Apex domains cannot have CNAME records.
Question and response
Question
dig nuthost.com. NS
Answer
nuthost.com. 1 NS nut2.nuthost.com.
nuthost.com. 1 NS nut1.nuthost.com.
Authority
The response has no authority records.
Additional
nut1.nuthost.com. 1 A 167.250.4.4
nut2.nuthost.com. 1 A 158.69.231.253
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0