mail.central01.net has no NS records.
NS records for this zone are defined at central01.net.
NS records for this zone are defined at central01.net.
Question and response
Question
dig mail.central01.net. NS
Answer
The response has no answer records.
Authority
central01.net. 3600 SOA ns1.central01.net. joaopaulo.central01.net. 2026010501 3600 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0