mx.lisod.ua has no NS records.
NS records for this zone are defined at lisod.ua.
NS records for this zone are defined at lisod.ua.
Question and response
Question
dig mx.lisod.ua. NS
Answer
The response has no answer records.
Authority
lisod.ua. 3600 SOA nsa4.srv53.net. support.dnshosting.org. 1766141851 1800 600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0