rm.rightside.ru has no NS records.
NS records for this zone are defined at rightside.ru.
NS records for this zone are defined at rightside.ru.
Question and response
Question
dig rm.rightside.ru. NS
Answer
The response has no answer records.
Authority
rightside.ru. 1400 SOA ns.rightside.ru. root.rightside.ru. 2026022401 10800 3600 604800 1400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0