relay.corehr.com has no CNAME records.
Question and response
Question
dig relay.corehr.com. NS
Answer
The response has no answer records.
Authority
corehr.com. 1073 SOA leonidas.ns.cloudflare.com. dns.cloudflare.com. 2397349455 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0