owa020.serverdata.net has no CNAME records.
Question and response
Question
dig owa020.serverdata.net. NS
Answer
The response has no answer records.
Authority
serverdata.net. 3491 SOA ns2.serverdata.net. hostmaster.serverdata.net. 2026030727 3600 1800 1814400 3601
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0