ns1.debitrx.com has no CNAME records.
Question and response
Question
dig ns1.debitrx.com. NS
Answer
The response has no answer records.
Authority
debitrx.com. 3184 SOA ns1.myinfra.fr. hostmaster.cegedim.com. 64645 3600 600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0