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Whose CIDR is it anyway?
A look at CIDR block ownership from a RIR-, country-, and organization level. Originally presented at RIPE88.
2 I then performed a DNS lookup against Team Cymru's IP to ASN service, and cross referenced all that with the data from published RIR statistics using the usual hodgepodge of Perl, awk(1), and shell glue. Click the image for an interactive map.Of interest here is the fact that, apparently, there have been no IPv6 allocations for Central African Republic, Eritrea, and North Korea (as well as, perhaps less surprisingly, Antarctica, Falkland Islands, French Southern and Antarctic Lands, Kosovo, Svalbard and Jan Mayen, and Western Sahara). The internet kind of lost its shit there and assumed all sorts of nefarious reasons behind that — and of course things did break because some people had simply squatted on that IP space internally and got a fun surprise that morning.
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