Q. My ISP DNS servers are overloaded, can you give me free dns server IP address for fast name resolution?

A. You can try following fast DNS server free of cost. I've personally used them and they offer reliability, speed and security. All you have to do is punch following two IP address into your router or computer DNS list.

OpenDNS Free DNS Server IP address

=> 208.67.222.222
=> 208.67.220.220

ScrubIT Free DNS Server IP address

=> 67.138.54.100
=> 207.225.209.66

How do I setup DNS Server IP address?

Under Linux / UNIX / Solaris / BSD operating systems, just open your /etc/resolv.conf file and add above IP address:
nameserver 208.67.222.222
nameserver 208.67.220.220

Using Google Public DNS

Google Public DNS IP addresses

The Google Public DNS IP addresses (IPv4) are as follows:

• 8.8.8.8
• 8.8.4.4

The Google Public DNS IPv6 addresses are as follows:

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

You can use either number as your primary or secondary DNS server. You can specify both numbers, but do not specify one number as both primary and secondary.
You can configure Google Public DNS addresses for either IPv4 or IPv6 connections, or both.