Apex domains cannot have CNAME records.
Question and response
Question
dig ftr.com. NS
Answer
ftr.com. 1 NS auth.asbn.va.frontiernet.net.
ftr.com. 1 NS auth.roch.ny.frontiernet.net.
ftr.com. 1 NS auth.frontiernet.net.
ftr.com. 1 NS a1-204.akam.net.
ftr.com. 1 NS a13-67.akam.net.
Authority
The response has no authority records.
Additional
auth.asbn.va.frontiernet.net. 1 A 74.46.42.179
auth.roch.ny.frontiernet.net. 1 A 50.48.212.201
auth.frontiernet.net. 1 A 74.40.74.20
auth.asbn.va.frontiernet.net. 1 AAAA 2001:1960:20:2030:400:0:0:179
auth.roch.ny.frontiernet.net. 1 AAAA 2001:1960:20:1030:400:0:0:201
auth.frontiernet.net. 1 AAAA 2001:1960:0:0:0:0:0:20
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0