ftp.bounce.guestclub.net has no NS records.
NS records for this zone are defined at bounce.guestclub.net.
NS records for this zone are defined at bounce.guestclub.net.
Question and response
Question
dig ftp.bounce.guestclub.net. NS
Answer
The response has no answer records.
Authority
bounce.guestclub.net. 300 SOA ns1.design69.net. hostmaster.design69.net. 2020071035 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0