I don't know if this is expected but jedi.ripe.net does not respond to queries.
$ curl -v https://jedi.ripe.net/
* Trying 2001:67c:2e8:11::c100:1370:443...
* Trying 193.0.19.112:443...
--
Denis Fondras / Liopen
Dear colleagues,
In this new guest post on RIPE Labs, Christer Weinigel from Netnod gets into the Network Time Protocol (NTP), a simple but effective way to ensure good time keeping. Learn more about how NTP works, what you can do to improve accuracy, and how to decide which NTP servers are best for you:
https://labs.ripe.net/author/christer-weinigel/best-practices-for-connectin…
Kind regards,
Alun Davies
RIPE Labs Editor
RIPE NCC