What Does Website Propagation Mean?

The internet is a strange and wondrous place, but it is constantly changing. It’s hard to keep up. We are here to help by explaining “what does that mean?”

Website propagation is the process of DNS, domain, or hosting changes spreading across internet providers and networks so visitors are sent to the correct version of your website.

In practical terms, propagation is why one person may see your new website immediately while someone else still sees the old version for a few hours. It commonly happens after launching a new website, moving to a new host, changing DNS records, or updating where a domain name points.

This process is often called domain name propagation or DNS propagation.

How DNS and Domain Propagation Work

Whenever you purchase a domain name, the registrar controls how that name is located. Your website is on a server, like virtual postal address. Your registrar stores your virtual address and sends people there when they come looking for your URL (there are other options as well, but let’s go with this for now). To illustrate, check the flow chart:

In a way, it’s like the post office. You put a piece of mail in the mailbox. The postal service gets it and routes it to its destination. Of course, the online process takes milliseconds rather than days or weeks, but same basic idea applies.

Now, here’s where propagation comes in. When you move your website to a new host, you must tell your registrar so it knows where to direct people looking for it. It updates your domain name information, but not everyone gets that information immediately. It can take as little as a few minutes or as long as a day or two for every Internet provider on the planet to recognize that change. The time it takes to make that change is called propagation.

How Long Does Website Propagation Take?

Website propagation can take anywhere from a few minutes to 24–48 hours, depending on the domain registrar, DNS settings, internet providers, caching, and the type of record being changed.

Some updates, such as changing an A record, may appear quickly. Larger domain or nameserver changes can take longer because many networks around the world need to recognize and refresh the new information.

Why is it still a thing?

Despite being insanely fast, the Internet is still a vast web of computer networks (not a series of tubes) and not all of them respond as quickly or at the same time as others. While Comcast might find and make the change in 10 minutes, it could take another provider 12 hours. Propagation varies based on how often the network looks for changes and how quickly they can implement them.

How does it impact my website?

If you decide to move your domain name, you will likely have to wait for propagation to occur before it works for everyone. We’ve seen instances when checking a hosting change from a phone (on a cellular network, for example) produced a perfect result in minutes while an in-office wired network took several hours. In essence, if you have an old website on one server and a new one on another, it’s possible (likely even) that different people will see different versions of your website for a few hours while propagation continues.

What do I do about it?

There are ways around it. If you are keeping your email in the same spot, but only moving your website, you can change only that part of the domain name information – referred to as an A NAME record. Propagation for those kinds of changes often takes just a couple minutes, long enough for the registrar to update its internal records. But, if moving the entire domain name is necessary, you might consider making the switch late in the day. That way, propagation occurs during off-peak hours. The same goes for weekends, which is a popular time to make these kinds of changes.

What Should You Do If Propagation Is Not Working?

If your website change is not showing everywhere yet, it does not always mean something is broken. First, check the site from a different browser, device, or network. A phone on cellular data may show the new site while an office computer on Wi-Fi still shows the old one.

You can also clear your browser cache, check your DNS settings, confirm the correct records were updated, and make sure your hosting account is configured properly. If email records were changed at the same time, it is especially important to confirm those settings before assuming propagation is complete.

Need help launching, moving, or troubleshooting a website? Site Mender provides ongoing website maintenance, managed hosting support, and WordPress troubleshooting for businesses that need their websites to work reliably.

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Fortunately, website propagation is something every business has to deal with from time to time. If you are launching a new website, moving hosting, changing DNS, or trying to figure out why a site update is not showing everywhere yet, contact Site Mender. We can help make the process smoother, propagation and all.