Apex domains cannot have CNAME records.
Question and response
Question
dig servereasy.it. NS
Answer
servereasy.it. 3 NS lewis.ns.cloudflare.com.
servereasy.it. 3 NS carioca.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
lewis.ns.cloudflare.com. 5 A 108.162.195.159
lewis.ns.cloudflare.com. 5 A 162.159.44.159
lewis.ns.cloudflare.com. 5 A 172.64.35.159
carioca.ns.cloudflare.com. 5 A 108.162.194.20
carioca.ns.cloudflare.com. 5 A 162.159.38.20
carioca.ns.cloudflare.com. 5 A 172.64.34.20
lewis.ns.cloudflare.com. 5 AAAA 2606:4700:58:0:0:0:a29f:2c9f
lewis.ns.cloudflare.com. 5 AAAA 2803:f800:50:0:0:0:6ca2:c39f
lewis.ns.cloudflare.com. 5 AAAA 2a06:98c1:50:0:0:0:ac40:239f
carioca.ns.cloudflare.com. 5 AAAA 2606:4700:50:0:0:0:a29f:2614
carioca.ns.cloudflare.com. 5 AAAA 2803:f800:50:0:0:0:6ca2:c214
carioca.ns.cloudflare.com. 5 AAAA 2a06:98c1:50:0:0:0:ac40:2214
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0