www.g2server.pl has no CNAME records.
Question and response
Question
dig www.g2server.pl. NS
Answer
The response has no answer records.
Authority
g2server.pl. 1108 SOA ns1.geetoo.com. hostmaster.geetoo.com. 20181182 1200 600 1209600 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0