Apex domains cannot have CNAME records.
Question and response
Question
dig ps.net. NS
Answer
ps.net. 5 NS nsptc.ps.net.
ps.net. 5 NS nsntc.ps.net.
Authority
The response has no authority records.
Additional
nsntc.ps.net. 5 A 148.9.100.9
nsptc.ps.net. 5 A 160.109.162.30
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0