mx.COMSTAR.RU has no NS records.
NS records for this zone are defined at COMSTAR.RU.
NS records for this zone are defined at COMSTAR.RU.
Question and response
Question
dig mx.COMSTAR.RU. NS
Answer
The response has no answer records.
Authority
comstar.ru. 86400 SOA dns0.mtu.ru. dns.mts.ru. 2025021302 3600 900 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0