If I make changes to my DNS records, how quickly do they take effect?
Changes within your DNS zone
When you make changes within your DNS zone (such as changing the IP address of your web server), they are updated immediately across all our DNS servers. You should expect to wait several hours and generally longer for everyone to see your new DNS records, due to the effects of DNS caching.
When delegation changes are made, the DNS entries at the registry level are also changed. It can take 24 hours or more for these changes to be visible to other name servers since the results are cached for a given period of time in the domain record.
Therefore, it is advised to keep your old name servers online for a few days after making any nameserver changes.
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Last updated on 15 July 2010