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[RRG] Maps of IPv4 BGP advertisements and ping responses
- To: Routing Research Group list <rrg@psg.com>
- Subject: [RRG] Maps of IPv4 BGP advertisements and ping responses
- From: Robin Whittle <rw@firstpr.com.au>
- Date: Sat, 20 Oct 2007 13:01:18 +1000
- Organization: First Principles
- User-agent: Thunderbird 2.0.0.6 (Windows/20070728)
There are detailed maps, month-by-month, 4096x4096 pixels, of the
IPv4 address space down to /24 resolution showing how much has been
advertised and in what prefix length:
http://maps.measurement-factory.com/
http://maps.measurement-factory.com/gallery/Routeviews/
The Information Sciences Institute of the University of Southern
California recently pinged every advertised IPv4 address - and
printed a map with one 600DPI pixel per IP address.
http://www.isi.edu/ant/address/
They found about 103 million ping-responsive hosts, which is similar
to the 108 million figure I estimated by extrapolating my random
ping survey results from earlier this year. My survey concentrated
on the widely different ping-response rates, and statistical
distribution of these, in prefixes of different lengths.
http://www.firstpr.com.au/ip/host-density-per-prefix/
Of course there are difficulties relying on ping to estimate the
number of actively used addresses. The true figure would be higher
- perhaps much higher - though a few networks have large numbers of
addresses responding to pings in order to attract and measure the
activities of malware.
I read about these two mapping projects via the Mapping-Cyberspace
discussion list: http://www.cybergeography.org/discussion.html
- Robin
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