Free Public DNS Server

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

GTEI DNS (now Verizon)

4.2.2.1
4.2.2.2
4.2.2.3
4.2.2.4
4.2.2.5
4.2.2.6

ScrubIt

67.138.54.100
207.225.209.66