mx.threebrothersflooring.com has no NS records.
NS records for this zone are defined at threebrothersflooring.com.
NS records for this zone are defined at threebrothersflooring.com.
Question and response
Question
dig mx.threebrothersflooring.com. NS
Answer
The response has no answer records.
Authority
threebrothersflooring.com. 3600 SOA dns.threebrothersflooring.com. hostmaster.threebrothersflooring.com. 1581810056 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0