mx.digital.rt.ru has no NS records.
NS records for this zone are defined at digital.rt.ru.
NS records for this zone are defined at digital.rt.ru.
Question and response
Question
dig mx.digital.rt.ru. NS
Answer
The response has no answer records.
Authority
digital.rt.ru. 86400 SOA ns1.digital.rt.ru. hostmaster.digital.rt.ru. 2026020400 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0