What is DNS Propagation?
DNS (Domain Name System) is like the Internet's address book. When someone types your domain name into their browser, DNS translates that name into the correct server’s IP address, allowing the website to be found and load.
When you update DNS records, those changes must be communicated across thousands of DNS servers worldwide. Each server caches (stores) DNS records for a set period, defined by the TTL (Time To Live) value. Until the cache expires, the old DNS information may still be used.
Why Does It Take So Long?
DNS propagation can take anywhere from a few minutes upto 48 hours, depending on several factors:
Caching: Internet Service Providers (ISPs) and local DNS resolvers store DNS records to speed up browsing. They may not refresh immediately.
Geography: Some regions update their DNS caches faster than others. This means you may see your new site in one location, while someone else still sees the old one.
TTL Settings: Lower TTL values force DNS records to refresh more frequently, while higher values result in longer caching periods.
Browser Cache: Browsers also store DNS data temporarily, which can add to the delay.
How to Tell If Propagation Is Complete
You can use an online DNS checker tool to verify that your new records have propagated globally.
Try visiting your domain from different networks (e.g., mobile data vs. home Wi-Fi).
Clear your browser’s cache and flush your local DNS cache on your computer.
Key Takeaway
DNS propagation refers to the time it takes for updated DNS records to propagate across the global internet. Although it may seem slow, it’s a normal process that ensures consistency and stability. Typically, changes are fully propagated within 24–48 hours.