mail.systec-co.net has no NS records.
NS records for this zone are defined at systec-co.net.
NS records for this zone are defined at systec-co.net.
Question and response
Question
dig mail.systec-co.net. NS
Answer
The response has no answer records.
Authority
systec-co.net. 3600 SOA ns1.systec-co.net. root.systec-co.net. 2025081215 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0