Apex domains cannot have CNAME records.
Question and response
Question
dig software. NS
Answer
software. 5 NS v2n1.nic.software.
software. 5 NS v0n3.nic.software.
software. 5 NS v0n1.nic.software.
software. 5 NS v0n0.nic.software.
software. 5 NS v0n2.nic.software.
software. 5 NS v2n0.nic.software.
Authority
The response has no authority records.
Additional
v0n0.nic.software. 144844 A 65.22.32.10
v0n1.nic.software. 144844 A 65.22.33.10
v0n2.nic.software. 144844 A 65.22.34.10
v0n3.nic.software. 144844 A 161.232.16.10
v2n0.nic.software. 144844 A 65.22.35.10
v2n1.nic.software. 144844 A 161.232.17.10
v0n0.nic.software. 144844 AAAA 2a01:8840:22:0:0:0:0:10
v0n1.nic.software. 144844 AAAA 2a01:8840:23:0:0:0:0:10
v0n2.nic.software. 144844 AAAA 2a01:8840:24:0:0:0:0:10
v0n3.nic.software. 144844 AAAA 2a01:8840:fa:0:0:0:0:10
v2n0.nic.software. 144844 AAAA 2a01:8840:25:0:0:0:0:10
v2n1.nic.software. 144844 AAAA 2a01:8840:fb:0:0:0:0:10
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0