mx.capitalstar.biz has no NS records.
NS records for this zone are defined at capitalstar.biz.
NS records for this zone are defined at capitalstar.biz.
Question and response
Question
dig mx.capitalstar.biz. NS
Answer
The response has no answer records.
Authority
capitalstar.biz. 3600 SOA dns.capitalstar.biz. hostmaster.capitalstar.biz. 1252230404 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0