mail2.mkrovlya.ru has no NS records.
NS records for this zone are defined at mkrovlya.ru.
NS records for this zone are defined at mkrovlya.ru.
Question and response
Question
dig mail2.mkrovlya.ru. NS
Answer
The response has no answer records.
Authority
mkrovlya.ru. 60 SOA ns3.mkrovlya.ru. root.mkrovlya.ru. 2025030472 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0