mx1.mcra.fr has no NS records.
NS records for this zone are defined at mcra.fr.
NS records for this zone are defined at mcra.fr.
Question and response
Question
dig mx1.mcra.fr. NS
Answer
The response has no answer records.
Authority
mcra.fr. 600 SOA ns0.mcra.fr. system.ml.mcra.fr. 2026021600 3600 900 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0