proton.s-net.ro has no CNAME records.
Question and response
Question
dig proton.s-net.ro. NS
Answer
The response has no answer records.
Authority
s-net.ro. 1224 SOA ns1.s-net.ro. vona.s-net.ro. 2024050624 28800 7200 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0