ns1.yandexcloud.net has no NS records.
NS records for this zone are defined at yandexcloud.net.
NS records for this zone are defined at yandexcloud.net.
Question and response
Question
dig ns1.yandexcloud.net. NS
Answer
The response has no answer records.
Authority
yandexcloud.net. 300 SOA ns3.yandex.ru. sysadmin.yandex.ru. 2048213523 900 600 3600000 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0