mail.agrico.com.ua has no NS records.
NS records for this zone are defined at agrico.com.ua.
NS records for this zone are defined at agrico.com.ua.
Question and response
Question
dig mail.agrico.com.ua. NS
Answer
The response has no answer records.
Authority
agrico.com.ua. 1800 SOA nsa2.srv53.net. support.dnshosting.org. 1771585802 1800 600 2419200 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0