mx1.completeuc.com has no NS records.
NS records for this zone are defined at completeuc.com.
NS records for this zone are defined at completeuc.com.
Question and response
Question
dig mx1.completeuc.com. NS
Answer
The response has no answer records.
Authority
completeuc.com. 3600 SOA ns01.momentumtelecom.com. systems.momentumtelecom.com. 2025032100 3600 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0