mxguardian-net.mxguardian.net has no NS records.
NS records for this zone are defined at mxguardian.net.
NS records for this zone are defined at mxguardian.net.
Question and response
Question
dig mxguardian-net.mxguardian.net. NS
Answer
The response has no answer records.
Authority
mxguardian.net. 3600 SOA ns01.mxguardian.net. support.mxguardian.net. 1773730881 3600 1800 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0