hd2.leonix.org has no CNAME records.
Question and response
Question
dig hd2.leonix.org. NS
Answer
The response has no answer records.
Authority
leonix.org. 300 SOA ns1.leonix.fr. hostmaster.leonix.fr. 2026022500 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0