On 02 Apr 2022, Andrew Leary said the following...

 TS> does anybody know a free dyn DNS service that supports IPv6?

 AL> Hurricane Electric (he.net) offers free DNS to all of their IPv6
 AL> certification  and tunnel users.  It can be updated dynamically similar
 AL> to dyndns.org.

This is what I use with my custom domain.  (https://dns.he.net)

I just have a cron job setup to periodically poll using curl.  Example from the above URL:

Autodetect my IPv4/IPv6 address:
% curl -4 http://dyn.example.com:pword@dyn.dns.he.net/nic/update?hostname=dyn.example.com
% curl -6 http://dyn.example.com:pword@dyn.dns.he.net/nic/update?hostname=dyn.example.com


Jay

... Everybody is somebody else's weirdo.

--- Mystic BBS v1.12 A48 2022/04/03 (Raspberry Pi/32)