Apex domains cannot have CNAME records.
Question and response
Question
dig parabolanet.com. NS
Answer
parabolanet.com. 5 NS ns1.parabolanet.com.
parabolanet.com. 5 NS ns2.parabolanet.com.
Authority
The response has no authority records.
Additional
ns1.parabolanet.com. 5 A 217.17.107.6
ns2.parabolanet.com. 5 A 217.17.107.7
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0