efa.limes.com.pl has no CNAME records.
Question and response
Question
dig efa.limes.com.pl. NS
Answer
The response has no answer records.
Authority
limes.com.pl. 7200 SOA jupiter.limes.com.pl. hostmaster.limes.com.pl. 2026010902 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0