cloud3.triara.com has no CNAME records.
Question and response
Question
dig cloud3.triara.com. NS
Answer
The response has no answer records.
Authority
triara.com. 408 SOA dns1.triara.com. webmaster.triara.com. 2018092361 7200 7200 604800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0