNS service without the website logging found on most others.
VeriSign Public DNS
Not to be outdone, VeriSign recently started offering public servers on 220.127.116.11 and 18.104.22.168.