Apex domains cannot have CNAME records.
Question and response
Question
dig fidnet.com. NS
Answer
fidnet.com. 5 NS rolla.hwy66.com.
fidnet.com. 5 NS ns3.fidnet.com.
fidnet.com. 5 NS sullivan.hwy66.com.
fidnet.com. 5 NS ns2.fidnet.com.
fidnet.com. 5 NS ns1.fidnet.com.
Authority
The response has no authority records.
Additional
ns3.fidnet.com. 5 A 216.229.74.9
rolla.hwy66.com. 5 A 216.229.73.9
sullivan.hwy66.com. 5 A 216.229.72.9
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0