I've used the MaxMind Lite geo-ip database plus some perl modules and a BGP table to get something fairly close. Anything in the BGP table that was larger than a /20 I split into /20's. For my use case, this was close enough. I then grabbed 30 or so IP's within the range and geo-ip mapped them. You can then apply some algebra and get a general idea of where things are or are not.
Things I used: http://search.cpan.org/~plonka/Net-Patricia-1.014/Patricia.pm - For ip/prefix/lat-lon mapping http://search.cpan.org/~borisz/Geo-IP-1.41/lib/Geo/IP.pm - For Geo-IP lat/lon data http://dev.maxmind.com/geoip/legacy/geolite - Maxmind's city database http://data.caida.org/datasets/routing/routeviews-prefix2as/ - for BGP prefix/mask + src ASN info Good luck! --chip On Thu, May 23, 2013 at 3:47 PM, shawn wilson <ag4ve...@gmail.com> wrote: > What's the best way to find the networks in a country? I was thinking of > writing some perl with Net::Whois::ARIN or some such module and loop > through the block. But I think I'll have to be smarter than just a simple > loop not to get blocked and I figure I'm not the first to want to do this. > > I've noticed some paid databases out there. They don't cost much but are > they even worth what they charge? Ie, countryipblocks.net doesn't list > quite a few addresses from a country I've looked at blocking. Isn't this > information free from the different *NICs anyway? > > This is probably two questions: a program that smartly looks for country's > blocks in a block and are GeoIP services worth anything? > -- Just my $.02, your mileage may vary, batteries not included, etc....
