The ERR_NAME_NOT_RESOLVED error on Android is a common network-related issue indicating that the system cannot translate a website's domain name into its corresponding IP address. In the technical framework of the internet, every website address like "google.com" serves as a human-readable alias for a numerical IP address. The Domain Name System (DNS) functions as the directory for these addresses. When an Android device displays this specific error, it means the lookup process has failed, preventing the browser or application from establishing a connection to the host server.

This failure typically stems from corrupted browser cache, incorrect network configurations, unstable DNS server responses from the Internet Service Provider (ISP), or interference from third-party security software. Resolving this requires a systematic approach, moving from simple interface toggles to advanced system-level modifications.

Understanding the DNS Lookup Process on Android

To effectively troubleshoot ERR_NAME_NOT_RESOLVED, it is essential to understand how an Android device attempts to resolve a name. When a URL is entered into a browser like Chrome, the following sequence occurs:

  1. Browser Cache Check: The browser first looks at its internal DNS cache to see if it recently resolved the domain.
  2. System Cache Check: If not found, the Android operating system checks its own local DNS cache.
  3. Hosts File (Rooted Devices): For devices with administrative access, the system checks the internal hosts file for manual overrides.
  4. DNS Query: The device sends a request to the configured DNS server (usually provided by the Wi-Fi router or the mobile carrier).
  5. Recursive Resolution: The DNS server searches the global registry to find the IP.

If any link in this chain is broken—whether due to a stale record in the cache or a non-responsive server—the ERR_NAME_NOT_RESOLVED message appears.

Initial Troubleshooting and Quick Fixes

Before diving into complex system settings, several immediate actions can resolve temporary glitches that cause DNS resolution failures.

Verify the Network Environment

The first step is to isolate whether the problem is specific to a single network or the device itself.

  • Switch to Mobile Data: If the error occurs while on Wi-Fi, disable Wi-Fi and attempt to load the page using cellular data. If it works, the issue resides with the Wi-Fi router or the ISP's DNS settings.
  • Restart the Router: Home routers often accumulate "zombie" processes or suffer from DNS forwarder hangs. Unplugging the router for at least 30 seconds clears its volatile memory and forces a fresh handshake with the ISP.
  • Toggle Airplane Mode: This action resets the radio stacks (Wi-Fi, Bluetooth, and Cellular) without a full reboot. Wait ten seconds after enabling it before turning it back off to allow the network controller to re-register.

Perform a Full Device Restart

A standard restart clears temporary system files and refreshes the Android network manager. This is particularly effective if the device has been running for hundreds of hours without a reboot, as background network processes can occasionally enter a deadlocked state.

Browser-Level Solutions in Google Chrome

Since most users encounter this error within the Chrome browser, managing the browser's specific network handling features is a high-priority solution.

Clear Chrome Browser Cache and Data

Stored cookies and cached files can sometimes contain outdated DNS information that conflicts with the current IP of a website.

  1. Open Chrome and tap the three-dot menu icon in the upper right corner.
  2. Navigate to Settings > Privacy and security.
  3. Select Clear browsing data.
  4. Set the time range to All time.
  5. Check Cookies and site data and Cached images and files.
  6. Tap Clear data.

Note: This process may sign you out of most websites, but it ensures that no stale data is interfering with the DNS lookup.

Disable DNS Preloading

Chrome uses a feature called "Preload pages" to speed up browsing by resolving DNS and loading links it predicts the user will click. If the preloaded data is incorrect, it triggers the ERR_NAME_NOT_RESOLVED error.

  1. Go to Chrome Settings > Privacy and security.
  2. Tap on Preload pages.
  3. Select No preloading.
  4. Restart the browser and attempt to access the target website again.

Flush DNS via Chrome Internals

For a more surgical approach, Chrome has a hidden internal interface for network management.

  1. Type chrome://net-internals/#dns into the Chrome address bar.
  2. If the page opens, look for a button labeled Clear host cache and tap it.
  3. Next, navigate to the Sockets tab in the same internal menu.
  4. Tap Close idle sockets and Flush socket pools.
  5. These actions force the browser to drop all existing network connections and start fresh name resolutions.

Configuring Advanced DNS Settings

If local cache clearing fails, the issue likely lies with the DNS server assigned to the device. By default, Android uses DNS servers provided by the ISP, which are often slower and less reliable than public alternatives.

Utilizing Private DNS (Android 9 and Newer)

Modern Android versions include a "Private DNS" feature that uses DNS-over-TLS (DoT) to provide encrypted and reliable lookups.

  1. Open the device Settings.
  2. Navigate to Network & internet (or Connections on some devices).
  3. Tap Private DNS.
  4. Select Private DNS provider hostname.
  5. Enter one of the following reliable hostnames:
    • dns.google (Google’s Public DNS)
    • 1dot1dot1dot1.cloudflare-dns.com (Cloudflare’s DNS)
  6. Tap Save.

If the error was caused by an ISP-level outage or censorship, the website should load immediately after these changes. If the network suddenly stops working entirely after this change, it means the current network blocks Port 853 (used for DoT), and you should revert to "Automatic."

