Apex domains cannot have CNAME records.
Question and response
Question
dig tsumra.org. NS
Answer
tsumra.org. 5 NS ns-1411.awsdns-48.org.
tsumra.org. 5 NS ns-846.awsdns-41.net.
tsumra.org. 5 NS ns-843.awsdns-41.net.
tsumra.org. 5 NS ns-2013.awsdns-59.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0