Apex domains cannot have CNAME records.
Question and response
Question
dig ecircle.com. NS
Answer
ecircle.com. 5 NS ns1.ecircle.de.
ecircle.com. 5 NS ns3.ecircle.com.
ecircle.com. 5 NS ns2.ecircle.de.
Authority
The response has no authority records.
Additional
ns3.ecircle.com. 5 A 91.192.40.21
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0