mx1.uadns.com has no NS records.
NS records for this zone are defined at uadns.com.
NS records for this zone are defined at uadns.com.
Question and response
Question
dig mx1.uadns.com. NS
Answer
The response has no answer records.
Authority
uadns.com. 600 SOA ns1.uadns.com. hostmaster.drs.net.ua. 2025032801 28800 7200 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0