ns2-cloud.nic.RU has no NS records.
NS records for this zone are defined at nic.RU.
NS records for this zone are defined at nic.RU.
Question and response
Question
dig ns2-cloud.nic.RU. NS
Answer
The response has no answer records.
Authority
nic.RU. 300 SOA ns5.nic.RU. noc-dns.nic.RU. 650335419 14400 3600 2592000 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0