rosa.smithville.com has no CNAME records.
Question and response
Question
dig rosa.smithville.com. NS
Answer
The response has no answer records.
Authority
smithville.com. 3600 SOA as1.bluemarble.net. hostmaster.bluemarble.net. 2026021707 7200 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0