Apex domains cannot have CNAME records.
Question and response
Question
dig windstreambiz.net. NS
Answer
windstreambiz.net. 5 NS cns01.windstream.net.
windstreambiz.net. 5 NS cns04.windstream.net.
windstreambiz.net. 5 NS cns03.windstream.net.
windstreambiz.net. 5 NS cns02.windstream.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0