Apex domains cannot have CNAME records.
Question and response
Question
dig works. NS
Answer
works. 5 NS v0n2.nic.works.
works. 5 NS v0n3.nic.works.
works. 5 NS v2n0.nic.works.
works. 5 NS v2n1.nic.works.
works. 5 NS v0n0.nic.works.
works. 5 NS v0n1.nic.works.
Authority
The response has no authority records.
Additional
v0n0.nic.works. 167474 A 65.22.24.6
v0n1.nic.works. 137238 A 65.22.25.6
v0n2.nic.works. 167474 A 65.22.26.6
v0n3.nic.works. 137238 A 161.232.12.6
v2n0.nic.works. 137238 A 65.22.27.6
v2n1.nic.works. 137238 A 161.232.13.6
v0n0.nic.works. 167474 AAAA 2a01:8840:1a:0:0:0:0:6
v0n1.nic.works. 137238 AAAA 2a01:8840:1b:0:0:0:0:6
v0n2.nic.works. 167474 AAAA 2a01:8840:1c:0:0:0:0:6
v0n3.nic.works. 137238 AAAA 2a01:8840:f6:0:0:0:0:6
v2n0.nic.works. 137238 AAAA 2a01:8840:1d:0:0:0:0:6
v2n1.nic.works. 137238 AAAA 2a01:8840:f7:0:0:0:0:6
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0