Following the good will by Google many other providers made their DNS servers available to us without any limitations as recursive resolvers. As they do not announce it widely enough you may not have heard abouth them, here is the list of these DNS servers:.
  • OpenDNS:
    208.67.222.220
    and
    208.67.222.222
  • Hurricane Electric (he.net)
    74.82.42.42
  • OpenNIC (http://www.opennicproject.org/)
    50.116.23.211
  • VeriSign
    64.6.64.6  and  64.6.64.4
  • Comode Secure DNS
    8.20.247.20  and  8.26.56.26
  • Level3
    209.244.0.3  and  209.244.0.4
  • Free DNS https://freedns.zone/en/
    37.235.1.174  and 37.235.1.177
  • DynDNS
    216.146.35.35  and  216.146.35.36