Are you using Quad9 DNS
to check if you are using Quad9 DNS (primary DNS: 9.9.9.9, secondary DNS: 149.112.112.112), just visit this url from Quad9: https://on.quad9.net/.
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Just anothe IT blog
to check if you are using Quad9 DNS (primary DNS: 9.9.9.9, secondary DNS: 149.112.112.112), just visit this url from Quad9: https://on.quad9.net/.