mx1.prewise.com has no NS records.
NS records for this zone are defined at prewise.com.
NS records for this zone are defined at prewise.com.
Question and response
Question
dig mx1.prewise.com. NS
Answer
The response has no answer records.
Authority
prewise.com. 3600 SOA ns1.prewise.com. hostmaster.prewise.com. 2025022701 1200 600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0