mail.contisystems.pt has no NS records.
NS records for this zone are defined at contisystems.pt.
NS records for this zone are defined at contisystems.pt.
Question and response
Question
dig mail.contisystems.pt. NS
Answer
The response has no answer records.
Authority
contisystems.pt. 300 SOA dns18.ovh.net. tech.ovh.net. 2026022600 86400 3600 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0