Changed Your DNS But Website Still Not Updating? Here’s Why.

You updated your domain.

You cleared cache.

You refreshed 20 times.

Still seeing the old website?

Welcome to DNS propagation.

🌍 What’s Actually Happening?

When you change a DNS record (A, MX, TXT, NS, etc.), the update doesn’t go live worldwide instantly.

Why?

Because DNS data is cached by:

ISPs

Public DNS resolvers (Google, Cloudflare)

Browsers

Operating systems

This caching improves performance — but it also causes delay after changes.

⏳ How Long Does DNS Propagation Take?

It depends on TTL (Time To Live).

Example:

TTL = 3600 seconds (1 hour)

That means some users may still see old data for up to 1 hour.

In some cases, propagation can take:

5–30 minutes

Up to 24–48 hours (rare but possible)

🔎 How I Check If DNS Has Updated Globally

Instead of guessing, I check DNS status from multiple regions.

I use this DNS lookup tool:

👉 https://getdnsinfo.com/

It lets you instantly check:

A Records

MX Records

TXT Records

CNAME

NS Records

This helps quickly confirm whether the issue is propagation or something else.

🧠 Pro Tip for Developers

Before migrating servers:

✔ Lower TTL 24 hours in advance
✔ Wait for TTL to expire
✔ Then update DNS

This reduces downtime significantly.