Allocated IP blocks

Is there a list anywhere of allocated IP blocks?

I need to update my IDS sensor's table of valid blocks. It's alarming on some traffic coming from 67, 68 and 219, which I know were not allocated until fairly recently.

Is there a simple list somewhere, i.e:

4.0.0.0/8
6.0.0.0/8
....
219.0.0.0/24
etc... ??

IANA.org of course!

Thanks, I was looking at ARIN... wrong place for that, it would seem! :wink:

Rob Thomas maintains a a nice list:

http://www.cymru.com/Documents/bogon-list.html

You can also find the converse, the routes that /aren't/
registered (or supposed to be sending traffic), with

whois -h whois.radb.net rs-martians

Pete.