mail-mta-prod-0.itcsa.net has no NS records.
NS records for this zone are defined at itcsa.net.
NS records for this zone are defined at itcsa.net.
Question and response
Question
dig mail-mta-prod-0.itcsa.net. NS
Answer
The response has no answer records.
Authority
itcsa.net. 3600 SOA choique.itcsa.net. admin.itcsa.net. 2006060749 3600 600 86400 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0