server.systemna.com has no CNAME records.
Question and response
Question
dig server.systemna.com. NS
Answer
The response has no answer records.
Authority
systemna.com. 533 SOA ns1.144-76-219-202.cprapid.com. root.144-76-219-202.cprapid.com. 2026020301 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0