https://nip.io/

https://domainwat.ch/

https://transparencyreport.google.com/https/certificates

https://crt.sh/

ローカルキャッシュ削除

uname | grep Darwin 2>&1 >/dev/null && sudo killall -HUP mDNSResponder

https://1.1.1.1/

https://developers.google.com/speed/public-dns/

https://www.nslookup.io/