plesk.esoo.ru has no NS records.
NS records for this zone are defined at esoo.ru.
NS records for this zone are defined at esoo.ru.
Question and response
Question
dig ns4.esoo.ru. NS
Answer
The response has no answer records.
Authority
esoo.ru. 10800 SOA ns1.esoo.ru. hostmaster.esoo.ru. 2025111800 43200 7200 360000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0