Hi,
on the nextdns website, we can see that:
Identify your devices
Follow the instructions below to identify your devices in Analytics and Logs.
DNS-over-TLS/QUIC
Prepend the name to the provided domain (the name should only contain a-z, A-Z, 0-9 and -). Use -- for spaces.
For "John Router", you would use John--Router-ee6135.dns.nextdns.io as your DNS-over-TLS endpoint.
DNS-over-HTTPS
Append the name to the provided URL (the name should be URL encoded).
For "John's Firefox", you would use https://dns.nextdns.io/ee6135/John's%20Firefox as your DNS-over-HTTPS endpoint.
IF I want to using Quic or http3 with dnsproxy or adguard,
if my ID is : 12345, what would be my address?
here some choices;
h3://dns.nextdns.io/12345/<device name>/
12345.dns.nextdns.io
https://dns.nextdns.io/12345
John--Router-12345.dns.nextdns.io
thanks