Apex domains cannot have CNAME records.
Question and response
Question
dig nic.services. NS
Answer
nic.services. 5 NS v2n1.nic.services.
nic.services. 5 NS v0n0.nic.services.
nic.services. 5 NS v0n1.nic.services.
nic.services. 5 NS v0n2.nic.services.
nic.services. 5 NS v0n3.nic.services.
nic.services. 5 NS v2n0.nic.services.
Authority
The response has no authority records.
Additional
v0n0.nic.services. 167153 A 65.22.20.37
v0n1.nic.services. 80901 A 65.22.21.37
v0n2.nic.services. 80901 A 65.22.22.37
v0n3.nic.services. 119446 A 161.232.10.37
v2n0.nic.services. 80901 A 65.22.23.37
v2n1.nic.services. 113273 A 161.232.11.37
v0n0.nic.services. 167153 AAAA 2a01:8840:16:0:0:0:0:37
v0n1.nic.services. 80901 AAAA 2a01:8840:17:0:0:0:0:37
v0n2.nic.services. 80901 AAAA 2a01:8840:18:0:0:0:0:37
v0n3.nic.services. 119446 AAAA 2a01:8840:f4:0:0:0:0:37
v2n0.nic.services. 80901 AAAA 2a01:8840:19:0:0:0:0:37
v2n1.nic.services. 113273 AAAA 2a01:8840:f5:0:0:0:0:37
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0