Some guy in India named Vivek has a list of free DNS servers, which was last updated December 12, 2010. This page was also posted at Host Outcast on June 7, 2011. The list was the same on both pages.
He lists the servers from:
- Google: 8.8.8.8 and 8.8.4.4
- DNSAdvantage (now Neustar): 156.154.70.1 and 156.154.71.1
- OpenDNS: 208.67.222.222 and 208.67.220.220 (check near the bottom of the page; I do not see a separate page about it)
- Norton: 198.153.192.1 and 198.153.194.1 (I cannot find a page on their site, but I tried them with the “host” command and they seem to work)
- GTEI DNS (now Verizon) (no link provided): 4.2.2.1, 4.2.2.2, 4.2.2.3, 4.2.2.4, 4.2.2.5 and 4.2.2.6
- ScrubIT: 67.138.54.100 and 207.225.209.66