shellcode.energis.pl has no CNAME records.
Question and response
Question
dig shellcode.energis.pl. NS
Answer
The response has no answer records.
Authority
energis.pl. 6269 SOA ns1.ikp.pl. hostmaster.ikp.pl. 2025022500 3600 1800 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0