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README.md

Domain Name System (DNS) (a.k.a Domain Name Service or Domain Name Server)

Links

Glossary

  • DNS over HTTPS (DoH)
  • Internet Service Provider (ISP)
  • Time to Live (TTL)

Tools

Best Free & Public DNS Servers

Provider Primary DNS Secondary DNS
Google 8.8.8.8 8.8.4.4
Quad9 9.9.9.9 149.112.112.112
OpenDNS Home 208.67.222.222 208.67.220.220
Cloudflare 1.1.1.1 1.0.0.1
CleanBrowsing 185.228.168.9 185.228.169.9
Alternate DNS 76.76.19.19 76.223.122.150
AdGuard DNS 94.140.14.14 94.140.15.15

Resource Record

Name Description
CNAME Canonical Name
MX Mail Exchange

Tips

Flush DNS Cache

# Darwin (macOS)
sudo killall -HUP mDNSResponder
sudo killall mDNSResponderHelper
sudo dscacheutil -flushcache

Get Current DNS

#
grep nameserver <(scutil --dns)

#
cat /etc/resolv.conf

Set DNS

#
sudo networksetup -setdnsservers Wi-Fi 9.9.9.9