appsrvs2.r01.ru has no NS records.
NS records for this zone are defined at r01.ru.
NS records for this zone are defined at r01.ru.
Question and response
Question
dig appsrvs2.r01.ru. NS
Answer
The response has no answer records.
Authority
r01.ru. 600 SOA ns5.nic.ru. noc-dns.nic.ru. 2014080670 10800 1800 604800 600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0