network-v1/registry-ips/192-000-000-171--32--iana-special.md

192.0.0.171/32 — NAT64/DNS64 Discovery

Who is this IP range?

IANA identifies 192.0.0.171/32 as NAT64/DNS64 Discovery special-purpose IPv4 space. This is a protocol or standards classification, not an assertion that one company owns or operates every address in the range.

Special-purpose properties

• Range: 192.0.0.171/32
• Name: NAT64/DNS64 Discovery
• RFC/reference: [RFC8880][RFC7050], Section 2.2
• Allocation date: 2013-02
• Termination date: N/A
• Valid as source: False
• Valid as destination: False
• Forwardable: False
• Globally reachable: False
• Reserved by protocol: True
• Checked: 2026-07-22

Interpretation

The properties above are copied from the authoritative IANA special-purpose registry. Footnote markers are retained because exceptions and qualifications matter. Routing or operational claims require separate current evidence.

Source

• IANA IPv4 Special-Purpose Address Registry, checked 2026-07-22