ns02.qdns.RU has no NS records.
NS records for this zone are defined at qdns.RU.
NS records for this zone are defined at qdns.RU.
Question and response
Question
dig ns02.qdns.RU. NS
Answer
The response has no answer records.
Authority
qdns.RU. 600 SOA ns3-l2.nic.RU. it.quantumart.RU. 65012723 14400 3600 2592000 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0