ns2.dns4u.ru has no NS records.
NS records for this zone are defined at dns4u.ru.
NS records for this zone are defined at dns4u.ru.
Question and response
Question
dig ns2.dns4u.ru. NS
Answer
The response has no answer records.
Authority
dns4u.ru. 3600 SOA ns1.dns2b.ru. hostmaster.dns4u.ru. 2026031201 10800 3600 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0