Apex domains cannot have CNAME records.
Question and response
Question
dig hitrost.com. NS
Answer
hitrost.com. 5 NS dns5.hitrost.com.
hitrost.com. 5 NS dns3.hitrost.net.
hitrost.com. 5 NS dns2.hitrost.net.
hitrost.com. 5 NS dns1.hitrost.net.
hitrost.com. 5 NS dns4.hitrost.net.
Authority
The response has no authority records.
Additional
dns1.hitrost.net. 5 A 91.185.211.2
dns1.hitrost.net. 5 A 185.69.148.2
dns1.hitrost.net. 5 A 185.69.149.2
dns2.hitrost.net. 5 A 198.251.90.169
dns2.hitrost.net. 5 A 198.251.90.235
dns3.hitrost.net. 5 A 149.202.47.120
dns4.hitrost.net. 5 A 51.68.175.51
dns5.hitrost.com. 5 A 185.69.149.2
dns1.hitrost.net. 5 AAAA 2001:41d0:701:1100:0:0:0:75db
dns2.hitrost.net. 5 AAAA 2001:41d0:401:3200:0:0:0:3cf8
dns3.hitrost.net. 5 AAAA 2001:41d0:401:3200:0:0:0:3cf8
dns4.hitrost.net. 5 AAAA 2001:41d0:701:1100:0:0:0:75db
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0