pirx.digi.pl has no CNAME records.
Question and response
Question
dig pirx.digi.pl. NS
Answer
The response has no answer records.
Authority
digi.pl. 2816 SOA max.digi.pl. admin.pirxnet.pl. 2026012903 21600 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0