Is It Safe to Clear DNS Server Cache?


Angela Bailey

Is It Safe to Clear DNS Server Cache?

When it comes to troubleshooting network issues or improving website performance, clearing the DNS server cache can be a helpful step. However, it’s important to understand the implications and potential risks involved in this process. In this article, we will delve into the topic of clearing DNS server cache and discuss its safety.

What is DNS Server Cache?

DNS stands for Domain Name System, which is responsible for translating domain names into IP addresses. DNS server cache refers to the temporary storage of previously resolved domain names and their corresponding IP addresses on your local device or network.

The Purpose of DNS Server Cache

The primary purpose of DNS server cache is to improve the efficiency of web browsing by reducing the time required to resolve domain names. When you visit a website, your computer or network checks its local DNS server cache first before querying external DNS servers. If the requested domain name is found in the cache, the associated IP address can be retrieved without making a new request to an external server.

Why Clear DNS Server Cache?

There are several reasons why you might want to clear your DNS server cache:

  • Troubleshooting Network Issues: When experiencing connectivity problems or unable to access certain websites, clearing the DNS server cache can help resolve these issues by forcing your device or network to retrieve fresh data from external servers.
  • Website Updates: If you recently made changes to your website’s DNS settings and want those changes to take effect immediately across all devices and networks, clearing the DNS server cache can help propagate these updates faster.
  • Privacy Concerns: Clearing your local device’s DNS cache can remove traces of websites you have visited, enhancing your privacy and security online.

Is It Safe to Clear DNS Server Cache?

The act of clearing DNS server cache is generally safe, but it’s essential to consider a few factors:

Potential Temporary Disruptions:

Clearing the DNS server cache might result in temporary disruptions in web browsing or network connectivity. This is because your device or network will need to rebuild its cache by querying external DNS servers for all requested domain names again. However, these disruptions are usually short-lived and should not cause any significant issues.

Loss of Local Data:

When you clear the DNS server cache, you will lose the locally cached data, which includes resolved domain names and IP addresses. As a result, subsequent requests for previously visited websites will take slightly longer as they need to be resolved again.

Dependence on External Servers:

After clearing the DNS server cache, your device or network becomes more reliant on external DNS servers for resolving domain names. If there are issues with these servers or they experience downtime, it might affect your web browsing experience until the issue is resolved.

How to Clear DNS Server Cache

The process of clearing DNS server cache varies depending on the operating system:

  • Windows: Open Command Prompt as an administrator and run the command: ipconfig /flushdns.
  • macOS: Open Terminal and run the command: dscacheutil -flushcache.
  • Linux: Open Terminal and run the command: sudo systemctl restart network-manager.

It’s important to note that clearing DNS server cache only affects the local device or network where the command is executed. It does not affect other devices or networks.


In conclusion, clearing DNS server cache can be a useful step in troubleshooting network issues and ensuring website updates propagate quickly. While generally safe, it’s essential to be aware of potential temporary disruptions, loss of local data, and dependence on external servers. By understanding these factors and following the correct procedures, you can safely clear your DNS server cache when needed.

Discord Server - Web Server - Private Server - DNS Server - Object-Oriented Programming - Scripting - Data Types - Data Structures

Privacy Policy