Apex domains cannot have CNAME records.
Question and response
Question
dig scc-zip.net. NS
Answer
scc-zip.net. 5 NS ns1.scc-zip.net.
scc-zip.net. 5 NS ns2.scc-zip.net.
Authority
The response has no authority records.
Additional
ns1.scc-zip.net. 5 A 199.48.103.213
ns2.scc-zip.net. 5 A 199.48.101.213
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0