IPIP Address Lookup
IPv4reserved

198.51.100.1

Documentation and example address • Managed by IETF Documentation (TEST-NET-2, RFC 5737)

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

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Overview of 198.51.100.1

198.51.100.1 is reserved by RFC 5737 as part of TEST-NET-2 for technical documentation and educational book examples without polluting public internet routing tables.

Classification & Technical Details

  • Protocol Version: IPv4
  • Address Classification: RESERVED (Non-routable / Local Interface)
  • Managing Authority / Registry: IETF Documentation (TEST-NET-2, RFC 5737)

Routing and Operational Purpose

The IP 198.51.100.1 is designated for Documentation and example address. 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.