mail.hadcloud.srv.br has no NS records.
NS records for this zone are defined at hadcloud.srv.br.
NS records for this zone are defined at hadcloud.srv.br.
Question and response
Question
dig mail.hadcloud.srv.br. NS
Answer
The response has no answer records.
Authority
hadcloud.srv.br. 900 SOA kiki.bunny.net. hostmaster.bunny.net. 2021690365 7200 900 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0