I selfhost some tools and use duckdns for names resolution but it does not seem to be working today. My ISP updated some things on there end last night and I updated my local unbound server so I’m not sure which if either of these is also playing a role but I cant seem to access duckdns. I have tried to connect to it on my phone network outside of my isp’s control and cant which leads me to believe that duckdns is down?
https://www.gnutomorrow.com/best-free-dynamic-dns-services/ Here are a few, DuckDNS is listed here funny enough