By Nisan Team · Updated August 2026 · 6 min read

What Is DNS? How It Works and Does Changing DNS Speed Up Internet?

Every time you open a website, your device needs to find its address on the internet. That address is an IP number — but humans remember names like google.com. DNS (Domain Name System) is the phonebook that converts names into numbers.

Simple analogy: DNS is like your phone contacts. You tap "Mom" instead of remembering the full number. DNS lets you type a website name instead of an IP address.

How DNS Works (Step by Step)

You type nisan.co.in in your browser.
Your device asks a DNS server: "What IP belongs to this name?"
The DNS server replies with an IP address.
Your browser connects to that IP and loads the page.

This lookup usually takes milliseconds. If DNS is slow or broken, pages feel slow to open — even when your download speed is fine.

Does Changing DNS Speed Up Internet?

Changing DNS does not increase Mbps. A 50 Mbps plan stays 50 Mbps. What it can improve is how quickly website names resolve. If your ISP DNS is overloaded, switching to a faster public DNS (like Cloudflare 1.1.1.1 or Google 8.8.8.8) can make sites open a bit snappier.

Common DNS Problems

DNS server not found — device cannot reach DNS
Site works on mobile data but not WiFi — often a router DNS issue
Only some sites fail — cached/wrong DNS entry

Bottom line: DNS is essential for browsing, but it is not a replacement for a good fiber plan. For Bilimora homes, a reliable FTTH connection matters far more than switching DNS. Learn more in our ISP buyer checklist.

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Frequently Asked Questions

What is DNS?

DNS (Domain Name System) turns website names like google.com into IP addresses that computers understand. Without DNS, you would have to type numbers instead of names.

Does changing DNS make internet faster?

Sometimes it can make websites open a little faster if your current DNS is slow. It does not increase your Mbps plan speed — it only helps name lookup time.

What DNS should I use?

Popular public options include Google DNS (8.8.8.8) and Cloudflare (1.1.1.1). For most home users, the ISP default DNS is fine unless it is slow or unreliable.

What does DNS server not found mean?

It usually means your device cannot reach a DNS server — often a temporary network issue, wrong DNS setting, or the router lost internet connectivity.