mx1.intercityhoteis.com.br has no NS records.
NS records for this zone are defined at intercityhoteis.com.br.
NS records for this zone are defined at intercityhoteis.com.br.
Question and response
Question
dig mx1.intercityhoteis.com.br. NS
Answer
The response has no answer records.
Authority
intercityhoteis.com.br. 3600 SOA ns1-01.azure-dns.com. hostmaster.intercityhoteis.com.br. 2025121101 21600 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0