Apex domains cannot have CNAME records.
Question and response
Question
dig a004.g.jpt1.static.cnode.io. NS
Answer
a004.g.jpt1.static.cnode.io. 5 NS ns-a3.conoha.io.
a004.g.jpt1.static.cnode.io. 5 NS ns-a1.conoha.io.
a004.g.jpt1.static.cnode.io. 5 NS ns-a2.conoha.io.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0