----- Original Message Follows ----- From: "william(at)elan.net" <william@elan.net>

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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 >> think.

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

Simple math from above: Allocated & Not Routed: 3118838 (/24 blocks) - 21%

I believe I wasn't clear. I meant to say, what fraction of this is in actual use, but not publically routed as opposed to the percent allocated and not in use, say, by defunct companies.

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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.

This is what I was getting at, but you've given an upper bound (21%) and I'm positive it's not even close to that. Still, it reduces the 21% to a amaller number. scott