David Farmer wrote:
Rather than updating the reference from RFC3330 to RFC6890, by the way, RFC6890 itself has been updated by RFC8190. Further, numerous RFCs have updated the registry since its creation by RFC5736 and its expansion by RFC6890. Therefore, I think it would be better to directly reference the "IANA IPv4 Special-Purpose Address Registry" at its permanent URL (https://www.iana.org/assignments/iana-ipv4-special-registry ), instead of referencing the RFC that created the registry.
This is sound. When we wrote RFC 6890 we intended to make the registry a stable and authoritative source, rather than have to update whatever the RFC was at the time that an assignment changed or a new assignment was made. Referencing the registry instead of an RFC makes sense. Kind regards, Leo Vegoda