mx1.lyon.fr has no NS records.
NS records for this zone are defined at lyon.fr.
NS records for this zone are defined at lyon.fr.
Question and response
Question
dig mx1.lyon.fr. NS
Answer
The response has no answer records.
Authority
lyon.fr. 7200 SOA nsa.perf1.fr. technical.nameshield.net. 2026031913 28800 7200 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0