dns-frepms.stackhero.io has no CNAME records.
Question and response
Question
dig dns-frepms.stackhero.io. NS
Answer
The response has no answer records.
Authority
stackhero.io. 185 SOA dina.ns.cloudflare.com. dns.cloudflare.com. 2396755090 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0