Manually Setting Static IP and DNS for Wi-Fi

On older Android versions or specifically problematic Wi-Fi networks, setting a static IP allows for manual DNS entry.

  1. Go to Settings > Wi-Fi.
  2. Long-press your connected network and select Modify network or View network settings.
  3. Expand the Advanced options.
  4. Change IP settings from DHCP to Static.
  5. Keep the IP address and Gateway as they are, but change:
    • DNS 1: 8.8.8.8
    • DNS 2: 8.8.4.4
  6. Save the settings.

Resolving System-Level Conflicts

Sometimes the error is not in the browser or the DNS server, but in the Android system's core configuration or environment.

Synchronize Date and Time

DNS resolution and the subsequent HTTPS handshakes rely heavily on accurate timestamps. If the device's clock is significantly out of sync with the server's clock, the security certificate validation fails, which can manifest as a name resolution error.

  1. Go to Settings > System > Date & time.
  2. Ensure Set time automatically and Set time zone automatically are both toggled ON.
  3. If they were already on, toggle them off and back on to force a re-sync with the network time protocol (NTP) servers.

Reset Network Settings

This is a powerful step that restores all network-related configurations to their factory defaults. It will delete saved Wi-Fi passwords and paired Bluetooth devices.

  1. Navigate to Settings > System > Reset options.
  2. Tap Reset Wi-Fi, mobile & Bluetooth (or Reset network settings).
  3. Confirm the action.
  4. Reconnect to your Wi-Fi and test the connection.

Clear System Cache Partition (Recovery Mode)

For persistent errors that survive a network reset, clearing the system cache partition can remove corrupted files that the standard OS interface cannot reach. This does not delete personal data.

  1. Power off the device.
  2. Hold the Volume Up and Power buttons simultaneously until the recovery logo appears (this combination varies by manufacturer; some use Volume Down).
  3. Use the volume buttons to navigate to Wipe cache partition.
  4. Press the power button to select it.
  5. Once finished, select Reboot system now.

Identifying External Interference

Third-party applications and security features can inadvertently block the DNS lookup path.

Disable VPN and Proxy Services

VPNs and Proxies intercept all outgoing network traffic, including DNS queries. If the VPN server's DNS is down, your Android device will return ERR_NAME_NOT_RESOLVED.

  1. Open your VPN app and disconnect.
  2. Go to Settings > Network & internet > VPN and ensure no "Always-on VPN" is active.
  3. Check browser settings for any active proxy configurations and disable them.

Audit Ad-Blockers and Security Suites

Apps like AdGuard or specialized firewalls often use a local VPN loopback to filter DNS requests and block ad-serving domains. If the filter list is corrupted or the app's internal DNS resolver fails, it can block legitimate traffic. Temporarily disable these apps to see if the error persists.

Check Data Saver Mode

When Data Saver is active, it restricts background data usage. While this rarely blocks DNS entirely, it can cause timeouts during the resolution process if the network signal is weak. Try disabling Data Saver in Settings > Network & internet > Data Saver.

Summary of Fixes for ERR_NAME_NOT_RESOLVED

The process of fixing this error involves a logical progression through the network stack.

Level Action Primary Goal
Network Switch to Mobile Data / Restart Router Rule out ISP or hardware issues.
Browser Clear Chrome Cache / Flush DNS Internals Remove stale domain-to-IP records.
Configuration Enable Private DNS (dns.google) Bypass unreliable ISP DNS servers.
System Sync Date/Time / Reset Network Settings Fix core OS communication protocols.
Apps Disable VPN / Ad-blockers Remove third-party interference.

In most scenarios, clearing the Chrome cache or switching to Google's Private DNS solves the problem. If the error occurs only on one specific website across multiple devices and networks, the issue likely resides on the website's server-side DNS configuration, and no amount of device-side troubleshooting will resolve it until the webmaster updates their DNS records.

Frequently Asked Questions

What is the most common cause of ERR_NAME_NOT_RESOLVED on Android?

The most frequent cause is a combination of stale DNS cache in the Chrome browser and unstable DNS resolvers provided by the mobile carrier or local Wi-Fi provider.

Does "Reset Network Settings" delete my photos?

No. Resetting network settings only clears Wi-Fi passwords, Bluetooth pairings, and VPN configurations. It does not affect your photos, apps, or personal files.

Why does this error only happen on Wi-Fi and not mobile data?

This indicates that your Wi-Fi router's DNS settings or your ISP's DNS servers are unable to resolve the specific domain. Using the "Private DNS" feature in Android settings is the best way to bypass this.

Can a virus cause this error?

While rare, certain types of malware can alter the device's DNS settings or the hosts file to redirect traffic. If the redirection server is down, you will see this error. Running a scan with Google Play Protect is recommended if the error persists after all other fixes.

Why do I see this error on a new Android phone?

For new devices, the most common reason is an incorrect date and time setting during the initial setup, which prevents secure DNS lookups from completing correctly. Check your time settings first.