david.siemens.com has no CNAME records.
Question and response
Question
dig david.siemens.com. NS
Answer
The response has no answer records.
Authority
siemens.com. 300 SOA a1-16.akam.net. hostmaster.siemens.com. 2026022631 3600 600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0