mail.sib-inet.ru has no NS records.
NS records for this zone are defined at sib-inet.ru.
NS records for this zone are defined at sib-inet.ru.
Question and response
Question
dig mail.sib-inet.ru. NS
Answer
The response has no answer records.
Authority
sib-inet.ru. 86400 SOA ns1.sib-inet.ru. hostmaster.sv-en.ru. 2025050501 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0