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@elan.net