sites.filanco.ru has no NS records.
NS records for this zone are defined at filanco.ru.
NS records for this zone are defined at filanco.ru.
Question and response
Question
dig sites.filanco.ru. NS
Answer
The response has no answer records.
Authority
filanco.ru. 1800 SOA ns10.hoster.ru. support.hoster.ru. 3602266593 3600 300 604800 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0