mx0.uniserve.com has no NS records.
NS records for this zone are defined at uniserve.com.
NS records for this zone are defined at uniserve.com.
Question and response
Question
dig mx0.uniserve.com. NS
Answer
The response has no answer records.
Authority
uniserve.com. 3299 SOA domains1.uniserve.com. dns-admin.uniserve.com. 2026021800 7200 1800 604800 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0