I found that the domain was blocked by my pihole, using the following list: https://v.firebog.net/hosts/AdguardDNS.txt https://v.firebog.net/hosts/AdguardDNS.t

I found that the domain was blocked by my pihole, using the following list: https://v.firebog.net/hosts/AdguardDNS.txt https://v.firebog.net/hosts/AdguardDNS.txt, which is available from https://firebog.net/ https://firebog.net/ I don't see any particular reason for it, so I've since whitelisted it. It is indeed an odd choice, but its a long-used namespace which sees a dwindling number of available and useful domain names over time, IMO.