DNS in Android: what is it, how does it work and why change it

Have you ever Have you ever wondered why your smartphone finds sites in the browser so quickly or why some applications work faster on Wi-Fi than on the mobile data? Behind this is the system Android finds sites so quickly in the browser or why do some applications work faster on Wi-Fi than on the mobile data? There's a system behind it DNS —an invisible but critical mechanism that converts addresses that we understand (for example, google.com) into numeric IP addresses that devices understand. Without DNS, the Internet on your phone simply would not work the way we are used to.

Many users do not even suspect that DNS settings on Android can (and sometimes need to!) be changed manually. By default, your phone uses the DNS servers provided by your mobile operator or Wi-Fi provider. But what if these servers are slow, blocking access to some sites, or even collecting data about your requests? In this article we will look at security and access to content, and also show how to set it up on any smartphone DNS affects Internet speed, security and access to content, and we’ll also show you how to set it up on any smartphone Android from Samsung Galaxy to Xiaomi Redmi.

You will find out which public DNS servers It is better to use it for various tasks (for example, to bypass blocks or protect against phishing), how to check the current settings and what to do if the Internet stops working after changing the DNS. We'll also reveal a few little-known tricks that will help optimize the network on your device.

What is DNS and how does it work on Android

DNS (Domain Name System) is a kind of “phone book” of the Internet. When you enter a website address into your browser (for example, youtube.com), your phone sends a request to the DNS server asking: "What is the IP address of this domain?" The server returns a numeric address (for example, 142.250.186.46), and only after that can your device establish a connection to the desired resource.

On Android this process occurs automatically and unnoticed by the user. However, there are a few key points:

• 🔄 DNS caching: Your phone stores DNS responses for a while to avoid sending repeated queries. This speeds up the loading of frequently visited sites.
• 📡 DNS source: by default, the server of your operator (for mobile data) or provider (for Wi-Fi) is used. But it can be replaced with any other.
• 🛡️ Security: some DNS servers filter malicious sites or block advertising at the domain resolution stage.

Interestingly, support has appeared on Android 9 (Pie) and newer DNS-over-TLS (DoT) - a protocol that encrypts DNS requests. This protects your data from being intercepted, for example on public Wi-Fi networks. However, not all applications and servers support this function.

Why do operators use their DNS servers?

Mobile operators and Internet providers often configure their DNS servers to:

1) Speeding up access to popular resources (caching on your side),

2) Blocking access to prohibited sites (by law or internal policy),

3) Collecting statistics about resources visited by users (sometimes anonymously, sometimes not).

Why change DNS on Android: 5 real reasons

Most users never think about changing DNS, but there are situations where this can significantly improve the performance of the phone:

1. Speed ​​up loading sites. Some public DNS (for example, Cloudflare or Google) work faster than operator servers, especially if you are in another country. Speed ​​up loading sites. If an operator or provider blocks access to certain sites (for example, by court order), changing the DNS can help bypass these restrictions. 1.1.1.1 from Cloudflare or 8.8.8.8 from Google) work faster than operator servers, especially if you are in another country.
2. Bypassing blocking. If an operator or provider blocks access to certain sites (for example, by court order), changing the DNS can help bypass these restrictions.
3. Protection against phishing and viruses. Servers like 9.9.9.9 (Quad9) automatically block access to known malicious domains.
4. Hide activity. Some DNS servers (for example, NextDNS) do not keep request logs, which increases confidentiality.
5. Solving connection problems. Sometimes a failure of the operator's DNS server results in sites not opening, although there is Internet access. Changing DNS can restore access.

Important: changing DNS will not make your Internet anonymous - this requires a VPN or Tor. However, this will reduce the risk of data leakage about visited sites through unprotected DNS queries.

How to check the current DNS settings on Android

Before changing DNS, it is useful to find out which servers are currently in use. There are several ways:

Method 1: Through Wi-Fi settings

If you are connected to Wi-Fi, go to: Settings → Network and Internet → Wi-Fi

Click on the name of your network → Change network → Advanced settings. Here you will see a field IP settings (usually "DHCP") and possibly the current DNS addresses (if they were set manually).

Method 2: Through applications

Install one of these applications from Google Play:

• 🔍 DNS Checker - shows the current DNS and ping to them.
• 📊 Network Analyzer - provides complete information about the network, including DNS.
• 🛡️ 1.1.1.1: Faster Internet (from Cloudflare) - not only checks, but also offers optimal settings.

