mx2.omkc.ru has no NS records.
NS records for this zone are defined at omkc.ru.
NS records for this zone are defined at omkc.ru.
Question and response
Question
dig mx2.omkc.ru. NS
Answer
The response has no answer records.
Authority
omkc.ru. 3600 SOA ns.omkc.ru. root.ns.omkc.ru. 2026021704 3600 900 360000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0