Have you ever typed a website address correctly, but the website still refused to open?
Or maybe the website loads on your mobile data but not on your Wi-Fi connection?
In many cases, the real culprit is an outdated DNS cache stored on your device.
The DNS cache helps your system open websites faster by storing previous DNS lookup results locally. But sometimes, this saved data becomes outdated or corrupted. When this happens, your browser or operating system may try connecting to the wrong server address, leading to frustrating website issues.
Clearing the DNS cache is one of the easiest and most effective troubleshooting methods to fix website connectivity problems in 2026.
In this guide, you will learn:
- What DNS cache is
- What problems can an outdated DNS cache cause
- How to clear DNS cache on different operating systems
- Why each step matters
- Useful DNS tips to improve browsing experience
Also Read: How to Fix Slow DNS Lookup?
What is DNS Cache?
DNS (Domain Name System) converts the domain name into an IP address so your browser knows where to connect. To speed up future visits, your device temporarily stores this information. This stored information is called the DNS cache.
This improves browsing speed and reduces lookup time!
Also Read: Difference Between a Website, Domain Name and a URL
What Problems Can DNS Cache Cause?
While DNS cache is useful, old or corrupted cache files can create several issues.
1. Website Not Opening
Your system may still use an old IP address even after the website has moved to a new server.
2. DNS_PROBE_FINISHED_NXDOMAIN Errors
This error usually appears when the cached DNS records no longer match the current DNS configuration.
3. Website Loading Old Content
Sometimes you continue seeing outdated website data after DNS changes.
4. SSL or Security Errors
An incorrect cached IP may redirect your browser to the wrong server, triggering SSL certificate warnings.
5. Slow Website Connection
Your device may repeatedly attempt to connect to unreachable servers before finding the correct one.
★ Small Tip
Changing nameservers or DNS records can take time to update globally. Clearing the local DNS cache helps your system fetch the latest DNS information faster.
Also Read: Guide to Fix DNS_PROBE_FINISHED_NXDOMAIN?
When Should You Clear DNS Cache?
You should consider clearing the DNS cache when:
- Your website suddenly stops loading
- You recently changed DNS settings
- You migrated your domain to a new hosting server
- SSL errors appear unexpectedly
- You are troubleshooting internet connectivity issues
- You cannot access a website while others can
Also Read: How to Configure Domain Redirects in cPanel?
★ How Can You Clear the DNS Cache on Windows?
➢ Method 1: Using Command Prompt
- ➔ Search for ‘Command Prompt’ in Windows search.
- ➔ Right-click it and select ‘Run as Administrator’
➢ Why This Step Matters
Administrative access allows Windows to refresh and modify system-level DNS cache records.
➔ Now, you have to flush DNS. To flush DNS, run the following command & press Enter
| ipconfig /flushdns |
➢ What does this command do?
This command deletes all locally stored DNS cache entries from your system & after clearing the cache, Windows starts requesting fresh DNS information directly from DNS servers.
➔ If flushing gets successful, you will see:
| Successfully flushed the DNS Resolver Cache. |
That’s it! This confirms the old DNS records have been removed!
★ Small Tip
After flushing the DNS cache, restart your browser for better results.
★ How Can You Clear DNS Cache on macOS?
Different macOS versions may use slightly different commands, but the latest versions generally use the command below.
- ➔ Open Terminal
- ➔ In that, enter the following command to clear the DNS cache & press Enter
| sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder |
➢ What does this do?
macOS uses the mDNSResponder service to manage DNS caching & this command clears the stored cache and restarts the DNS responder service to fetch updated records.
➔ After entering this command, macOS may ask for your administrator password. You type it and press Enter.
★ Important Note
You may not see a confirmation message on macOS. That is normal and usually means the command worked successfully.
★ How Can You Clear DNS Cache on Linux?
- ➔ Open Terminal
- ➔ Run the Following Command
| sudo systemd-resolve –flush-caches |
➢ Why This Command is Used
Linux systems using systemd-resolved store DNS cache locally for faster access & this command removes outdated cached records and forces the system to retrieve fresh DNS data.
★ Small Tip
If flushing the cache does not work immediately, restarting the network manager can help fully refresh DNS connections.
Also Read: How to Configure DNS on Linux?
★ How Can You Clear Cache in Google Chrome
Sometimes the operating system cache is cleared, but the browser still stores DNS records.
- ➔ Open Google Chrome
- ➔ Visit the Following Address
| chrome://net-internals/#dns |
- ➔ Now, you have to click ‘Clear host cache’
➢ Why This Step Helps
Chrome maintains its own internal DNS cache for faster browsing. Clearing it ensures Chrome requests updated DNS records directly.
★ How Can You Clear DNS Cache on Android?
Android devices usually clear DNS cache automatically, but you can refresh it manually.
Method 1: Toggle Airplane Mode
- ➔ Enable Airplane Mode on your device & wait for 10–15 seconds.
- ➔ After that, disable Airplane Mode.
➢ Why This Works
This resets active network connections and forces the device to establish a fresh DNS lookup.
Method 2: Restart Your Device
A simple restart often refreshes temporary DNS-related network data.
★ How Can You Clear DNS Cache on iPhone (iOS)?
Method 1: Toggle Airplane Mode
- ➔ Enable Airplane Mode & wait for a few seconds
- ➔ Disable it again
Method 2: Restart the iPhone
Restarting refreshes network sessions and clears temporary DNS-related information.
Additional Tips to Avoid DNS Problems
➢ Use Reliable Public DNS Servers
Using trusted DNS providers can improve speed and reliability.
Popular options include:
- Google DNS
- Cloudflare DNS
- OpenDNS
➢ Keep Browser Updated
Modern browsers include better DNS handling and security improvements. So, it’s important to keep your browser updated.
➢ Avoid Storing Old DNS Records Too Long
If you manage websites or hosting, avoid excessively high DNS TTL values during migrations.
➢ Flush DNS After Website Migration
Whenever you move your website to a new server, clearing the DNS cache helps you see the updated site more quickly.
Also Read: How To Create a DNS Zone in WHM?
Conclusion
The DNS cache is designed to improve browsing speed, but outdated or corrupted records can cause frustrating website and connectivity issues.
Thankfully, clearing DNS cache is a quick and safe troubleshooting method that often fixes:
- Website loading problems
- DNS errors
- SSL warnings
- Slow website connections
- Server migration issues
Whether you use Windows, macOS, Linux, Android, or iPhone, flushing the DNS cache helps your device request fresh DNS information directly from DNS servers.
Whenever a website behaves strangely after DNS changes or server migration, clearing DNS cache should always be one of your first troubleshooting steps.
Frequently Asked Questions
1. Does Clearing DNS Cache Delete Personal Data?
Absolutely not! It only removes temporary DNS lookup records and does not affect files, passwords, or browsing history.
2. Is Clearing DNS Cache Safe?
Yes, for sure. It is completely safe and commonly recommended for fixing connectivity issues.
3. Will the Internet become faster after clearing the DNS Cache?
Sometimes yes! If outdated DNS records are slowing down website connections, clearing the cache can improve loading speed.
4. How Often Should I Clear DNS Cache?
You usually do not need to clear it regularly. Only do it when troubleshooting DNS or website-related issues.