Free DNS server IP List:-
=> Service provider: Google
Google public dns server IP address:
         8.8.8.8
         8.8.4.4
=> Service provider:OpenDNS
OpenDNS free dns server list / IP address:
        208.67.222.222
        208.67.220.220
=> Service provider:Norton
Norton free dns server list / IP address:
      198.153.192.1
      198.153.194.1
=> Service provider: GTEI DNS (NowVerizon)
Public Name server IP address:
        4.2.2.1
        4.2.2.2
        4.2.2.3
        4.2.2.4
        4.2.2.5
        4.2.2.6  
=> Service provider: ScrubIt
Public dns server address:
        67.138.54.100
        207.225.209.66