ns2.ufanet.RU has no NS records.
NS records for this zone are defined at ufanet.RU.
NS records for this zone are defined at ufanet.RU.
Question and response
Question
dig ns2.ufanet.RU. NS
Answer
The response has no answer records.
Authority
ufanet.ru. 43200 SOA ns1.ufanet.ru. root.ufanet.ru. 2017074120 7200 1800 432000 43200
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0