ftp1.rcpod.siberia.net has no NS records.
NS records for this zone are defined at rcpod.siberia.net.
NS records for this zone are defined at rcpod.siberia.net.
Question and response
Question
dig ftp1.rcpod.siberia.net. NS
Answer
The response has no answer records.
Authority
rcpod.siberia.net. 86400 SOA ns.rcpod.siberia.net. root.rcpod.siberia.net. 2023011515 7200 900 86400 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0