some DNS public servers

Google

    8.8.8.8
    8.8.4.4

Dnsadvantage

    156.154.70.1
    156.154.71.1

OpenDNS

    208.67.222.222
    208.67.220.220

Norton

    198.153.192.1
    198.153.194.1

Verizon GTEI DNS

    4.2.2.1
    4.2.2.2
    4.2.2.3
    4.2.2.4
    4.2.2.5
    4.2.2.6

Comodo Secure DNS
  
    8.26.56.26
    8.20.247.20