Apex domains cannot have CNAME records.
Question and response
Question
dig hostinger.com. NS
Answer
hostinger.com. 5 NS any2.hostinger.com.
hostinger.com. 5 NS any1.hostinger.com.
Authority
The response has no authority records.
Additional
any1.hostinger.com. 5 A 162.159.24.189
any2.hostinger.com. 5 A 162.159.25.21
any1.hostinger.com. 5 AAAA 2400:cb00:2049:1:0:0:a29f:18bd
any2.hostinger.com. 5 AAAA 2400:cb00:2049:1:0:0:a29f:1915
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0