> There are times where a AAAA record points to an IP that doesn't respond, but the A record responds and so on > If it went down for months I wouldn't notice.

> There are times where a AAAA record points to an IP that doesn't respond, but the A record responds and so on > If it went down for months I wouldn't notice. you are not alone. I am building a service to monitor such events. usual up-time monitors mostly checks the v4 address. https://v6monitor.com/tools/ipv6-check https://v6monitor.com/tools/ipv6-check