cp.serverdata.net.cdn.cloudflare.net has no CNAME records.
Question and response
Question
dig cp.serverdata.net.cdn.cloudflare.net. NS
Answer
The response has no answer records.
Authority
cloudflare.net. 741 SOA ns1.cloudflare.net. dns.cloudflare.com. 2396714781 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0