Method 3: Through the terminal (for advanced)

If you have a terminal application (for example, Termux), run the command:

getprop | grep dns

This will show the current system DNS servers. To check active connections, you can use:

netstat -rn

Step-by-step guide: how to change DNS on Android

The process of changing DNS depends on the version Android and the phone manufacturer. We will consider a universal method that works on most devices (including Samsung, Xiaomi, Huawei, Google Pixel etc.).

For a Wi-Fi network:

1. Open Settings → Network and Internet → Wi-Fi.
2. Tap on the name of your network (or hold its name if you need to change the saved network).
3. Select Change network → Advanced settings (or IP settings).
4. In field IP Settings select Static (instead of DHCP).
5. Scroll down to fields DNS 1 i DNS 2. Enter the addresses of the required servers (for example, 1.1.1.1 and 1.0.0.1 for Cloudflare).
6. Save the changes and reconnect to the network.

For mobile data (3G/4G/5G):

Unfortunately, on most phones Android it is not possible to change the DNS for mobile data through the standard settings. However, there are workarounds:

• 📱 Use applications like DNS Changer or 1.1.1.1that create a local VPN to redirect DNS requests.
• 🔧 On phones with root access, you can edit file or use modules necessary|Check if your router supports manual DNS settings (sometimes it’s easier to change them there)|Disable VPN before changing settings to avoid conflicts--> /system/etc/resolv.conf or use modules Magisk.
• 🌐 Some firmware (for example, LineageOS) allow you to change DNS globally.

Make sure you have backup DNS addresses in case of failure|Write down your current settings so you can revert them if needed|Check if your router supports manual DNS settings (sometimes it's easier to change them there)|Turn off your VPN before changing settings to avoid conflicts-->

Popular DNS servers and their features

DNS server	Addresses (IPv4)	Features	DoT supported?
Cloudflare	1.1.1.1, 1.0.0.1	The fastest, does not keep logs (according to the company)	Yes
Google Public DNS	8.8.8.8, 8.8.4.4	Reliable, but collects data for analysis	Yes
Quad9	9.9.9.9, 149.112.112.112	Blocks malicious sites, does not sell data	Yes
OpenDNS	208.67.222.222, 208.67.220.220	Content filtering (can be configured)	No
AdGuard DNS	94.140.14.14, 94.140.15.15	Blocks ads and trackers at level DNS	Yes

Frequent problems after changing DNS and their solutions

Sometimes after changing DNS, the Internet stops working or is unstable. Here are the most common problems and ways to fix them:

1. Sites do not open, although the Internet is available

This may mean that:

• ❌ The DNS server IP address entered is incorrect (check for typos).
• ⏳ The DNS server is temporarily unavailable (try another one, for example 8.8.8.8).
• 🔒 Some operators block third-party DNS (the solution is to use applications like 1.1.1.1 with VPN mode).

2. Slow page loading

If after changing the DNS, sites take longer to load:

• 📶 Check your DNS speed using DNS Benchmark (testing application).
• 🌍 Try a server that is geographically closer to you (for example, European addresses for users in Russia).
• 🔄 Go back to automatic settings and compare the speed.

3. work (for example, banking)

Some applications (especially banking) may block operation when using third-party DNS due to security policies. Solutions:

• 🏦 Add your bank's DNS to the exceptions (if you use NextDNS or analogues).
• 🔙 Temporarily return standard DNS settings for working with the application.
• 📱 Check whether the application is blocked by VPN (some DNS applications create a VPN connection).

DNS-over-TLS (DoT) and DNS-over-HTTPS (DoH): what they are and how to enable

Regular DNS requests are sent in the clear, which allows providers, hackers, or even public Wi-Fi owners to see which sites you visit. To protect this data, protocols DNS-over-TLS (DoT) and DNS-over-HTTPS (DoH)have been developed that encrypt requests.

A Android 9 and newer have built-in support for DoT. To enable it:

1. Go to Settings → Network and Internet → Private DNS.
2. Select Private DNS Provider Hostname.
3. Enter the supporting address DoT server, for example:
   • 1dot1dot1dot1.cloudflare-dns.com (Cloudflare)
   • dns.google (Google)
   • dns.quad9.net (Quad9)

Save the settings.

