ns3.sap.com has no CNAME records.
Question and response
Question
dig ns3.sap.com. NS
Answer
The response has no answer records.
Authority
sap.com. 600 SOA ns.sap-ag.de. dns.sap-ag.de. 2026021801 14400 5400 1814400 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0