mt31.loudclick.net has no CNAME records.
Question and response
Question
dig mt31.loudclick.net. NS
Answer
The response has no answer records.
Authority
loudclick.net. 1346 SOA ivan.ns.cloudflare.com. dns.cloudflare.com. 2398626582 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0