The best free public DNS servers include Google, Quad9, OpenDNS, Cloudflare, CleanBrowsing, Alternate DNS, and AdGuard DNS.

Here’s a quick reference if you know what you’re doing, but we get into these services a lot more later in this article:

Best Free & Public DNS Servers
Provider	Primary DNS	Secondary DNS
Google	8.8.8.8	8.8.4.4
Quad9	9.9.9.9	149.112.112.112
OpenDNS Home	208.67.222.222	208.67.220.220
Cloudflare	1.1.1.1	1.0.0.1
CleanBrowsing	185.228.168.9	185.228.169.9
Alternate DNS	76.76.19.19	76.223.122.150
AdGuard DNS	94.140.14.14	94.140.15.15

A list of additional free DNS servers can be found in the table near the bottom of the page.

What Are DNS Servers?

DNS servers translate the friendly domain name you enter into a browser (like lifewire.com) into the public IP address that’s needed for your device to actually communicate with that site.

Your ISP automatically assigns DNS servers when your smartphone or router connects to the internet but you don’t have to use those. There are lots of reasons you might want to try alternative ones (we get into many of them in Why Use Different DNS Servers? a bit further down the page) but privacy and speed are two big wins you could see from switching.

Primary DNS servers are sometimes called preferred DNS servers and secondary DNS servers sometimes alternate DNS servers. Primary and secondary DNS servers can be “mixed and matched” from different providers to protect you if the primary provider has problems.

Best Free & Public DNS Servers (Valid March 2021)

Below are more details on the best free DNS servers you can use instead of the ones assigned.

If you’re not sure, use the IPv4 DNS servers listed for a provider. These are the IP addresses that include periods. IPv6 IP addresses use colons.

GOOGLE: 8.8.8.8 & 8.8.4.4 

Google Public DNS promises three core benefits: a faster browsing experience, improved security, and accurate results without redirects.

• Primary DNS: 8.8.8.8
• Secondary DNS: 8.8.4.4

Google also offers IPv6 versions:

• Primary DNS: 2001:4860:4860::8888
• Secondary DNS: 2001:4860:4860::8844

Google can achieve fast speeds with its public DNS servers because they’re hosted in data centers all around the world, meaning that when you attempt to access a web page using the IP addresses above, you’re directed to a server that’s nearest to you.

QUAD9: 9.9.9.9 & 149.112.112.112

Quad9 has free public DNS servers that protect your computer and other devices from cyber threats by immediately and automatically blocking access to unsafe websites, without storing your personal data.

• Primary DNS: 9.9.9.9
• Secondary DNS: 149.112.112.112

There are also Quad 9 IPv6 DNS servers:

• Primary DNS: 2620:fe::fe
• Secondary DNS: 2620:fe::9

Quad9 does not filter content—only domains that are phishing or contain malware will be blocked. Quad9 also has an unsecured IPv4 public DNS at 9.9.9.10 (2620:fe::10 for IPv6).

OPENDNS: 208.67.222.222 & 208.67.220.220

OpenDNS claims 100% reliability and up-time and is used by 90 million users around the world. The offer two sets of free public DNS servers, one of which is just for parental controls with dozens of filtering options.

• Primary DNS: 208.67.222.222
• Secondary DNS: 208.67.220.220

IPv6 addresses are also available:

• Primary DNS: 2620:119:35::35
• Secondary DNS: 2620:119:53::53

The servers above are for OpenDNS Home, which you can make a user account for to set up custom settings. The company also offers DNS servers that block adult content, called OpenDNS FamilyShield: 208.67.222.123 and 208.67.220.123 (shown here). A premium DNS offering is available, too, called OpenDNS VIP.

CLOUDFLARE: 1.1.1.1 & 1.0.0.1

Cloudflare built 1.1.1.1 to be the “fastest DNS service in the world” and will never log your IP address, never sell your data, and never use your data to target ads. 

• Primary DNS: 1.1.1.1
• Secondary DNS: 1.0.0.1

They also have IPv6 public DNS servers:

• Primary DNS: 2606:4700:4700::1111
• Secondary DNS: 2606:4700:4700::1001

There’s a 1.1.1.1 app for Android here and iOS here, for quick setup on mobile devices.

