RFC 9872
Recommendations for Discovering IPv6 Prefix Used for IPv6 Address Synthesis, September 2025
- File formats:

- Also available: XML file for editing
- Status:
- INFORMATIONAL
- Authors:
- N. Buraglio
T. Jensen
J. Linkova - Stream:
- IETF
- Source:
- v6ops (ops)
Cite this RFC: TXT | XML | BibTeX
DOI: https://doi.org/10.17487/RFC9872
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Abstract
On networks providing IPv4-IPv6 translation (RFC 7915), hosts and other endpoints need to know the IPv6 prefix(es) used for translation (the NAT64 prefix (RFC 6052)). This document provides guidelines for NAT64 prefix discovery, specifically recommending obtaining the NAT64 prefix from the Router Advertisement option (RFC 8781) when available.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.