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[RRG] Maps of IPv4 BGP advertisements and ping responses
- To: Routing Research Group list <email@example.com>
- Subject: [RRG] Maps of IPv4 BGP advertisements and ping responses
- From: Robin Whittle <firstname.lastname@example.org>
- Date: Sat, 20 Oct 2007 13:01:18 +1000
- Organization: First Principles
- User-agent: Thunderbird 22.214.171.124 (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:
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.
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.
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
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