Apex domains cannot have CNAME records.
Question and response
Question
dig life. NS
Answer
life. 5 NS v2n1.nic.life.
life. 5 NS v0n0.nic.life.
life. 5 NS v0n1.nic.life.
life. 5 NS v0n2.nic.life.
life. 5 NS v0n3.nic.life.
life. 5 NS v2n0.nic.life.
Authority
The response has no authority records.
Additional
v0n0.nic.life. 172800 A 65.22.20.35
v0n1.nic.life. 105832 A 65.22.21.35
v0n2.nic.life. 105832 A 65.22.22.35
v0n3.nic.life. 105832 A 161.232.10.35
v2n0.nic.life. 105832 A 65.22.23.35
v2n1.nic.life. 105832 A 161.232.11.35
v0n0.nic.life. 172800 AAAA 2a01:8840:16:0:0:0:0:35
v0n1.nic.life. 105832 AAAA 2a01:8840:17:0:0:0:0:35
v0n2.nic.life. 105832 AAAA 2a01:8840:18:0:0:0:0:35
v0n3.nic.life. 105832 AAAA 2a01:8840:f4:0:0:0:0:35
v2n0.nic.life. 105832 AAAA 2a01:8840:19:0:0:0:0:35
v2n1.nic.life. 105832 AAAA 2a01:8840:f5:0:0:0:0:35
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0