Apex domains cannot have CNAME records.
Question and response
Question
dig nle1.net. NS
Answer
nle1.net. 4 NS ns2.nle1.net.
nle1.net. 4 NS ns.nle1.net.
nle1.net. 4 NS ns3.nle1.net.
Authority
The response has no authority records.
Additional
ns.nle1.net. 4 A 50.59.140.3
ns2.nle1.net. 4 A 170.75.145.153
ns3.nle1.net. 4 A 216.224.129.163
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0