The most basic task of DNS is to translate hostnames such as theos.in to IP address such as 74.86.49.131. In very simple terms, it can be compared to a phone book. DNS also has other important use such as email routing.

This is my list of better, fast public dns servers and free dns server (as compare to your ISP / DSL / ADSL / cable DNS service providers dns servers). These dns servers are free to all. I was able to improve my browsing speed with following DNS servers. Use any one of the following provider.

Free Public DNS Server

=> Service provider: Google
Google public dns server IP address:

• 8.8.8.8
• 8.8.4.4

=> Service provider:Dnsadvantage
Dnsadvantage free dns server list:

• 156.154.70.1
• 156.154.71.1

=> 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 (now Verizon)
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

How do I change or setup DNS server IP address?

Visit below mentioned site to setup DNS as per your operating system:

• Linux operating system.
• FreeBSD operating system.
• Sun Solaris operating system
• Microsoft Windows 7 / Vista / XP / Server 2000 / 2003 / 2008 operating system.
• Home ISP router / wifi Router