zimbra.OSKNSK.RU has no NS records.
NS records for this zone are defined at OSKNSK.RU.
NS records for this zone are defined at OSKNSK.RU.
Question and response
Question
dig zimbra.OSKNSK.RU. NS
Answer
The response has no answer records.
Authority
OSKNSK.RU. 3600 SOA ns1.reg.RU. hostmaster.ns1.reg.RU. 1770641300 14400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0