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

Emile Aben emile.aben at
Tue Aug 13 09:26:08 CEST 2013

Hi Martin,

On 11/07/2013 10:15, Martin Millnert 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).

For 1 Aug 2013 I found that about 70% of IPv4 address space is announced
by ASNs which also announce IPv6 address space.
Short RIPE Labs article about it:

Emile Aben

PS: apologies for late reply, it's vacation time :)

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