antispam.unitelco.com.br has no NS records.
NS records for this zone are defined at unitelco.com.br.
NS records for this zone are defined at unitelco.com.br.
Question and response
Question
dig antispam.unitelco.com.br. NS
Answer
The response has no answer records.
Authority
unitelco.com.br. 3600 SOA dns1.univ.com.br. hostmaster.unitelco.com.br. 2026030200 3600 1800 1209600 3600
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0