cpanel.ceph.ioflood.com has no CNAME records.
Question and response
Question
dig cpanel.ceph.ioflood.com. NS
Answer
The response has no answer records.
Authority
ioflood.com. 1800 SOA candy.ns.cloudflare.com. dns.cloudflare.com. 2398066060 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0