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What is a DNS Server?

Every website has at least one IP address, a string of numbers that tells your device where to find that site. A DNS server translates the human-readable domain name you type, like “WhatIsMyIPAddress.com”  into that numerical address so your device can make the connection.

DNS stands for Domain Name System. The servers that run it are the backbone of how you navigate the web. When you type a web address into your browser, a DNS resolver queries a DNS server to look up the matching IP address. That lookup happens in milliseconds, which means that most of the time, you never notice it.

Your ISP assigns you a DNS server by default, but that default setting isn’t your only option. Third-party DNS servers are available from companies like Google and Cloudflare, and some people switch to them for faster lookups, better reliability, or additional privacy features. Your ISP’s DNS server can log the domain names you look up, which is one reason privacy-conscious users sometimes choose an alternative.

A slow or unresponsive DNS server can make browsing feel sluggish even when your connection speed is fine. If pages are taking a long time to start loading, DNS propagation issues or an overloaded DNS server could be part of the problem.