IPIP Address Lookup
IPv4reserved

100.64.0.1

Shared address space for CGNAT • Managed by Carrier-Grade NAT (RFC 6598)

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

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Overview of 100.64.0.1

100.64.0.1 lies inside the 100.64.0.0/10 block reserved for Carrier-Grade NAT (CGNAT) by telecom operators, allowing ISPs to multiplex residential connections behind pooled public IPs.

Classification & Technical Details

  • Protocol Version: IPv4
  • Address Classification: RESERVED (Non-routable / Local Interface)
  • Managing Authority / Registry: Carrier-Grade NAT (RFC 6598)

Routing and Operational Purpose

The IP 100.64.0.1 is designated for Shared address space for CGNAT. 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.