mx.santodomingo.gov.do has no NS records.
NS records for this zone are defined at santodomingo.gov.do.
NS records for this zone are defined at santodomingo.gov.do.
Question and response
Question
dig mx.santodomingo.gov.do. NS
Answer
The response has no answer records.
Authority
santodomingo.gov.do. 3600 SOA ns1.yourwebhosting.com. dnsadmin.yourwebhosting.com. 2014030935 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0