vrt.combrcloud.com.br has no NS records.
NS records for this zone are defined at combrcloud.com.br.
NS records for this zone are defined at combrcloud.com.br.
Question and response
Question
dig vrt.combrcloud.com.br. NS
Answer
The response has no answer records.
Authority
combrcloud.com.br. 1800 SOA justin.ns.cloudflare.com. dns.cloudflare.com. 2396420860 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0