Protokol DNS adalah bagian penting dari infrastruktur Web, melayani sebagai buku telepon Internet: setiap kali Anda mengunjungi sebuah website, komputer Anda melakukan lookup DNS. Halaman yang kompleks sering membutuhkan beberapa DNS lookup sebelum mereka mulai memuat, sehingga komputer Anda dapat melakukan ratusan pencarian per hari.
Public DNS Server (Updated January 2013) :
|Provider||Primary DNS Server||Secondary DNS Server|
|Comodo Secure DNS||184.108.40.206||220.127.116.11|
 The DNS servers listed above as Level3 will automatically route to the nearest DNS server operated by Level3 Communications, the company that provides most of the ISPs in the US their access to the Internet backbone.
 Google also offers IPv6 public DNS servers: 2001:4860:4860::8888 and 2001:4860:4860::8844.
 Securly’s DNS servers block adult content by default, including of course X-rated content but also adult oriented pages on websites like Wikipedia, adult themed searches on Google, and more. The grown-ups in the house can sign up here to bypass all restrictions.
 The Norton ConnectSafe DNS servers listed above block sites hosting malware, phishing schemes, and scams. Use 18.104.22.168 and 22.214.171.124 to block those sites plus those with pornographic content. Use 126.96.36.199 and 188.8.131.52 to block all previously mentioned site categories plus those Norton deems “non-family friendly.”
 ScrubIT also offers “filtered” DNS servers that restrict access to pornographic and malicious web sites. Those DNS servers are 184.108.40.206 and 220.127.116.11 and you can read more about it here.
 The DNS servers listed here for OpenNIC are just two of many in the US and across the globe. Instead of using the OpenNIC DNS servers listed above, see their complete list of public DNS servers here and use two that are close to you. OpenNIC also offers some IPv6 public DNS servers.
 These Public-Root DNS servers are the only two currently operating in the United States but if you’re located ouside the US, see their complete list here and choose the best servers based on your location.