sp1.powerhost.bg has no CNAME records.
Question and response
Question
dig sp1.powerhost.bg. NS
Answer
The response has no answer records.
Authority
powerhost.bg. 4566 SOA ns2.cloud-9d9a1e.managed-vps.net. support.holhost.com. 2025120469 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0