mail.kubit-a.ru has no NS records.
NS records for this zone are defined at kubit-a.ru.
NS records for this zone are defined at kubit-a.ru.
Question and response
Question
dig mail.kubit-a.ru. NS
Answer
The response has no answer records.
Authority
kubit-a.ru. 10800 SOA ns1.reg.ru. hostmaster.ns1.reg.ru. 1768292736 14400 3600 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0