Apex domains cannot have CNAME records.
Question and response
Question
dig avalon.net. NS
Answer
avalon.net. 5 NS ns2.lightedge.com.
avalon.net. 5 NS ns1.lightedge.com.
avalon.net. 5 NS ns3.lightedge.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0