Why Does My DNS Server Keep Changing?


Heather Bennett

Why Does My DNS Server Keep Changing?

If you’ve ever experienced the frustration of your DNS server constantly changing, you’re not alone. This unexpected behavior can disrupt your internet connection and make it difficult to access websites and online services. In this article, we’ll explore the reasons behind this issue and provide some solutions to help you resolve it.

What is a DNS server?

Before we dive into the reasons for the ever-changing DNS server, let’s quickly understand what a DNS server is. DNS stands for Domain Name System, which is responsible for translating human-readable domain names (like www.example.com) into IP addresses (like that computers use to connect to each other on the internet.

A DNS server acts as a directory that maintains a database of domain names and their corresponding IP addresses. When you enter a URL in your web browser, your computer contacts a DNS server to obtain the IP address associated with that domain name.

Reasons for changing DNS servers

1. DHCP configuration

In many cases, your internet service provider (ISP) uses Dynamic Host Configuration Protocol (DHCP) to assign IP addresses and other network settings to devices on their network. This includes the DNS server address.

DHCP is designed to automatically configure network settings, including the DNS server, when you connect to a network. However, if there are issues with your ISP’s DHCP configuration or if they frequently update their network infrastructure, it can cause your DNS server to change frequently.

2. Malware or adware infections

Malicious software or adware can alter your computer’s network settings, including the DNS server address. These infections often redirect your internet traffic through malicious servers, allowing hackers to monitor your online activities or inject unwanted advertisements into your browsing experience.

If you suspect that malware or adware is causing your DNS server to change, it’s crucial to perform a thorough scan of your system using reputable antivirus or anti-malware software.

3. Router issues

Your router plays a crucial role in connecting your devices to the internet. If there are issues with your router’s firmware or configuration, it can lead to frequent DNS server changes.

Updating your router’s firmware and ensuring its settings are correctly configured can help resolve this issue. Additionally, restarting your router can sometimes fix temporary glitches that may be causing the DNS server changes.

How to fix the issue?

Now that we’ve explored the possible reasons behind the ever-changing DNS server, let’s discuss some solutions:

1. Manual DNS configuration

  • Step 1: Open the Network and Sharing Center on Windows (or System Preferences on macOS).
  • Step 2: Go to the network adapter settings and select “Properties” (or “Advanced” on macOS).
  • Step 3: Locate the Internet Protocol Version 4 (TCP/IPv4) option and click on “Properties”.
  • Step 4: Select “Use the following DNS server addresses” and enter reliable DNS server addresses like Google Public DNS (8.8.8 and 8.4.4) or OpenDNS ( and 208.220.220).

2. Resetting network settings

  • Step 1: Open the Command Prompt (Windows) or Terminal (macOS).
  • Step 2: Type the following command and press Enter: ipconfig /flushdns.
  • Step 3: Restart your computer to apply the changes.

3. Consult your ISP

If you’ve tried the above solutions and are still experiencing frequent DNS server changes, it’s recommended to contact your ISP for assistance. They can provide specific troubleshooting steps or check if there are any known issues with their network.

Note: It’s important to document when and how frequently your DNS server changes, as this information will be useful when discussing the issue with your ISP.

In conclusion

The ever-changing DNS server can be a frustrating issue, but understanding the reasons behind it and implementing the appropriate solutions can help restore stability to your internet connection. Whether it’s adjusting network settings, scanning for malware, or seeking assistance from your ISP, taking proactive steps will ensure a smoother browsing experience.

Remember, maintaining a reliable DNS server is crucial for seamless internet connectivity and uninterrupted access to websites and online services.

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