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

Those are just my top choices. 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. For a lot of reasons, you might want to try alternative ones (more on this 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.

Best Free & Public DNS Servers (Valid September 2023)

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

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. It's what I use on my devices.

• Primary DNS: 8.8.8.8
• Secondary DNS: 8.8.4.4

There are also 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. In addition to traditional DNS over UDP/TCP, Google provides DNS over HTTPS (DoH) and TLS (DoT).

Control D: 76.76.2.0 & 76.76.10.0

Control D is unique in that it has several DNS servers to pick from, each categorized by theme. The "Uncensored" resolver proxies the commonly blocked websites in most countries to bypass IP blocking of various news websites. Others can be used to stop malicious websites, block ads and trackers, or block social networks or adult content. The basic option, "Unfiltered," provides DNS query privacy and security:

• Primary DNS: 76.76.2.0
• Secondary DNS: 76.76.10.0

IPv6 is supported, too:

• Primary DNS: 2606:1a40::
• Secondary DNS: 2606:1a40:1::

Something unique about Control D that I love to see is the custom configurations. For example, I could join trackers and ads, malware, phishing, and government sites to make a custom filter to block all of that content. Premium filters are available for a low cost that can block things like crypto exchanges and VPNs. Control D also supports DoH and DoT.

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. One thing I appreciated while researching this company is that it works without storing your personal data; their website clearly states that when you use Quad9, "no data containing your IP address is ever logged."

• 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 doesn't filter content—only domains that are phishing or contain malware will be blocked. There's also has an unsecured IPv4 public DNS (i.e., no malware blocking) at 9.9.9.10 (2620:fe::10 for IPv6). Quad9 also supports DoH.

OpenDNS: 208.67.222.222 & 208.67.220.220

OpenDNS claims 100 percent reliability and uptime (since 2006!), and is used by tens of millions of users around the world. They 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 like to block or redirect websites. I did this for years (coupled with a DDNS service) and was very pleased with how it worked.

The company also offers DNS servers that you can set up to block adult content, called OpenDNS FamilyShield: 208.67.222.123 and 208.67.220.123. Those two also support DNS over HTTPS. 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 "internet’s fastest DNS directory" (here's how DNSPerf ranks them). I like them for the privacy commitment—they 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 are setup directions for all your devices through the link above. Another way to use it is through the 1.1.1.1 app, which provides quick DNS setup on mobile and desktop devices; it also doubles as a VPN. 1.1.1.1 for Families can block malware (1.1.1.2) or malware and adult content (1.1.1.3). It supports DNS over HTTPS and TLS as well.

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. They both also block the same domains supported by the security filter. For more features, subscribe to a CleanBrowsing's premium plans. This service supports DoH and DoT as well.

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. It works pretty well in my experience, but it's not 100 percent perfect.

• Primary DNS: 76.76.19.19
• Secondary DNS: 76.223.122.150

Alternate DNS has IPv6 DNS servers, too:

• Primary DNS: 2602:fcbc::ad
• Secondary DNS: 2602:fcbc:2::ad

You can sign up with Alternate DNS for free. There's also a Family Premium DNS option that blocks adult content.

AdGuard DNS: 94.140.14.14 & 94.140.15.15

AdGuard DNS has two sets of DNS servers that block ads in games, videos, apps, and web pages. I used these "Default" servers for several months to block ads and trackers, and I was pleased with its performance, despite ads slipping through at times:

• 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. These servers are also available as DNS over HTTPS, TLS, and QUIC, as well as DNSCrypt. Compared to paid AdGuard DNS plans, free users have zero customer support and limited monthly requests, device access, and servers.

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. If your existing DNS servers are really bad, you might find that you can even double your internet speed by just changing these servers.

Other common reasons to use DNS servers from a third party is to prevent logging of your web activity so that you can have a more private browsing experience, 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 for access—DNS servers just translate between IP addresses and domain names so that you can access websites with a human-readable name (like lifewire.com) instead of a difficult-to-remember IP address.

Additional DNS Servers

Here are several more public DNS servers from major providers:

Verizon DNS Servers & Other ISP Specific DNS Servers

Verizon DNS servers are often listed elsewhere as 4.2.2.1, 4.2.2.2, 4.2.2.3, 4.2.2.4, and/or 4.2.2.5, but those are actually alternatives to the CenturyLink/Level 3 DNS server addresses shown in the table above.

Verizon, like most ISPs, prefers to balance their DNS server traffic via local, automatic assignments. For example, the primary Verizon DNS server in Atlanta, GA, is 68.238.120.12 and in Chicago, is 68.238.0.12.

Frequently Asked Questions

• How do I change my DNS server? You can specify a DNS server in the settings for your router. Specific instructions will differ depending on the model, but generally, you'll log in to the hardware by entering http://192.168.1.1 and then entering one of the addresses above into the DNS settings.
• How do I fix a DNS server that isn't responding? Your computer may fail to connect to a DNS for several reasons. To fix a faulty DNS connection, check your ISP's connection status and your antivirus software, and run any network troubleshooting software your computer has. If none of this works, restart or reset your modem and router.