I noticed a couple of invalid ipv4 addresses in the Cloudflare learning documentation. Example address given “18.104.22.168.5.6” to my knowledge this is not a valid address. Not a major bug, but I feel when giving examples accuracy is important for the end-user.
Second paragraph of: https://www.cloudflare.com/learning/dns/glossary/dynamic-dns/
Images on: https://www.cloudflare.com/learning/dns/glossary/reverse-dns/