Apex domains cannot have CNAME records.
Question and response
Question
dig sc2000.net. NS
Answer
sc2000.net. 5 NS ns2.sc2000.net.
sc2000.net. 5 NS ns1.sc2000.net.
Authority
The response has no authority records.
Additional
ns1.sc2000.net. 5 A 64.88.192.20
ns2.sc2000.net. 5 A 64.88.192.21
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0