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Free & Public DNS Server List

自己在使用的public DNS (OpenDNS) <---主機在海外優先使用 (OpenDNS) (google) (google) (Hinet) <---主機在台灣優先使用 (Hinet)

ree & Public DNS Servers 

Updated List of Publicly Available and Completely Free DNS Servers 

By Tim Fisher
Most of the time, your ISP automatically assigns a primary and secondary DNS server when your router or computer requests network information via DHCP . But what if those ISP-provided DNS servers aren't reliable or you're troubleshooting an issue and you suspect that DNS might not be working properly?
Luckily there are several free DNS servers that you can use instead of the ones assigned to you. See How Do I Change DNS Servers? for help if you're not sure what to do.
Free & Public DNS Servers (Updated November 2013)
ProviderPrimary DNS ServerSecondary DNS Server
Level3 1209.244.0.3209.244.0.4
Securly 3184.169.143.224184.169.161.155
Comodo Secure DNS
OpenDNS Home 4208.67.222.222208.67.220.220
DNS Advantage
Norton ConnectSafe 5198.153.192.40198.153.194.40
GreenTeamDNS 681.218.119.11209.88.198.133
SafeDNS 7195.46.39.39195.46.39.40
OpenNIC 8216.87.84.21123.90.4.6
Public-Root 9199.5.157.131208.71.35.137
Dyn 1089.233.43.7189.104.194.142
Hurricane Electric 1174.82.42.42
puntCAT 12109.69.8.51
[1] 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.
[2] Google also offers IPv6 public DNS servers: 2001:4860:4860::8888 and 2001:4860:4860::8844.
[3] 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.
[4] OpenDNS also offers DNS servers that block adult content, called OpenDNS FamilyShield. It's also free but you do have to sign up here . A premium DNS offering is also available, called OpenDNS Home VIP.
[5] The Norton ConnectSafe DNS servers listed above block sites hosting malware, phishing schemes, and scams. Use and to block those sites plus those with pornographic content. Use and to block all previously mentioned site categories plus those Norton deems "non-family friendly."
[6] GreenTeamDNS "blocks 18 categories which include malware, botnets, dangerous websites, adult related content, aggressive/violent sites as well as advertisements and drug-related websites" according to their FAQ page . Premium accounts have more control.
[7] Register here with SafeDNS for content filtering options in several areas.
[8] 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 or, better yet, let them tell you that automatically here . OpenNIC also offers some IPv6 public DNS servers.
[9] 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.
[10] The DNS servers are uncensored, operated by a privately funded individual, and are physically located in Denmark. You can read more about them here . IPv6 DNS servers are also available at 2002:d596:2a92:1:71:53:: and 2002:5968:c28e::53
[11] Hurricane Electric also has an IPv6 public DNS server available: 2001:470:20::2.
[12] puntCAT is physically located near Barcelona, Spain. The IPv6 version of their DNS server is 2a00:1508:0:4::9.
Note: Primary DNS servers are sometimes called preferred DNS servers and secondary DNS servers are sometimes called alternate DNS servers. Primary and secondary DNS servers can be "mixed and matched" to provide another layer of redundancy.

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