Quick summary
- What it is: DNS propagation is the process by which a change made to a domain's DNS records — such as changing nameservers, modifying an A record or updating MX records — gradually.
- What it's for: it helps connect the domain with the website, email and other associated services.
- When to check it: when changing DNS servers, connecting a domain, configuring email or reviewing propagation.
DNS propagation is the process by which a change made to a domain's DNS records — such as changing nameservers, modifying an A record or updating MX records — progressively spreads to all DNS servers worldwide until all show the updated information.
Why does it take time to propagate?
DNS servers around the world store (cache) domain information for a set amount of time called TTL (Time to Live). Until that cache time expires, a DNS server will continue returning old information even if you have already made the change. Once the TTL expires, the server queries again and gets the updated data.
How long does propagation take?
It depends on the TTL configured in the DNS record you modified:
- With a low TTL (300–900 seconds): changes can be seen in 15–30 minutes.
- With a standard TTL (3600–14400 seconds): propagation can take between 1 and 4 hours.
- In cases with a high TTL or nameserver changes: up to 24–48 hours.
Why do you see your website before others during propagation?
This is completely normal. Different DNS servers — your Internet provider's, your company's, your home's — update at different speeds. That is why you may see the new site while another person still sees the old one, or vice versa.
When will you encounter it?
DNS propagation appears in these common situations:
- You move the domain to a new hosting provider.
- You modify your domain's nameservers.
- You update DNS records (A, MX, CNAME, TXT).
- Your website or email does not work for a few hours after a change.
If you have just made a change and the website is not loading or email is not arriving, it is most likely that the change is propagating. In that case, the best thing is to wait and not undo the changes.
Why it matters in hosting
Understanding this concept will help you make better decisions when managing your service. In practice, it relates to the connection between the domain, the website, email and other associated services. If it appears in a guide, the control panel or a support response, review the context before making changes.
Related articles
- Domain
- DNS
- Nameservers
- A Record
- CNAME Record