CLEANBROWSING: 185.228.168.9 & 185.228.169.9

CleanBrowsing has three free public DNS server options: a security filter, adult filter, and family filter. These are the DNS servers for the security filter, the most basic of the three that updates hourly to block malware and phishing sites:

• Primary DNS: 185.228.168.9
• Secondary DNS: 185.228.169.9

IPv6 is also supported:

• Primary DNS: 2a0d:2a00:1::2
• Secondary DNS: 2a0d:2a00:2::2

The CleanBrowsing adult filter (185.228.168.10) prevents access to adult domains, and the family filter (185.228.168.168) blocks proxies, VPNs, and mixed adult content. More features can be had at a price: CleanBrowsing Plans.

ALTERNATE DNS: 76.76.19.19 & 76.223.122.150

Alternate DNS is a free public DNS service that blocks ads before they reach your network.

• Primary DNS: 76.76.19.19
• Secondary DNS: 76.223.122.150

Alternate DNS has IPv6 DNS servers, too:

• Primary DNS: 2001:4801:7825:103:be76:4eff:fe10:2e49
• Secondary DNS: 2001:4800:780e:510:a8cf:392e:ff04:8982

You can sign up for free from their signup page. There’s also a Family Premium DNS option for $2.99 /month that blocks adult content.

ADGUARD DNS: 94.140.14.14 & 94.140.15.15

AdGuard DNS has two sets of DNS servers, both of which block ads in games, videos, apps, and web pages. The basic set of DNS servers are called the “Default” servers, and block not only ads but also malware and phishing websites:

• Primary DNS: 94.140.14.14
• Secondary DNS: 94.140.15.15

IPv6 is supported, too:

• Primary DNS: 2a10:50c0::ad1:ff
• Secondary DNS: 2a10:50c0::ad2:ff

There are also “Family protection” servers (94.140.14.15 and 2a10:50c0::bad1:ff) that block adult content plus everything included in the “Default” servers. Non-filtering servers are available if you’re not interested in blocking anything: 94.140.14.140 and 2a10:50c0::1:ff.

Why Use Different DNS Servers?

One reason you might want to change the DNS servers assigned by your ISP is if you suspect there’s a problem with the ones you’re using now. An easy way to test for a DNS server issue is by typing a website’s IP address into the browser. If you can reach the website with the IP address, but not the name, then the DNS server is likely having issues.

Another reason to change DNS servers is if you’re looking for better performing service. Many people complain that their ISP-maintained DNS servers are sluggish and contribute to a slower overall browsing experience.

Yet another common reason to use DNS servers from a third party is to prevent logging of your web activity and to circumvent the blocking of certain websites.

Know, however, that not all DNS servers avoid traffic logging. If that’s what you’re interested in, make sure you read through the FAQs on the DNS provider’s site to make sure it’s going to do (or not do) what you’re after.

If, on the other hand, you want to use the DNS servers that your specific ISP, like Verizon, AT&T, Comcast/XFINITY, etc., has determined is best, then don’t manually set DNS server addresses at all—just let them auto assign.

Finally, in case there was any confusion, free DNS servers do not give you free internet access. You still need an ISP to connect to for access—DNS servers just translate between IP addresses and domain names so that you can access websites with a human-readable name instead of a difficult-to-remember IP address.

Additional DNS Servers

Here are several more public DNS servers. Let us know if we’re missing any major providers.

OpenNIC has several DNS servers. Visit its website and select one that’s geographically nearby for the optimal performance.

More Free DNS Servers
Provider	Primary DNS	Secondary DNS
DNS.WATCH	84.200.69.80	84.200.70.40
Comodo Secure DNS	8.26.56.26	8.20.247.20
CenturyLink (Level3)	205.171.3.66	205.171.202.166
SafeDNS	195.46.39.39	195.46.39.40
OpenNIC	192.71.245.208	94.247.43.254
Dyn	216.146.35.35	216.146.36.36
FreeDNS	45.33.97.5	37.235.1.177
Yandex.DNS	77.88.8.8	77.88.8.1
UncensoredDNS	91.239.100.100	89.233.43.71
Hurricane Electric	74.82.42.42
puntCAT	109.69.8.51
Neustar	64.6.64.6	64.6.65.6
Fourth Estate	45.77.165.194	45.32.36.36

DNS servers are referred to as all sorts of names, like DNS server addresses, internet DNS servers, internet servers, DNS IP addresses, etc.