What happens if the Cloudflare DNS provider hostname changes unexpectedly?

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Grade: Education Subject: Support
What happens if the Cloudflare DNS provider hostname changes unexpectedly?
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If the Cloudflare DNS provider hostname changes unexpectedly, your website will likely become inaccessible. You must immediately update the nameservers at your domain registrar with the new ones provided by Cloudflare. This process can take up to 48 hours to fully propagate, during which time your website may experience downtime.