Find Cloudflare Ip to Domain

Hello, on my server appeared 2 IP addresses, which I can not assign.
These are from Cloudflare. What is the best way to find the domain name for this ip? Even if the IP is attributed to multiple domains.

** server can’t find SERVFAIL
Hostname: and

Thank you for help

When you enable Cloudflare for SSL, performance, ETC then Cloudflare will become the server your DNS points to, and requests will then be proxied to your origin server.

For security, Cloudflare does not publish or provide all domains on its infrastructure, and does not provide a list of IP->domain.

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