whois https://www.garten-gestaltung.wien/
Domain:
Turn off cache
Try for webbased whois (don't expect it to work yet)
https://www.garten-gestaltung.wien/
checking....https://www.garten-gestaltung.wien/
$
whois
https://www.garten-gestaltung.wien/
No whois server is known for this kind of object.