1.1.1.1

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1.1.1.1 is a free Domain Name System (DNS) service. The public DNS service and servers are maintained and owned by Cloudflare in partnership with APNIC. The service functions as a recursive name server providing domain name resolution for any host on the Internet. The service was announced on 1 April 2018, and is claimed by Cloudflare to be "the Internet's fastest, privacy-first consumer DNS service".

Video 1.1.1.1

Service

1.1.1.1 DNS operates recursive name servers for public use at the two following IP addresses: 1.1.1.1 and 1.0.0.1 for IPv4 service, as well as 2606:4700:4700::1111 and 2606:4700:4700::1001, for IPv6 access. The addresses are mapped to the nearest operational server by anycast routing.

The service is also available from the dns4torpnlfs2ifuz2s2yf3fc7rdmsbhm6rw75euj35pac6ap25zgqad.onion ^{(Accessing link help)} address for Tor clients.

Maps 1.1.1.1

Criticism and problems

Technological websites noted that by using 1.1.1.1 as the IP address for their service, Cloudflare created problems with existing setups that did not follow internet standards (such as RFC1918). While 1.1.1.1 was not a reserved IP address, it was and is used by many existing routers (mostly those sold by Cisco Systems) and companies for hosting login pages to private networks, exit pages or other purposes, rendering the use of 1.1.1.1 as a manually configured DNS server impossible on those systems. Additionally, 1.1.1.1 is blocked on many networks and by multiple ISPs because the simplicity of the address means that it was previously often used for testing purposes and not legitimate use. These previous uses have led to a huge influx of garbage data to Cloudflare's servers.

How to setup Cloudflare DNS (1.1.1.1) - (1.0.0.1) on PS4 (HD ...

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Cleanup of 1.1.1.1 and 1.0.0.1

The 1.0.0.0/8 IP block was assigned in 2010 to APNIC; before this time it was unassigned space. An unassigned IP space, however is not the same as a reserved IP space for private use (called a Reserved IP address). For example, AT&T has stated they are working on fixing this CPE issue within their CPE hardware.