sns.tinet.net has no CNAME records.
Question and response
Question
dig sns.tinet.net. NS
Answer
The response has no answer records.
Authority
tinet.net. 9606 SOA pns.tinet.net. netguard.tinet.net. 2022011400 43200 14400 2419200 172800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0