ispcb.isphost.net has no CNAME records.
Question and response
Question
dig ispcb.isphost.net. NS
Answer
The response has no answer records.
Authority
isphost.net. 3553 SOA ispns1.arvid.ee. root.arvid.ee. 2024101202 7200 540 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0