How Do I Fix a Slow DNS Server?


Heather Bennett

Are you frustrated with a slow DNS server? Don’t worry, you’re not alone.

A sluggish DNS server can be a major hindrance to your browsing experience. But fear not, because in this article, we will walk you through the steps to fix a slow DNS server.

What is DNS?

DNS stands for Domain Name System. It is the technology that translates human-readable domain names, like, into IP addresses, such as Without DNS, browsing the internet would be a lot more complicated as we would have to remember and type in IP addresses instead of convenient domain names.

Why is my DNS server slow?

There can be various reasons why your DNS server might be running slow:

  • Network congestion: If there’s heavy traffic on your network, it can cause delays in resolving domain names.
  • DNS caching issues: Your computer or router may have outdated or incorrect entries cached, leading to slower resolution times.
  • Slow ISP DNS servers: Your Internet Service Provider’s (ISP) DNS servers may not be optimized for speed and efficiency.

How to fix a slow DNS server

1. Change your DNS server

If you’re experiencing consistent slowness with your current DNS provider, consider switching to a faster and more reliable one like Google Public DNS or Cloudflare DNS. Here’s how:

  1. Windows:
    • Open the Control Panel and navigate to “Network and Internet” -> “Network and Sharing Center”.
    • Click on “Change adapter settings” in the left-hand menu.
    • Right-click on your active network connection and select “Properties”.
    • Select “Internet Protocol Version 4 (TCP/IPv4)” and click on “Properties”.
    • Choose the option to “Use the following DNS server addresses” and enter the new DNS server addresses.
  2. Mac:
    • Go to “System Preferences” -> “Network”.
    • Select your active network connection and click on “Advanced”.
    • Navigate to the “DNS” tab.
    • Click on the “+” button to add a new DNS server and enter the desired DNS addresses.

    Remember to note down your original DNS settings before making any changes so that you can revert if needed.

    2. Clear DNS cache

    If your computer or router is storing outdated or incorrect DNS information, clearing the cache can help improve performance. Here’s how:

    1. Windows:
      • Open Command Prompt as an administrator.
      • Type the command “ipconfig /flushdns” and press Enter.......
      • Mac: Utilities.
      • Type the command “dscacheutil -flushcache” and press Enter.

        Remember, clearing the DNS cache might temporarily slow down your browsing for a brief period while the cache rebuilds.

        3. Restart your router

        Sometimes, a simple router restart can resolve DNS issues and improve performance. Here’s how:

        1. Locate the power button on your router and turn it off.
        2. Wait for about 10-15 seconds.
        3. Turn the router back on and wait for it to fully restart.

        This process will clear any temporary glitches or conflicts that may have been causing the slow DNS server.

        4. Contact your ISP

        If you’ve tried all the above steps and are still experiencing slow DNS resolution, it may be worth reaching out to your Internet Service Provider (ISP) for assistance. They may be able to provide further troubleshooting steps or investigate if there are any widespread issues in your area.


        A slow DNS server can significantly impact your internet browsing experience. By changing your DNS server, clearing the cache, restarting your router, or seeking help from your ISP, you can resolve these issues and enjoy faster browsing speeds. Remember to try each step sequentially and test if the problem is resolved before moving on to the next step.

        Now that you know how to fix a slow DNS server, go ahead and implement these solutions to optimize your internet experience!

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