mx.inext.cz has no NS records.
NS records for this zone are defined at inext.cz.
NS records for this zone are defined at inext.cz.
Question and response
Question
dig mx.inext.cz. NS
Answer
The response has no answer records.
Authority
inext.cz. 3600 SOA ns1.inext.cz. hostmaster.inext.cz. 2023101289 3600 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0