_acme-challenge.firma.sofia.sk has no CNAME records.
Question and response
Question
dig _acme-challenge.firma.sofia.sk. NS
Answer
The response has no answer records.
Authority
sofia.sk. 3263 SOA ns1.forma.sk. root.forma.sk. 2024102102 3600 10800 3600000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0