smtp2.educando.edu.do has no NS records.
NS records for this zone are defined at edu.do.
NS records for this zone are defined at edu.do.
Question and response
Question
dig smtp2.educando.edu.do. NS
Answer
The response has no answer records.
Authority
educando.edu.do. 3417 SOA ns1-06.azure-dns.com. hostmaster. 88 900 600 86400 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0