DNS propagation: What causes it?

Most likely, you’ve heard the phrase “DNS propagation,” but you’re not really clear what it means. You’re not alone, so don’t worry. In that way, in this article, we will give a simple explanation of DNS propagation.

What DNS propagation means?

The act of updating and disseminating all of your new changes to the Domain Name System is known as DNS (Domain Name System) propagation. And it’s all over the internet.

If you manage a network or own an internet business, you are aware that the DNS needs to be changed frequently. For example, a DNS record may need to be updated, a new one added, or it may need to be edited to replace IP addresses.

Any modifications you make will be kept on a single authoritative server. The problem is that the network has more DNS servers than necessary. They all require various updates and adjustments. As a result, they won’t function fully if something goes wrong.

The way it works

A DNS update is essential in a number of circumstances. Examples of common ones are moving to a new hosting provider or redesigning your outdated website. Other situations that can call for it include adding services like FTP and email or redirecting from the primary domain to subdomains. Actions like creating, modifying, or removing DNS records are included in each of these instances.

These adjustments will be made directly on the authoritative server by the administrator. Therefore, the procedure of updating must take place after the changes are saved there. As a result, a copy of the new DNS entries must be sent to each DNS server connected to the network.

Although the DNS propagation process is underway, not all servers experience it at the same time.

Does DNS propagation take long?

DNS propagation takes some time to complete. It can require 24 or even 72 hours. The TTL values and the date that your recursive DNS servers received an update determine everything. If the DNS records it has in its cache memory have not expired, a recursive server won’t look for updates.

In addition, the propagation time varies for different DNS records. As the primary DNS records for your domain, NS (nameservers) and A records propagate in as little as 24 hours (often less). Occasionally, it could take up to 72 hours. Then, in a few hours, other DNS records often spread.

Moreover, it is challenging to tell when propagation is complete without utilizing a DNS resolution tool because it depends on the record’s TTL setting, a visitor’s ISP, and location.


When managing DNS, you will frequently encounter the critical operation of DNS propagation. By altering the TTL settings, you can influence it in your favor. First, you need to fully comprehend the procedure, though, in order to master it.

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