Why does DNS take so long to propagate?

Every time we add a domain to a browser bar, or click on a link, a request is generated which goes through several sites before taking you to the website you want. In this process, we encounter the DNS servers, which are very important.

DNS is an acronym for Domain Name System. Roughly speaking, this means we can type articagency.com or www.google.com into a browser and it will display the website we want.

DNS servers are responsible for “translating” the domain name request into the IP address of the server hosting the website and then forwarding the user’s request to its destination. The technical answer is more complex, but to understand it in a basic way, it would be something similar.

Why Does DNS Take So Long to Propagate?

If a DNS change is ever made to a domain, it will point to a different DNS server, and that server will determine which IP address to look at and which website to display.

This change may take several hours, or even more than 24 hours in some cases.

This is because the companies that supply us with Internet (IPS) such as Movistar, Orange, etc., cache data from all the DNS servers in the world to speed up traffic and save resources.

Why does it take a while for changes to appear in the cache?

So, when a DNS change is made to a domain, this change is not reflected until all this data is updated with each Internet provider.

The time it takes to clear the cache to update the data will depend on the internal policy of each of these companies, as it is not standardized.

It can take up to two days for complete propagation to all DNS servers worldwide. However, they are usually propagated within a few hours.