Google Public DNS  & OpenDNS  are  the public dns servers you can trust  and it is free. It is designed  to  speed up  and  help  secure the Web  browsing  experience by  leveraging a  fast  worldwide  network of  DNS  servers. On 3 December 2009, Google launched its Public DNS service.  Google Public DNS is a free Internet name resolution service similar to the free version of OpenDNS, What’s the difference between these two services? As of now, OpenDNS is the more established product, having existed for four more years than Google’s and offering more options for setup and control. Which one is faster, or more secure, can be debated. DNS performance vary up on the location you are using it. For example, if you use your ISP DNS and you traveled to another country, you will not get similar performance from your ISP DNS from another country. You should use the DNS that is geographically near to you.

DNS and your Security

Choosing a DNS is very important it can be dangerous some time if you choose a bad DNS provider. A DNS server basically resolves the website IP address in your web browser. There is a chance that a DNS provider can redirect to the wrong location for the website you are looking for. For example, if you type openspeedtest.com in your address bar and it should first go to your DNS server and ask for the IP address  for openspeedtest.com if the DNS return wrong IP address you will probably get wrong location instead of actual openspeedtest.com. So always choose a DNS server from a trusted provider.

OpenDNS: 208.67.222.222 and 208.67.220.220

Google, DNS: 8.8.8.8 and 8.8.4.4

Which is better for you?

It is totally depends upon Your location, it is all about which server is near to you, so you need to test the server what ever it is your isp dns, google dns, open dns  or what ever it is.

How to test your DNS?

There is an easy way to test your DNS

1) Open CMD and type this Command: prompt $t 

That changes the DOS prompt to the current time, we will need this to calculate the time it takes to execute any DOS command

2) Now run This command : nslookup www.google.com 125.22.47.125

Where 208.67.222.222 is the standard IP address of OpenDNS server,  8.8.8.8  is the standard IP address of  the Google Public DNS

You can find the time takes to resolve the address by calculating the difference between the two timestamps. So you can choose Less time stamp, IPip address that will be best for you.

Here is my results, I decided to use Google public dns!

Complete a speed test on Openspeedtest.com

DNS Speed Test

Alternatively, you can use a graphical user interface tool called NameBench

What is Namebench?

It hunts down the fastest DNS servers available for your computer to use. namebench runs a fair and thorough benchmark using your web browser history, tcpdump output, or standardized datasets in order provide an individualized recommendation. namebench is completely free and does not modify your system in any way.

Namebench is available for windows, Mac and Linux for free. It is a safe tool to use and works like magic! Go ahead and try Namebench today.