Public DNS Servers (Resolvers)

While writing my blog post series about IPv6, I realized it would be useful to document publicly available DNS servers. 

In this blog post I will documente DNS IP addresses of DNS Servers from Google, Clouflare, Quad9, Cisco's OpenDNS.

There are weel know IPv4 DNS addresses like 8.8.8.8  and 8.8.4.4, but there are others. DNS Servers are nowadays very usefull for secuurity protection like Phishing Protection, Optional content filtering, etc.

And last but not least, do you know IPv6 addresses of those DNS services.

Google's Public DNS Servers

Everybody know Google these days, right?

Primary IPv6: 2001:4860:4860::8888

Primary IPv4: 8.8.8.8 

Secondary IPv6: 2001:4860:4860::8844

Secondary IPv4: 8.8.4.4

Cloudflare's Public DNS Servers

Cloudflare is a U.S. based technology company that provides a suite of services to enhance website performance, security, and reliability. CDN (Content Delivery Network), Security, Performance, Networking and DNS.

Cloudflare is leveraging Knot DNS High Performance DNS Server developed by CZ.NIC here in Czechia.

Standard DNS Servers

Primary IPv6: 2606:4700:4700::1111

Primary IPv4: 1.1.1.1

Secondary IPv6: 2606:4700:4700::1001 

Secondary IPv4: 1.0.0.1

Malware Blocking

Primary IPv6: 2606:4700:4700::1112 

Primary IPv4: 1.1.1.2

Secondary IPv6: 2606:4700:4700::1002

Secondary IPv4: 1.0.0.2

Malware and Adult Blocking

Primary IPv6: 2606:4700:4700::1113

Primary IPv4: 1.1.1.3

Secondary IPv6: 2606:4700:4700::1003

Secondary IPv6: 1.0.0.3

 

Quad9's public DNS servers

Quad9 is a non-profit organization focused on security and privacy in DNS resolution.

Secure DNS Servers

Primary IPv6: 2620:fe::fe

Primary IPv4: 9.9.9.9

Secondary IPv6: 2620:fe::9

Secondary IPv4: 149.112.112.112

Secure DNS Servers + ECS-enabled (for CDNs)

Primary IPv6:  2620:fe::11

Primary IPv4:  9.9.9.11
Secondary IPv6: 2620:fe::fe:11

Secondary IPv4: 149.112.112.11

Unsecured DNS (No filtering)

Primary IPv6: 2620:fe::10

Primary IPv4: 9.9.9.10

Secondary IPv6: 2620:fe::fe:10

Secondary IPv4: 149.112.112.10

Cisco's OpenDNS public DNS servers

All my readers probably know Cisco. OpenDNS provide Phishing protection, Optional content filtering, and DNSCrypt support

Secure DNS Servers

Primary IPv6: 2620:119:35::35

Primary IPv4: 208.67.222.222

Secondary IPv6: 2620:119:53::53

Secondary IPv4: 208.67.220.220

 

Others

• CleanBrowsing
• AdGuard DNS
• Neustar UltraDNS (formerly Verisign DNS)
• DNS.SB (by SecureBit)
• Yandex.DNS
• etc.