relay.m247.com has no CNAME records.
Question and response
Question
dig relay.m247.com. NS
Answer
The response has no answer records.
Authority
m247.com. 1800 SOA dorthy.ns.cloudflare.com. dns.cloudflare.com. 2396617649 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0