agent.erlang.ru has no NS records.
NS records for this zone are defined at erlang.ru.
NS records for this zone are defined at erlang.ru.
Question and response
Question
dig agent.erlang.ru. NS
Answer
The response has no answer records.
Authority
erlang.ru. 3600 SOA ns.sco.ru. it.erlang.ru. 2025100801 600 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0