rpsl.ripe.net doesn't seem to exist ...
whois -h whois rpsl.ripe.net Daniele Arena
whois: whois: Unknown host: Datei oder Verzeichnis nicht gefunden
Let's have a look ...
;; ANSWER SECTION:
rpsl.ripe.net. 1d23h59m55s IN CNAME reimp.ripe.net.
reimp.ripe.net. 1d23h59m55s IN CNAME orange.ripe.net.
orange.ripe.net. 1d23h59m55s IN A 193.0.1.239
Yeah, don't do that. Don't use CNAME to CNAME. Pls fix,
Arnold