I’ve been doing some testing with the API and Cloudflare appears to be pretty fast at detecting once a domain has its nameservers pointed to Cloudflare.
But when a domain changes its nameservers to a different provider, how long does it take Cloudflare to recognize that?
I add a domain, pointed the domain to CF and it detected that within about 10 minutes. I then switched the nameservers to a different DNS provider. But about 18 hours later Cloudflare still lists it as active in the dashboard and API.
I’ve tried using
Zone Details and
Zone Activation Check in the API to detect that it’s no longer pointed to Cloudflare but both keep saying it’s active.
I couldn’t find anything in any docs that stated how often they check to see if a zone is still active. Also, I wasn’t sure if they set a minimum time that it has to be pointed away for it to be marked as inactive. For example, maybe someone didn’t notice the nameservers changed due to it expiring, but maybe CF wants to give them 2-3 days to fix it before marking it as inactive…