Apex domains cannot have CNAME records.
Question and response
Question
dig network. NS
Answer
network. 5 NS v2n0.nic.network.
network. 5 NS v0n3.nic.network.
network. 5 NS v0n0.nic.network.
network. 5 NS v0n2.nic.network.
network. 5 NS v0n1.nic.network.
network. 5 NS v2n1.nic.network.
Authority
The response has no authority records.
Additional
v0n0.nic.network. 87977 A 65.22.32.36
v0n1.nic.network. 172697 A 65.22.33.36
v0n2.nic.network. 154544 A 65.22.34.36
v0n3.nic.network. 172697 A 161.232.16.36
v2n0.nic.network. 154544 A 65.22.35.36
v2n1.nic.network. 154544 A 161.232.17.36
v0n0.nic.network. 87977 AAAA 2a01:8840:22:0:0:0:0:36
v0n1.nic.network. 172697 AAAA 2a01:8840:23:0:0:0:0:36
v0n2.nic.network. 154544 AAAA 2a01:8840:24:0:0:0:0:36
v0n3.nic.network. 172697 AAAA 2a01:8840:fa:0:0:0:0:36
v2n0.nic.network. 154544 AAAA 2a01:8840:25:0:0:0:0:36
v2n1.nic.network. 154544 AAAA 2a01:8840:fb:0:0:0:0:36
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0