mail18.hub.sknt.ru has no NS records.
NS records for this zone are defined at sknt.ru.
NS records for this zone are defined at sknt.ru.
Question and response
Question
dig mail18.hub.sknt.ru. NS
Answer
The response has no answer records.
Authority
sknt.ru. 600 SOA ns.sknt.ru. master.hub.sknt.ru. 2026032312 1800 300 604800 900
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0