Apex domains cannot have CNAME records.
Question and response
Question
dig klundrovex.com. NS
Answer
klundrovex.com. 5 NS ns2.klundrovex.com.
klundrovex.com. 5 NS ns1.klundrovex.com.
Authority
The response has no authority records.
Additional
ns1.klundrovex.com. 5 A 51.68.197.226
ns2.klundrovex.com. 5 A 51.195.180.4
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0