Apex domains cannot have CNAME records.
Question and response
Question
dig spamjadoo.com. NS
Answer
spamjadoo.com. 3 NS ns1.dildns.com.
spamjadoo.com. 3 NS ns2.dildns.com.
Authority
The response has no authority records.
Additional
ns1.dildns.com. 3 A 202.157.87.68
ns2.dildns.com. 3 A 202.157.83.3
ns2.dildns.com. 3 AAAA 2402:8c00:0:1:0:0:0:3
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0