nsg1.namebrightdns.com has no CNAME records.
Question and response
Question
dig nsg1.namebrightdns.com. NS
Answer
The response has no answer records.
Authority
namebrightdns.com. 1800 SOA chuck.ns.cloudflare.com. dns.cloudflare.com. 2398575796 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0