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