Amount of announced IPv4-space by ASN not announcing IPv6?

Justin Seabrook-Rocha xenith at
Thu Jul 11 18:23:53 CEST 2013

On Thu, Jul 11, 2013 at 1:15 AM, Martin Millnert <martin at> wrote:

> Dear friends of integers,
> appeared in an discussion on an IRC
> channel recently, and it occurred to me that a crucial bit of
> information is not available, namely "What is the total amount of IPv4
> address space announced by ASNs which do (not) also announce IPv6?" (or
> variants of).
> Argument was around how large % of IP4v address space is owned by
> long-tail ASNs, which have quite minor relevance to the major rolling
> out of IPv6 in terms of absolute number of internet hosts covered
> (circa).
> I have not seen this statistics reported anywhere, but I believe at
> least one of our list members have the source data to produce this
> information (hopefully with relative ease).
> Best regards,
> Martin

Hurricane Electric's BGP progress report will probably provide most of the
data you need:

Justin Seabrook-Rocha
Xenith || xenith at ||
Jabber: xenith at
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