_cluster1.common.truehostcloud.com has no CNAME records.
Question and response
Question
dig _cluster1.common.truehostcloud.com. NS
Answer
The response has no answer records.
Authority
truehostcloud.com. 1769 SOA hugh.ns.cloudflare.com. dns.cloudflare.com. 2397912496 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0