(Free & Public DNS Servers (Valid December 2015

Provider	Primary DNS Server	Secondary DNS Server
Level31	209.244.0.3	209.244.0.4
Verisign2	64.6.64.6	64.6.65.6
Google3	8.8.8.8	8.8.4.4
DNS.WATCH4	84.200.69.80	84.200.70.40
Comodo Secure DNS	8.26.56.26	8.20.247.20
OpenDNS Home5	208.67.222.222	208.67.220.220
DNS Advantage	156.154.70.1	156.154.71.1
Norton ConnectSafe6	199.85.126.10	199.85.127.10
GreenTeamDNS7	81.218.119.11	209.88.198.133
SafeDNS8	195.46.39.39	195.46.39.40
OpenNIC9	50.116.40.226	50.116.23.211
SmartViper	208.76.50.50	208.76.51.51
Dyn	216.146.35.35	216.146.36.36
FreeDNS10	37.235.1.174	37.235.1.177
Alternate DNS11	198.101.242.72	23.253.163.53
Yandex.DNS12	77.88.8.8	77.88.8.1
censurfridns.dk13	89.233.43.71	91.239.100.100
Hurricane Electric14	74.82.42.42
puntCAT15	109.69.8.51

Best Free Public DNS Servers

 Google Public DNS

Google being Google, they have massive scale, load-balancing, redundancy and DNS servers distributed all over the world. They also support the latest technologies and security mechanisms like IPv6 DNS servers and DNSSEC. Their DNS servers are also well protected against DoS attacks and cache poisoning attacks.
It’s worth noting that Google Public DNS does not perform any blocking or filtering on the DNS requests, as some of the other services do. They state that only under extraordinary circumstances would they block anything. For me, this is a good option because I use other tools to filter out malware sites, etc and don’t necessarily want my DNS service to be involved.
The main benefit for using Google is their global data center and the fact that they have DNS servers located around the world. Some other services only have DNS servers located in one part of the world, so the performance will suffer considerably.
The main downside to using Google is that they are all about tracking and logging everything anyone does on the Internet and this is no exception. If you are leery of Google having too much information, I would suggest using a different DNS server.
Google Public DNS IPv4 Addresses
8.8.8.8

8.8.4.4
Google Public DNS IPv6 Addresses

2001:4860:4860::8888
2001:4860:4860::8844
 

Disable TCP/IP auto-tuning

If you're encountering certain issues with your online games and applications (MSN Messenger, Skype...etc) under Vista, you can try to disable the TCP/IP auto-tuning to improve the network performance.

• Simply open a command prompt in administrator mode
• Start>type "CMD" in the Search Bar and press CTRL+SHIFT+ENTER.
• Then simply type the following command:

  • netsh interface tcp set global autotuning=disabled

• Reboot your PC.
• To enable this option again, use the folloeing command:

  • netsh interface tcp set global autotuningl=normal