nmc.sibsvst.ru has no NS records.
NS records for this zone are defined at sibsvst.ru.
NS records for this zone are defined at sibsvst.ru.
Question and response
Question
dig nmc.sibsvst.ru. NS
Answer
The response has no answer records.
Authority
sibsvst.ru. 86400 SOA sibsvst.ru. root.sibsvst.ru. 2021122601 28800 14400 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0