mail.supremecenter.com has no NS records.
NS records for this zone are defined at supremecenter.com.
NS records for this zone are defined at supremecenter.com.
Question and response
Question
dig mail.supremecenter.com. NS
Answer
The response has no answer records.
Authority
supremecenter.com. 1800 SOA supremecenter.com. root.supremecenter.com. 1702389678 28800 7200 604800 86400
Additional
. 0 OPT ; payload 600, xrcode 0, version 0, flags 0