mx.truhlarstvi-hnedkovsky.com has no NS records.
NS records for this zone are defined at truhlarstvi-hnedkovsky.com.
NS records for this zone are defined at truhlarstvi-hnedkovsky.com.
Question and response
Question
dig mx.truhlarstvi-hnedkovsky.com. NS
Answer
The response has no answer records.
Authority
truhlarstvi-hnedkovsky.com. 3600 SOA dns.truhlarstvi-hnedkovsky.com. hostmaster.truhlarstvi-hnedkovsky.com. 1602222578 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0