Hi,
It would be nice if you could add support for the German DynDNS provider Core Networks.
They’re DynDNS2 compatible (according to their docs).
Public docs: https://www.core-networks.de/faq/dyndns-client.html
Example request URL: https://dyndns.core-networks.de/?hostname=<domain>&myip=<ipaddr>,<ip6addr>
Regards