mail.dmin.pro has no NS records.
NS records for this zone are defined at dmin.pro.
NS records for this zone are defined at dmin.pro.
Question and response
Question
dig mail.dmin.pro. NS
Answer
The response has no answer records.
Authority
dmin.pro. 3600 SOA ns1.reg.com. hostmaster.ns1.reg.com. 1766084730 14400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0