ftp.ciberserver.net has no NS records.
NS records for this zone are defined at ciberserver.net.
NS records for this zone are defined at ciberserver.net.
Question and response
Question
dig ftp.ciberserver.net. NS
Answer
The response has no answer records.
Authority
ciberserver.net. 86400 SOA ns1.ciberserver.com. status.ciberconceito.com. 2025103108 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0