Apex domains cannot have CNAME records.
Question and response
Question
dig niagahoster.com. NS
Answer
niagahoster.com. 5 NS dns1.hostinger.com.
niagahoster.com. 5 NS dns2.hostinger.com.
Authority
The response has no authority records.
Additional
dns1.hostinger.com. 5 A 198.41.223.130
dns2.hostinger.com. 5 A 162.159.10.188
dns1.hostinger.com. 5 AAAA 2400:cb00:2049:1:0:0:0:c629
dns2.hostinger.com. 5 AAAA 2400:cb00:2049:1:0:0:a29f:abc
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0