smtp3.1cupis.ru has no NS records.
NS records for this zone are defined at 1cupis.ru.
NS records for this zone are defined at 1cupis.ru.
Question and response
Question
dig smtp3.1cupis.ru. NS
Answer
The response has no answer records.
Authority
1cupis.ru. 60 SOA a.ns.selectel.ru. support.selectel.ru. 2026031301 10800 3600 604800 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0