ISP's DNS server resolve test
dig pastebin.com
ISP's DNS taking queries by force test
Blocked websites hang test on TLS client hello on the DNS servers
curl -vik --resolve pastebin.com:443:1.1.1.1 <https://pastebin.com> -m 2
Blocked domain test on host header
curl -vik --header "Host: xvideos.com" 85.117.236.90
Blocked domain test on SNI
curl -vik --resolve xvideos.com:443:85.117.236.90 <https://xvideos.com>