_spf.mail.isx.net.nz has no NS records.
NS records for this zone are defined at isx.net.nz.
NS records for this zone are defined at isx.net.nz.
Question and response
Question
dig _spf.mail.isx.net.nz. NS
Answer
The response has no answer records.
Authority
isx.net.nz. 3600 SOA ns1.net24.net.nz. hostmaster.net24.net.nz. 2026022610 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0