ip reclamation was Re: Kremen's Buddy?

Wed Sep 13 00:32:09 UTC 2006

On Tue, 12 Sep 2006, william(at)elan.net wrote:

>> How much, though, is used, but not routed publically?
>
> -----------------------
> TOTAL FOR IPV4 BLOCKS:
>
> 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%

> 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.

The larged of these blocks are 6/8, 11/8, 21/8, 22/8, 25/8, 26/8, 28/8, 
29/8, 30/8. 51/8, 52/8, 56/8 and I strongly suspect 48/8. This comes to
total 851968 /24s; this still leaves 2266870 /24 blocks that includes
some smaller used but not advertised and some no-longer-used space.
I suspect the total would be around 1/2 of value above, i.e. around
10% of ip space is something that could potentially be reclaimed
(that is unless you want to bug us military who have way too much space).

-- 
William Leibzon
Elan Networks
william at elan.net