mx7.name.com has no NS records.
NS records for this zone are defined at name.com.
NS records for this zone are defined at name.com.
Question and response
Question
dig mx7.name.com. NS
Answer
The response has no answer records.
Authority
name.com. 1800 SOA margaret.ns.cloudflare.com. dns.cloudflare.com. 2397154212 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0