What Is My ISP DNS Server?


Heather Bennett

Are you curious about the DNS server used by your Internet Service Provider (ISP)? In this article, we will explore what an ISP DNS server is and why it is important.

We will also learn how to find out the DNS server used by your ISP. So, let’s get started!

What is an ISP DNS server?

An ISP DNS (Internet Service Provider Domain Name System) server is a specialized computer that translates domain names, like example.com, into IP addresses that computers can understand. When you type a website address into your browser, your computer sends a request to the ISP DNS server to resolve the domain name to its corresponding IP address.

This translation process is necessary because computers communicate with each other using IP addresses, which are numerical representations of devices on a network. Domain names are easier for humans to remember and use than IP addresses.

Why is knowing your ISP DNS server important?

Knowing your ISP DNS server can be useful for several reasons:

  • Network troubleshooting: If you are experiencing network issues or difficulties accessing certain websites, knowing your ISP’s DNS server can help you diagnose and fix problems more effectively.
  • Security: Some ISPs have been known to redirect users’ web traffic or display ads by tampering with their DNS responses. By knowing your ISP’s DNS server, you can ensure that you’re using a trusted source for resolving domain names.
  • DNS performance: Different ISPs may have varying levels of DNS performance. By identifying your provider’s DNS server, you can assess its speed and reliability compared to other public DNS services like Google Public DNS or Cloudflare.

Finding out your ISP DNS Server

There are a few ways to find out the DNS server used by your ISP:

1. Router Configuration Page

Most routers have a web-based configuration page that allows you to access various settings, including DNS server information. To find out your ISP DNS server using this method, follow these steps:

  1. Connect to your router’s network.
  2. Open a web browser and enter your router’s IP address into the address bar. The IP address is typically something like or 192.1.1. If you’re not sure, consult your router’s manual or search online for the default IP address of your specific router model.
  3. Login to the router’s configuration page using the username and password provided by your ISP.
  4. Navigate to the DNS settings section, which may be located under “Network” or “Internet” settings.
  5. Look for the primary and secondary DNS server addresses provided by your ISP.

2. Command Prompt or Terminal

If you prefer using command-line tools, you can find out your ISP DNS server by following these steps:

  1. Open the Command Prompt (Windows) or Terminal (Mac/Linux).
  2. Type the command ipconfig /all (Windows) or ifconfig -a (Mac/Linux) and press Enter/Return.
  3. In the displayed output, look for entries like “DNS Servers” or “DNS Resolver”. The listed IP addresses are your ISP DNS servers.

Note: The steps provided here are general guidelines, and the exact process may vary depending on your router model or operating system.


Understanding your ISP DNS server and how to find it can be valuable knowledge for troubleshooting network issues, ensuring security, and optimizing DNS performance. By following the methods outlined in this article, you can easily discover the DNS server used by your Internet Service Provider.

Now that you have a better understanding of ISP DNS servers, feel free to explore further or dive deeper into related topics such as configuring alternative DNS servers for improved speed and reliability.

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