spamfilter02.concilig.com.br has no NS records.
NS records for this zone are defined at concilig.com.br.
NS records for this zone are defined at concilig.com.br.
Question and response
Question
dig spamfilter02.concilig.com.br. NS
Answer
The response has no answer records.
Authority
concilig.com.br. 1800 SOA arch.ns.cloudflare.com. dns.cloudflare.com. 2398314183 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0