If you have an older version Android, you can use applications:

• 🔒 1.1.1.1 (Cloudflare) - supports DoH and DoT.
• 🛡️ NextDNS - allows you to configure content filtering + encryption.
• 🌐 Intra (from Jigsaw) - encrypts DNS requests via DoH.

How is DoT different from DoH?

DoT (DNS-over-TLS) uses a separate encrypted channel on port 853, which requires support at the OS or application level. DoH (DNS-over-HTTPS) masks DNS requests as normal HTTPS traffic on port 443, which is more difficult to block, but may conflict with some corporate networks.

DNS and parental controls: how to restrict access to content

If you want to limit access to certain sites on your child’s phone or on your device, change DNS can be a simple solution. Some DNS servers offer built-in content filtering:

• 👶 Cloudflare Family:
  • Addresses: 1.1.1.3 (blocking malicious and adult sites)
  • 1.1.1.2 (blocking malicious sites only)
• 🏡 OpenDNS FamilyShield:
  • Addresses: 208.67.222.123, 208.67.220.123
  • Blocks porn, gambling and social networks (flexible settings).
• 🔒 CleanBrowsing:
  • Addresses: 185.228.168.168 (family filter)
  • Supports setting up "white lists" to unblock individual sites.

To set up such a DNS on your child's phone:

1. Change the DNS settings in Wi-Fi (as described above) using the filtering server addresses.
2. For mobile data, install the application 1.1.1.1 and select the "Family" mode.
3. Check the blocking by trying to open a prohibited site (for example, exampleadultsite.com).

FAQ: Frequently asked questions about DNS on Android

Is it possible to break your phone if you change the DNS incorrectly?

No, changing DNS cannot physically damage the phone. In the worst case, the Internet will stop working, but you can always return the settings to the original ones (select "Automatic" or "DHCP").

Which DNS is the fastest for Russia/Ukraine/Kazakhstan?

The speed depends on your location and provider. To check, use the application DNS Benchmark. Usually they work well:

• Cloudflare (1.1.1.1) - optimized for global use.
• Yandex DNS (77.88.8.8) - fast for CIS countries, but keeps logs.
• Google DNS (8.8.8.8) - stable, but may be slower in some regions.

Why, after changing the DNS, some sites open and some do not?

This can happen for several reasons:

• The DNS server blocks access to certain sites (for example, Quad9 blocks malicious domains).
• The site uses DNS-based blocking (for example, some services check where the request is coming from).
• Problems with IPv6: if the site is accessible only via IPv6, and your DNS does not support this protocol.

Solution: try another DNS server or check the site via ping v terminal.

Is it possible to use DNS to unblock Netflix or other streaming services?

Previously, changing DNS often helped to bypass geo-restrictions (for example, for viewing Netflix USA), but now most streaming services block such methods. They determine your location not only by DNS, but also by the IP address issued by your ISP. To reliably bypass geo-blocking you need VPN.

How to return the default DNS settings if I broke something?

Returning everything back is very simple:

1. For Wi-Fi: go to network settings → select DHCP (automatically) instead Static.
2. For mobile data: remove applications for changing DNS (for example, 1.1.1.1) or disable VPN.
3. For DoT: in settings Private DNS select Automatic.

After that, restart your phone for the changes to take effect.

Conclusion: is it worth changing DNS on Android?

Changing DNS to Android is a simple but effective way to improve Internet speed, bypass some blocks and increase privacy. However, this is not a universal solution:

• ✅ It's worth a tryif:
  • The Internet is slow and sites take a long time to load.
  • You want to protect your data on public Wi-Fi.
  • You need to bypass blocking of individual sites.
• ❌ Doesn't helpif:
  • The problem is a weak mobile network signal (DNS is not helpful here) what).
  • You want to completely hide your activity (you need a VPN).
  • Blocking is implemented at the IP level (not DNS).

Start by testing popular DNS servers (Cloudflare, Google, Quad9) and choose the one that works best in your region. If you use mobile data, pay attention to applications like 1.1.1.1 —they simplify setup and add encryption.

Remember: DNS is only one element of the network. For maximum speed and security, combine it with other tools: VPN for anonymity, adblocks for filtering ads and regularly checking your device for viruses.