ns2.dnsbackup.net has no NS records.
NS records for this zone are defined at dnsbackup.net.
NS records for this zone are defined at dnsbackup.net.
Question and response
Question
dig ns2.dnsbackup.net. NS
Answer
The response has no answer records.
Authority
dnsbackup.net. 86400 SOA ns1.dnsbackup.net. root.dnsbackup.net. 2026021701 86400 7200 1857600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0