IANA 6to4 assignment status


Is there a reason why the status of 2002::/16 in IANA's IPv6 unicast assignments list [1] is ALLOCATED (with '6to4' as designation and the note field indicating reservation) rather than RESERVED?

Best regards,


[1] IPv6 Global Unicast Address Assignments

Perhaps something to do with it being ALLOCATED to the NRO (for rev. dns)?



It can probably be moved back to 'reserved' once we're *sure* that 6to4
has finally been stamped out, never to return. But I'm sure that *some*
ISP or company out there is still using it as their main strategy for
migrating to IPv6.

I see, thanks for the explanation.

One follow-up question: Why is the designation "6to4" rather than "IANA"? I would have expected the latter, as 2002::/16---similarly to the individual parts of 2001::/23---is listed under IANA's IPv6 Special-Purpose Address Registry.

Thanks in advance,


[1] IANA IPv6 Special-Purpose Address Registry