Apex domains cannot have CNAME records.
Question and response
Question
dig pbc.ps. NS
Answer
pbc.ps. 5 NS karsyn.ns.cloudflare.com.
pbc.ps. 5 NS lennon.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0