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Re: ip reclamation was Re: Kremen's Buddy?

  • From: william(at)
  • Date: Tue Sep 12 19:43:01 2006

On Tue, 12 Sep 2006, Scott Weeks wrote:

----- Original Message Follows -----
From: Joe Abley <>

Le 2006-09-12 à 15:10, <>
a écrit :

It makes me wonder just how much space like that there
is out there artifically increasing IP scarcity.
The fact that there is a lot of space assigned/allocated
and not used   in any easily observable way is well known
to those who track the   address exhaustion issue, I

How much, though, is used, but not routed publically?

Allocated: 9302367 (/24 blocks) - 63%
Not Allocated: 5377697 (/24 blocks) - 37%
Currently Routed: 6183529 (/24 blocks) - 42%
Not Routed: 8496535 (/24 blocks) - 58%
Simple math from above:
Allocated & Not Routed: 3118838 (/24 blocks) - 21%

This is from my data available at
(which is for some reason partially broken right now - has all the
correct data but coloring of bars did not happen). The percent calculation does not include class-d and class-e (i.e. only blocks
0/8 - 223/8 are counted).

Something that has been brought up from time to time here.
It's not easily observable, but allowed.
Not easily observable means some ip blocks maybe used but are not adverised in public BGP. This is a bit of an issue with certain
part of US Gov.


William Leibzon
Elan Networks

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