Why 1.1.1.1 Became the World’s Fastest Public DNS – History and Tech

In the internet world, some numeric addresses have special roles. While 127.0.0.1 is the loopback address and 8.8.8.8 is Google’s public DNS, 1.1.1.1 is a legendary IP address.

Many think it’s just an easy‑to‑remember IPv4 address, but its status is comparable to 8.8.8.8. It is a globally routable public IPv4 address, not a reserved block.

Which network block does 1.1.1.1 belong to?

IPv4 addresses consist of four decimal bytes (A.B.C.D). 1.1.1.1 is at the very start of the block.

It belongs to Class A address range 1.0.0.0 ~ 126.255.255.255.

It resides in the 1.0.0.0/8 network segment.

Is it a reserved address? No – it is a legal, globally routable public IPv4 address.

The entire 1.0.0.0/8 block was only allocated in 2010; before that it was unassigned, leading to its “legendary” history.

1.1.1.1’s past

Before 2010 the block was unassigned, and many devices used 1.1.1.1 as a “hand‑picked” address, resulting in a lot of “dirty traffic” when it finally became active.

When APNIC assigned the block to Cloudflare, many wondered why a “dirty” address was chosen for a public DNS.

1.1.1.1 becomes a public DNS

On April 1 2018, Cloudflare launched a public DNS service using 1.1.1.1 as the primary address and 1.0.0.1 as secondary.

Despite the April Fool’s Day launch, Cloudflare turned a previously abused address into a fast, privacy‑focused DNS.

Why choose 1.1.1.1?

Memorable – simpler than 8.8.8.8.

Historical significance – repurposing a widely abused address.

Collaboration with APNIC – Cloudflare operates the service while APNIC uses traffic for research.

Cloudflare’s commitments

Privacy first – no query logs, no data selling.

Speed – extensive Anycast deployment.

Security – supports DoH and DoT to prevent hijacking.

Comparison with other public DNS

Compared with Google’s 8.8.8.8 and Quad9’s 9.9.9.9, 1.1.1.1 ’s main selling point is “privacy + speed”.

Anycast and encrypted DNS

1. Anycast technology

Cloudflare’s 1.1.1.1 uses Anycast, meaning thousands of global nodes route queries to the nearest node, dramatically reducing latency.

2. Encrypted DNS

Traditional DNS is plaintext; 1.1.1.1 supports DNS over HTTPS (DoH) and DNS over TLS (DoT) for encrypted queries.

Even after cleanup, 1.1.1.1 still sees odd traffic from legacy devices, misconfigured networks, and some ISP interceptions, making its operation harder than 8.8.8.8.

Reviewing its history, 1.1.1.1 transformed from a “garbage‑bucket” address to a globally recognized public DNS that is fast, secure, and privacy‑centric.

The next time you type 1.1.1.1, remember the remarkable story behind it.