smtpcrm.algartelecom.com.br has no NS records.
NS records for this zone are defined at algartelecom.com.br.
NS records for this zone are defined at algartelecom.com.br.
Question and response
Question
dig smtpcrm.algartelecom.com.br. NS
Answer
The response has no answer records.
Authority
algartelecom.com.br. 1800 SOA tricia.ns.cloudflare.com. dns.cloudflare.com. 2398639572 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0