Apex domains cannot have CNAME records.
Question and response
Question
dig LF.net. NS
Answer
lf.net. 1 NS dns3.lf.net.
lf.net. 1 NS dns1.lf.net.
lf.net. 1 NS dns2.lf.net.
Authority
The response has no authority records.
Additional
dns1.lf.net. 1 A 212.9.160.10
dns2.lf.net. 1 A 62.50.111.2
dns3.lf.net. 1 A 213.178.170.2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0