IPIP Address Lookup
IPv4public

1.0.0.1

Cloudflare Public DNS secondary resolver • Managed by Cloudflare, Inc.

Profile updated: November 2026•Verified against IANA & RIR database allocations

Live Network Diagnostic

Try:
Your IP:

Overview of 1.0.0.1

1.0.0.1 serves as the secondary redundant IPv4 Anycast resolver address for Cloudflares 1.1.1.1 service, providing high availability for recursive name resolution.

Classification & Technical Details

  • Protocol Version: IPv4
  • Address Classification: PUBLIC (Globally Routable on BGP)
  • Managing Authority / Registry: Cloudflare, Inc.
  • Primary ASN: AS13335
  • Authoritative Reverse DNS (PTR): one.one.one.one

Routing and Operational Purpose

The IP 1.0.0.1 is designated for Cloudflare Public DNS secondary resolver. In modern networking, proper identification of such infrastructure nodes is essential for diagnosing traceroute latency, verifying forward-confirmed reverse DNS (FCrDNS), and establishing trustworthy security policies.