mx1.hostmaster.ua has no NS records.
NS records for this zone are defined at hostmaster.ua.
NS records for this zone are defined at hostmaster.ua.
Question and response
Question
dig mx1.hostmaster.ua. NS
Answer
The response has no answer records.
Authority
hostmaster.ua. 1818 SOA ho1.ns.hostmaster.ua. dnsmaster.hostmaster.ua. 2026022300 3636 1818 1814181 1818
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0