srv.ddm.adv.br has no CNAME records.
Question and response
Question
dig srv.ddm.adv.br. NS
Answer
The response has no answer records.
Authority
ddm.adv.br. 10800 SOA ns1.ddm.adv.br. jissa2.gmail.com. 2026011301 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0