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Best Free DNS Servers. Why use alternate Public DNS?

Simply, We can not imagine the modern Internet without the DNS. By default DNS settings are set by your ISP. But there are options to alternatively use another DNS. Jump to the list of best public DNS servers available for Free.

What is a Public DNS Server?

Public DNS Servers

Freely available DNS Server which can be used by anyone are known as Public DNS Servers. In 2009 Google Announces DNS server available for everyone to make the internet experience faster and reliable. After that many other organizations started offering free DNS service to the public.  Below is a list of all the popular DNS services offered by the top organizations. Some of the them keep the activity log, some filter the bad websites and some have policy not to keep activity log.

List of Free DNS Servers with their IP Addresses

NameIPv4 AddressesIPv6 Addresses
Free public DNS Servers

You need to provide two IP addresses in the DNS field one as Preferred DNS Server and another as alternative DNS server. In above table use the First IP address as preferred and second as Alternative. Though you can provide only 1 but providing both will improve the stability.

Below are short review of each DNS Service listed above.

1. Google public DNS

Google DNS

Google uses a different methodology for the DNS which makes it most popular and widely used DNS server.  More Detail

IPv4 Addresses: and
IPv6 addresses: 2001:4860:4860::8888 and 2001:4860:4860::8844

2. Cloudflare

Cloudflare dns

Cloudflare & APNIC together managing the dns service. It is also a faster and privacy centric public DNS Resolver. More Detail

IPv4 addresses: and
IPv6 addresses: 2606:4700:4700::1111 and 2606:4700:4700::1001

3. Cisco OpenDNS

Open DNS

Recently OpenDNS was acquired by the Cisco. It has both Free and Paid options. It have the option to block pornography automatically through settings. More Detail

Basic IPv4: and
Family shield IPv4 addresses: and

4. Quad9

Quad 9 DNS Resolver

Quad 9 is new filter DNS server. Its threat intelligence system detect in real time if a website is safe or dangerous. It uses data from more then a dozen cyber security companies to detect the threat in real time. More

IPv4 Addresses : and
IPv6 Addresses: 2620:fe::fe and 2620:fe::9

5. OpenNIC

Open NIC

Open NIC is a project to keep the internet non-censored.  It will show you the best available server to you according to your location. They have more then 50 servers. You can check the status of the servers. OpenNIC does not log any activity. More

IPv4 Addresses: and
IPv6 Addresses:  2607:5300:120:a8a:142:4:204:111 and 2607:5300:120:a8a:142:4:205:47

Some other Public DNS Servers that might be useful for you

Comodo Secure DNS and

Level3 and

DNS Advantage and

Oracle Dyn DNS and

Safe DNS and

Why use custom Public DNS Server?

Here are the points which let us know why should we use alternative public DNS server.

  • Sometimes default DNS server get overloaded and show time out error which makes the internet connection unstable. Switching to alternative address can improve the speed and stability of the internet connection.
  • Some third party DNS servers provide filter features to filter out the porn and objectionable material. It also protects you from phishing attacks.
  • It also fix the search redirection issue due to the DNS set by the ISP.

Below is a comparison provided by Cloudflare with top 3 dns provider vs ISPs. One thing is sure that these public DNS servers are far better then the default ISP DNS servers. These days some ISPs has also started using the Public DNS.

How to find best DNS Server?

Performance of the DNS server varies from location to location. So marking any one server as the best is not possible. You need to check the best performance in your area.

Please share your experience regrading the use of alternate public DNS servers.

What is DNS Server?

DNS is an acronym for Domain Name System. It is a system which match the domain name to the right IP address using the database served by a DNS Server. Domains names are the name of the websites like Google.com, Facebook.com, Amazon.com etc. So a DNS server maintains the list of domain names and their IP Addresses.

Computers use IP addresses to identify and communicate with each other. Each website is also a IP address in the back-end. Remembering IP addresses for each website is not a practical approach so to overcome this issue DNS or domain name system came into the existence.

It let the users to type human readable addresses to open the websites like Google.com, Yahoo.com, Amazon.com etc. In background a domain name is redirect to its IP address to get the content from the server and view it as a web page.

Your computer by default use the DNS server set by your ISP. Different ISPs use different DNS servers. As DNS resolution is the first step taken places when your browse the internet. So DNS service should be reliable and fast for better internet experience. Unreliable DNS Server can lead to DNS Errors or slower internet experience.

Common Errors related to DNS

you can get the below error message in the chrome browser. In different browser they can be slightly different.

  • DNS Lookup Failed on Google Chrome
  • DNS Server Not Responding On Windows

Sometimes these common DNS Errors can be fixed by using a third party / alternate DNS server known as Public DNS Servers. See how to change the alternate DNS Server.

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