rizzo.srt.com has no CNAME records.
Question and response
Question
dig rizzo.srt.com. NS
Answer
The response has no answer records.
Authority
srt.com. 9594 SOA ns.minot.com. webmaster.srt.com. 2019060995 10800 3600 10800 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0