mx01.thalesgroup.com has no NS records.
NS records for this zone are defined at thalesgroup.com.
NS records for this zone are defined at thalesgroup.com.
Question and response
Question
dig mx01.thalesgroup.com. NS
Answer
The response has no answer records.
Authority
thalesgroup.com. 900 SOA ns1.thalesgroup.com. operateur-dns.thalesgroup.com. 2026022095 21600 3600 3600000 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0