mx2.altibox.net has no NS records.
NS records for this zone are defined at altibox.net.
NS records for this zone are defined at altibox.net.
Question and response
Question
dig mx2.altibox.net. NS
Answer
The response has no answer records.
Authority
altibox.net. 3600 SOA ns1.altibox.net. root.lyse.net. 2021073701 28800 7200 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0